* Re: [PATCHv3] blk-mq: pop cached request if it is usable
From: Ming Lei @ 2026-05-22 4:12 UTC (permalink / raw)
To: Keith Busch; +Cc: Keith Busch, axboe, hch, linux-block
In-Reply-To: <ag-1EoopSdp0JZR5@kbusch-mbp>
On Thu, May 21, 2026 at 07:44:50PM -0600, Keith Busch wrote:
> On Fri, May 22, 2026 at 07:33:39AM +0800, Ming Lei wrote:
> >
> > BTW, as mentioned in v2, the request may be added back in case of merge,
> > but seems not a big deal given blk_mq_free_plug_rqs() doesn't free requests
> > in batch.
>
> We could introduce a special goto label for the merge case to push it
It can be done simply by replacing the added `blk_mq_free_request` with moving
it back to plug list.
> back to the cached requests, but it's not clear that it's worth it. The
> cached requests are preallocated to match what is about to be dispatched
> (up to a limit), so if a merge happens, there may not be another
> subsequent bio submissions to use it, so it would just get freed as an
> unused request later anyway. And if we block on the split bio allocation
> such that it frees the cached rq list, I think we've already lost the
> optimization battle, so no need to complicate things.
I mean plain sequential IO workload, in which batch allocation is taken, and
just the 1st request is used, all others are freed one by one, which may
be improved to batch release too in theory.
Thanks,
Ming
^ permalink raw reply
* Re: [PATCH] loop: add sync_blockdev() in __loop_clr_fd() to prevent UAF
From: Ming Lei @ 2026-05-22 3:45 UTC (permalink / raw)
To: Tetsuo Handa
Cc: Jens Axboe, linux-block, syzbot+cd8a9a308e879a4e2c28,
syzbot+bc273027d5643e48e5b3, Hongling Zeng, Bart Van Assche,
Andrew Morton
In-Reply-To: <e4deece5-d866-4a44-9097-eaa1e2727c0b@I-love.SAKURA.ne.jp>
On Fri, May 22, 2026 at 12:28:34PM +0900, Tetsuo Handa wrote:
> On 2026/05/22 11:54, Ming Lei wrote:
> > Fix this by adding sync_blockdev() in __loop_clr_fd() to flush all
> > pending writeback I/O before clearing lo->lo_backing_file. Since the
> > loop disk is already closed at this point, no new I/O can be submitted
> > — only writeback remains.
>
> Why can you assume that synchronize_rcu() + drain_workqueue(lo->workqueue)
> is unnecessary? Since we don't know exact commit which is causing this
> problem, we don't know what has changed.
When sync_blockdev() returns, there can't be any inflight IO:
- no one can open this loop disk
- no dirty page cache any more
So why do you want to add rcu/drain_workqueue?
Fixes: 1fe0b1acb14d ("loop: only freeze the queue in __loop_clr_fd when needed")
Thanks,
Ming
^ permalink raw reply
* Re: [PATCH] loop: add sync_blockdev() in __loop_clr_fd() to prevent UAF
From: Tetsuo Handa @ 2026-05-22 3:28 UTC (permalink / raw)
To: Ming Lei, Jens Axboe, linux-block
Cc: syzbot+cd8a9a308e879a4e2c28, syzbot+bc273027d5643e48e5b3,
Hongling Zeng, Bart Van Assche, Andrew Morton
In-Reply-To: <20260522025451.845068-1-tom.leiming@gmail.com>
On 2026/05/22 11:54, Ming Lei wrote:
> Fix this by adding sync_blockdev() in __loop_clr_fd() to flush all
> pending writeback I/O before clearing lo->lo_backing_file. Since the
> loop disk is already closed at this point, no new I/O can be submitted
> — only writeback remains.
Why can you assume that synchronize_rcu() + drain_workqueue(lo->workqueue)
is unnecessary? Since we don't know exact commit which is causing this
problem, we don't know what has changed.
^ permalink raw reply
* [PATCH] loop: add sync_blockdev() in __loop_clr_fd() to prevent UAF
From: Ming Lei @ 2026-05-22 2:54 UTC (permalink / raw)
To: Jens Axboe, linux-block
Cc: Ming Lei, syzbot+cd8a9a308e879a4e2c28,
syzbot+bc273027d5643e48e5b3, Tetsuo Handa, Hongling Zeng,
Bart Van Assche, Andrew Morton
The syzbot report describes a NULL pointer dereference in lo_rw_aio()
caused by a race between lo_release() and loop_queue_rq().
__loop_clr_fd() clears lo->lo_backing_file while an already-scheduled
asynchronous I/O work (lo_rw_aio) is about to execute on a kworker.
Since the kworker enters lo_rw_aio() after lo->lo_backing_file has been
set to NULL, it dereferences the NULL pointer when initializing the
kiocb, leading to a general protection fault.
Fix this by adding sync_blockdev() in __loop_clr_fd() to flush all
pending writeback I/O before clearing lo->lo_backing_file. Since the
loop disk is already closed at this point, no new I/O can be submitted
— only writeback remains.
Reported-by: syzbot+cd8a9a308e879a4e2c28@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=cd8a9a308e879a4e2c28
Reported-by: syzbot+bc273027d5643e48e5b3@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=bc273027d5643e48e5b3
Analyzed-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: Hongling Zeng <zenghongling@kylinos.cn>
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: Bart Van Assche <bvanassche@acm.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Link: https://lore.kernel.org/linux-block/9b2032d6-3f36-4d2b-8128-985c08a4fa37@I-love.SAKURA.ne.jp/
Signed-off-by: Ming Lei <tom.leiming@gmail.com>
---
drivers/block/loop.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 0000913f7efc..023e20a88a8a 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -1118,6 +1118,9 @@ static void __loop_clr_fd(struct loop_device *lo)
struct file *filp;
gfp_t gfp = lo->old_gfp_mask;
+ /* flush outstanding writeback I/O before clearing lo_backing_file */
+ sync_blockdev(lo->lo_device);
+
spin_lock_irq(&lo->lo_lock);
filp = lo->lo_backing_file;
lo->lo_backing_file = NULL;
--
2.54.0
^ permalink raw reply related
* Re: [PATCH 7.2 0/2] ublk: enable UBLK_F_SHMEM_ZC on zone appends
From: Ming Lei @ 2026-05-22 1:53 UTC (permalink / raw)
To: Caleb Sander Mateos; +Cc: Jens Axboe, linux-block, linux-kernel
In-Reply-To: <20260520203654.1413640-1-csander@purestorage.com>
On Wed, May 20, 2026 at 02:36:52PM -0600, Caleb Sander Mateos wrote:
> Commit 4d4a512a1f87 ("ublk: add PFN-based buffer matching in I/O path")
> added support to ublk_setup_iod() for matching request buffers against
> registered UBLK_F_SHMEM_ZC buffers, but missed adding it to
> ublk_setup_iod_zoned() for zoned requests. ublk_setup_iod_zoned()
> duplicates the code for initializing struct ublksrv_io_desc, making it
> easy to forget to keep them in sync. Move the common code to a helper
> function ublk_init_iod(). This allows zone appends to leverage the
> shared memory zero copy optimization.
>
> This series is based on "ublk: optimize ublk_rq_has_data()" [1]
>
> [1]: https://lore.kernel.org/linux-block/20260513211846.1956810-1-csander@purestorage.com/
Looks fine, it just allows the optimization for zone append.
Reviewed-by: Ming Lei <tom.leiming@gmail.com>
Thanks,
Ming
^ permalink raw reply
* Re: [PATCHv3] blk-mq: pop cached request if it is usable
From: Keith Busch @ 2026-05-22 1:44 UTC (permalink / raw)
To: Ming Lei; +Cc: Keith Busch, axboe, hch, linux-block
In-Reply-To: <ag-WUymW2vwVyMJB@fedora>
On Fri, May 22, 2026 at 07:33:39AM +0800, Ming Lei wrote:
>
> BTW, as mentioned in v2, the request may be added back in case of merge,
> but seems not a big deal given blk_mq_free_plug_rqs() doesn't free requests
> in batch.
We could introduce a special goto label for the merge case to push it
back to the cached requests, but it's not clear that it's worth it. The
cached requests are preallocated to match what is about to be dispatched
(up to a limit), so if a merge happens, there may not be another
subsequent bio submissions to use it, so it would just get freed as an
unused request later anyway. And if we block on the split bio allocation
such that it frees the cached rq list, I think we've already lost the
optimization battle, so no need to complicate things.
^ permalink raw reply
* [linux-next:master] BUILD REGRESSION 550604d6c9b9efc8d068aff94dc301694a7afdee
From: kernel test robot @ 2026-05-22 0:33 UTC (permalink / raw)
To: Andrew Morton
Cc: Linux Memory Management List, amd-gfx, dri-devel, kexec, keyrings,
linux-aio, linux-block, linux-fsdevel, linux-gpio, linux-hexagon,
linux-modules, linux-nfs, linux-perf-users, linux-riscv,
linux-security-module, linux-serial, linux-um, linuxppc-dev,
netdev, sparclinux, Mark Brown
tree/branch: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
branch HEAD: 550604d6c9b9efc8d068aff94dc301694a7afdee Add linux-next specific files for 20260521
Error/Warning (recently discovered and may have been fixed):
https://lore.kernel.org/oe-kbuild-all/202605212104.SAIMqegX-lkp@intel.com
https://lore.kernel.org/oe-kbuild-all/202605220247.dQAHslyv-lkp@intel.com
https://lore.kernel.org/oe-kbuild-all/202605220312.Pu7UO05u-lkp@intel.com
https://lore.kernel.org/oe-kbuild-all/202605220631.ugDr2VPb-lkp@intel.com
/usr/bin/ld: sound/soc/codecs/es9356.o:(.rodata+0x2c30): undefined reference to `sdca_asoc_q78_get_volsw'
/usr/bin/ld: sound/soc/codecs/es9356.o:(.rodata+0x2c38): undefined reference to `sdca_asoc_q78_put_volsw'
arch/hexagon/kernel/syscalltab.c:19:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
arch/powerpc/kernel/pci_64.c:226:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
arch/powerpc/kernel/rtas.c:1850:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
arch/powerpc/kernel/signal_32.c:990:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
arch/powerpc/kernel/signal_64.c:657:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
arch/powerpc/kernel/sys_ppc32.c:70:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
arch/powerpc/kernel/syscalls.c:52:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
arch/riscv/kernel/sys_hwprobe.c:606:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
arch/riscv/kernel/sys_riscv.c:43:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
arch/sparc/kernel/sys_sparc32.c:54:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
arch/sparc/kernel/sys_sparc_64.c:351:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
arch/x86/um/syscalls_64.c:43:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
block/ioprio.c:65:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_crat.c:1830:26: error: cannot take the address of an rvalue of type 'int'
drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_crat.c:1830:27: error: call to undeclared function 'cpu_data'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_crat.c:1833:23: error: use of undeclared identifier 'X86_VENDOR_AMD'
drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_crat.c:1833:7: error: incomplete definition of type 'struct cpuinfo_x86'
drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_topology.c:2353:41: error: member reference base type 'int' is not a structure or union
drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_topology.c:2353:9: error: call to undeclared function 'cpu_data'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
drivers/gpu/drm/amd/amdgpu/jpeg_v2_5.c:152:68: warning: '%d' directive output may be truncated writing between 1 and 11 bytes into a region of size 7 [-Wformat-truncation=]
drivers/gpu/drm/scheduler/tests/tests_scheduler.c:675:10: error: initializer element is not a compile-time constant
drivers/pinctrl/pinctrl-generic.c:130:5: error: redefinition of 'pinctrl_generic_pins_function_dt_node_to_map'
drivers/pinctrl/pinctrl-generic.c:20:5: error: conflicting types for 'pinctrl_generic_to_map'; have 'int(struct pinctrl_dev *, struct device_node *, struct device_node *, struct pinctrl_map **, unsigned int *, unsigned int *, const char **, unsigned int, const char **, unsigned int *, unsigned int)'
fs/aio.c:1436:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
fs/d_path.c:413:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
fs/eventfd.c:414:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
fs/eventpoll.c:2200:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
fs/eventpoll.c:2483:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
fs/exec.c:1924:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
fs/exec.c:1925:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
fs/fcntl.c:587:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
fs/fhandle.c:129:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
fs/file.c:818:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
fs/file.c:819:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
fs/file_attr.c:374:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
fs/fsopen.c:120:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
fs/ioctl.c:583:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
fs/locks.c:2214:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
fs/locks.c:2280:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
fs/namei.c:5186:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
fs/namei.c:5197:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
fs/namespace.c:2068:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
fs/namespace.c:2073:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
fs/notify/inotify/inotify_user.c:720:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
fs/open.c:152:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
fs/pipe.c:1054:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
fs/pipe.c:1055:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
fs/read_write.c:412:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
fs/readdir.c:215:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
fs/readdir.c:304:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
fs/select.c:722:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
fs/select.c:733:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
fs/signalfd.c:299:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
fs/splice.c:1578:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
fs/stat.c:420:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
fs/stat.c:505:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
fs/statfs.c:191:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
fs/sync.c:148:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
fs/timerfd.c:394:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
fs/timerfd.c:424:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
fs/utimes.c:142:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
fs/xattr.c:732:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
fs/xattr.c:735:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
ipc/msg.c:315:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
ipc/sem.c:624:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
ipc/shm.c:847:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
ipc/shm.c:849:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
kernel/capability.c:137:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
kernel/events/core.c:13844:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
kernel/events/core.c:13853:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
kernel/exec_domain.c:38:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
kernel/exit.c:1082:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
kernel/exit.c:1112:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
kernel/fork.c:1785:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
kernel/fork.c:1808:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
kernel/futex/syscalls.c:28:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
kernel/groups.c:161:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
kernel/kcmp.c:135:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
kernel/kexec.c:242:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
kernel/module/main.c:804:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
kernel/nsproxy.c:569:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
kernel/nstree.c:763:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
kernel/pid.c:695:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
kernel/printk/printk.c:1853:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
kernel/ptrace.c:1388:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
kernel/ptrace.c:1415:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
kernel/reboot.c:728:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
kernel/rseq.c:547:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
kernel/sched/membarrier.c:634:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
kernel/sched/membarrier.c:636:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
kernel/sched/syscalls.c:132:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
kernel/seccomp.c:2126:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
kernel/signal.c:3319:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
kernel/sys.c:259:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
kernel/time/hrtimer.c:2381:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
kernel/time/hrtimer.c:2466:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
kernel/time/hrtimer.c:2487:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
kernel/time/itimer.c:113:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
kernel/time/posix-stubs.c:26:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
kernel/time/posix-timers.c:566:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
kernel/time/posix-timers.c:574:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
kernel/time/time.c:105:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
kernel/time/time.c:140:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
kernel/time/time.c:62:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
kernel/uid16.c:23:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
ld.lld: error: undefined symbol: sdca_asoc_q78_get_volsw
ld.lld: error: undefined symbol: sdca_asoc_q78_put_volsw
mm/fadvise.c:200:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
mm/filemap.c:4713:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
mm/filemap.c:4718:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
mm/madvise.c:2013:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
mm/madvise.c:2029:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
mm/memfd.c:505:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
mm/mincore.c:292:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
mm/mlock.c:665:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
mm/mmap.c:116:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
mm/mprotect.c:985:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
mm/mremap.c:2023:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
mm/msync.c:32:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
mm/oom_kill.c:1195:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
mm/process_vm_access.c:292:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
mm/readahead.c:736:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
mm/readahead.c:760:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
mm/swapfile.c:2903:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
mm/swapfile.c:3124:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
net/socket.c:1818:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
net/socket.c:1833:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
security/keys/compat.c:17:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
security/keys/keyctl.c:74:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
security/landlock/syscalls.c:203:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
security/lsm_syscalls.c:57:1: error: unknown warning group '-Wattribute-alias', ignored [-Werror,-Wunknown-warning-option]
Unverified Error/Warning (likely false positive, kindly check if interested):
Warning: block/blk-map.c:366 Excess function parameter 'op' description in 'bio_copy_kern'
csky-linux-ld: sound/soc/codecs/es9356.o:(.rodata+0x16c8): undefined reference to `sdca_asoc_q78_get_volsw'
csky-linux-ld: sound/soc/codecs/es9356.o:(.rodata+0x16cc): undefined reference to `sdca_asoc_q78_put_volsw'
drivers/android/binder_alloc.c:389:1: internal compiler error: in final_scan_insn_1, at final.cc:2813
drivers/auxdisplay/panel.c:1508:1: internal compiler error: in final_scan_insn_1, at final.cc:2813
drivers/base/regmap/regmap-debugfs.c:180:1: internal compiler error: in final_scan_insn_1, at final.cc:2813
drivers/char/xillybus/xillybus_core.c:425:1: internal compiler error: in final_scan_insn_1, at final.cc:2813
drivers/dma/qcom/hidma.c:389:1: internal compiler error: in final_scan_insn_1, at final.cc:2813
drivers/gpu/drm/amd/amdgpu/dce_v10_0.c:2853:1: internal compiler error: in final_scan_insn_1, at final.cc:2813
drivers/gpu/drm/nouveau/nvkm/subdev/acr/base.c:357:1: internal compiler error: in final_scan_insn_1, at final.cc:2813
drivers/gpu/drm/nouveau/nvkm/subdev/iccsense/base.c:295:1: internal compiler error: in final_scan_insn_1, at final.cc:2813
drivers/gpu/drm/udl/udl_main.c:260:1: internal compiler error: in final_scan_insn_1, at final.cc:2813
drivers/gpu/drm/xe/xe_sched_job.c:162:1: internal compiler error: in final_scan_insn_1, at final.cc:2813
drivers/greybus/es2.c:1428:1: internal compiler error: in final_scan_insn_1, at final.cc:2813
drivers/hwmon/ibmpex.c:433:1: internal compiler error: in final_scan_insn_1, at final.cc:2813
drivers/media/i2c/ds90ub960.c:4790:1: internal compiler error: in final_scan_insn_1, at final.cc:2813
drivers/mtd/parsers/redboot.c:304:1: internal compiler error: in final_scan_insn_1, at final.cc:2813
drivers/mtd/spi-nor/core.c:1645:1: internal compiler error: in final_scan_insn_1, at final.cc:2813
drivers/net/ethernet/mellanox/mlx5/core/cmd.c:1508:1: internal compiler error: in final_scan_insn_1, at final.cc:2813
drivers/scsi/aacraid/commsup.c:1928:1: internal compiler error: in final_scan_insn_1, at final.cc:2813
drivers/scsi/aacraid/dpcsup.c:216:1: internal compiler error: in final_scan_insn_1, at final.cc:2813
drivers/thunderbolt/stream.c:1388:1: internal compiler error: in final_scan_insn_1, at final.cc:2813
drivers/tty/serial/max310x.c:1727:24: error: incompatible pointer types passing 'struct i2c_driver *' to parameter of type 'struct spi_driver *' [-Wincompatible-pointer-types]
drivers/tty/serial/max310x.c:1727:25: error: use of undeclared identifier 'max310x_spi_driver'; did you mean 'max310x_i2c_driver'?
drivers/tty/serial/max310x.c:1727:32: error: 'max310x_spi_driver' undeclared (first use in this function); did you mean 'max310x_i2c_driver'?
drivers/tty/serial/max310x.c:1745:25: error: 'max310x_spi_driver' undeclared (first use in this function); did you mean 'max310x_i2c_driver'?
drivers/tty/serial/max310x.c:1745:32: error: 'max310x_spi_driver' undeclared (first use in this function); did you mean 'max310x_i2c_driver'?
drivers/usb/host/xhci-mem.c:866:1: internal compiler error: in final_scan_insn_1, at final.cc:2813
drivers/usb/misc/usbtest.c:1416:1: internal compiler error: in final_scan_insn_1, at final.cc:2813
drivers/usb/serial/usb_wwan.c:501:1: internal compiler error: in final_scan_insn_1, at final.cc:2813
fs/btrfs/file.c:3288:1: internal compiler error: in final_scan_insn_1, at final.cc:2813
fs/btrfs/inode.c:8975:1: internal compiler error: in final_scan_insn_1, at final.cc:2813
fs/isofs/inode.c:1267:1: internal compiler error: in final_scan_insn_1, at final.cc:2813
fs/nilfs2/recovery.c:397:1: internal compiler error: in final_scan_insn_1, at final.cc:2813
fs/xfs/scrub/bitmap.c:116:1: internal compiler error: in final_scan_insn_1, at final.cc:2813
kernel/bpf/syscall.c:3797:1: internal compiler error: in final_scan_insn_1, at final.cc:2813
kernel/events/core.c:12131:1: internal compiler error: in final_scan_insn_1, at final.cc:2813
kernel/trace/ring_buffer.c:2348:1: internal compiler error: in final_scan_insn_1, at final.cc:2813
ld.lld: error: call to __compiletime_assert_537 marked "dontcall-error": BUILD_BUG_ON failed: 21 - 1 != HWEIGHT32( (VALID_OPENAT2_FLAGS & ~(O_NONBLOCK | O_NDELAY)) | __FMODE_EXEC)
lib/raid/raid6/powerpc/altivec1.c:37:16: sparse: sparse: Trying to use reserved word 'signed' as identifier
lib/raid/raid6/powerpc/altivec1.c:37:16: sparse: sparse: two or more data types in declaration specifiers
lib/raid/raid6/powerpc/altivec2.c:37:16: sparse: sparse: Trying to use reserved word 'signed' as identifier
lib/raid/raid6/powerpc/altivec2.c:37:16: sparse: sparse: two or more data types in declaration specifiers
lib/raid/raid6/powerpc/altivec4.c:37:16: sparse: sparse: Trying to use reserved word 'signed' as identifier
lib/raid/raid6/powerpc/altivec4.c:37:16: sparse: sparse: two or more data types in declaration specifiers
lib/raid/raid6/powerpc/altivec8.c:37:16: sparse: sparse: Trying to use reserved word 'signed' as identifier
lib/raid/raid6/powerpc/altivec8.c:37:16: sparse: sparse: two or more data types in declaration specifiers
net/bluetooth/mgmt.c:4400:1: internal compiler error: in final_scan_insn_1, at final.cc:2813
Error/Warning ids grouped by kconfigs:
recent_errors
|-- alpha-allnoconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- alpha-allyesconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- alpha-defconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- alpha-randconfig-r052-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- arc-allmodconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- arc-allnoconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- arc-defconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- arm-allnoconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- arm-allyesconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- arm-defconfig
| |-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
| |-- block-ioprio.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-aio.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-d_path.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-eventfd.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-eventpoll.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-exec.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-fcntl.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-fhandle.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-file.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-file_attr.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-fsopen.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-ioctl.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-locks.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-namei.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-namespace.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-notify-inotify-inotify_user.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-open.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-pipe.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-read_write.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-readdir.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-select.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-signalfd.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-splice.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-stat.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-statfs.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-sync.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-timerfd.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-utimes.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-xattr.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- ipc-msg.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- ipc-sem.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- ipc-shm.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-capability.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-events-core.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-exec_domain.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-exit.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-fork.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-futex-syscalls.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-groups.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-kcmp.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-kexec.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-module-main.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-nsproxy.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-nstree.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-pid.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-printk-printk.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-ptrace.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-reboot.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-rseq.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-sched-membarrier.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-sched-syscalls.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-seccomp.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-signal.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-sys.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-time-hrtimer.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-time-itimer.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-time-posix-timers.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-time-time.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-uid16.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-fadvise.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-filemap.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-madvise.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-memfd.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-mincore.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-mlock.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-mmap.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-mprotect.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-mremap.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-msync.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-oom_kill.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-process_vm_access.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-readahead.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-swapfile.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- net-socket.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| `-- security-keys-keyctl.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
|-- arm-randconfig-001-20260521
| |-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
| `-- block-ioprio.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
|-- arm-randconfig-002-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- arm-randconfig-004-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- arm-randconfig-r062-20260521
| |-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
| |-- block-ioprio.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-d_path.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-eventfd.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-eventpoll.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-exec.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-fcntl.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-file.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-file_attr.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-fsopen.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-ioctl.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-namei.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-namespace.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-notify-inotify-inotify_user.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-open.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-pipe.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-read_write.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-readdir.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-select.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-signalfd.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-splice.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-stat.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-statfs.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-sync.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-utimes.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-xattr.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- ipc-msg.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- ipc-sem.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- ipc-shm.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-capability.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-events-core.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-exec_domain.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-exit.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-fork.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-futex-syscalls.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-groups.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-module-main.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-nsproxy.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-nstree.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-pid.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-printk-printk.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-ptrace.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-reboot.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-rseq.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-sched-membarrier.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-sched-syscalls.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-signal.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-sys.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-time-hrtimer.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-time-itimer.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-time-posix-timers.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-time-time.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-uid16.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-fadvise.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-filemap.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-madvise.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-memfd.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-mincore.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-mlock.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-mmap.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-mprotect.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-mremap.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-msync.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-oom_kill.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-process_vm_access.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-readahead.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- net-socket.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| `-- security-keys-keyctl.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
|-- arm64-allnoconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- arm64-defconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- arm64-randconfig-001-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- arm64-randconfig-003-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- arm64-randconfig-004
| |-- ld.lld:error:undefined-symbol:sdca_asoc_q78_get_volsw
| `-- ld.lld:error:undefined-symbol:sdca_asoc_q78_put_volsw
|-- arm64-randconfig-004-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- arm64-randconfig-r072-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- csky-allmodconfig
| `-- drivers-thunderbolt-stream.c:internal-compiler-error:in-final_scan_insn_1-at-final.cc
|-- csky-allnoconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- csky-defconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- csky-randconfig-001-20260521
| |-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
| |-- drivers-base-regmap-regmap-debugfs.c:internal-compiler-error:in-final_scan_insn_1-at-final.cc
| |-- drivers-gpu-drm-nouveau-nvkm-subdev-acr-base.c:internal-compiler-error:in-final_scan_insn_1-at-final.cc
| |-- drivers-gpu-drm-nouveau-nvkm-subdev-iccsense-base.c:internal-compiler-error:in-final_scan_insn_1-at-final.cc
| |-- drivers-gpu-drm-udl-udl_main.c:internal-compiler-error:in-final_scan_insn_1-at-final.cc
| |-- drivers-gpu-drm-xe-xe_sched_job.c:internal-compiler-error:in-final_scan_insn_1-at-final.cc
| |-- drivers-greybus-es2.c:internal-compiler-error:in-final_scan_insn_1-at-final.cc
| |-- drivers-mtd-parsers-redboot.c:internal-compiler-error:in-final_scan_insn_1-at-final.cc
| |-- drivers-scsi-aacraid-commsup.c:internal-compiler-error:in-final_scan_insn_1-at-final.cc
| |-- drivers-scsi-aacraid-dpcsup.c:internal-compiler-error:in-final_scan_insn_1-at-final.cc
| |-- drivers-usb-host-xhci-mem.c:internal-compiler-error:in-final_scan_insn_1-at-final.cc
| |-- drivers-usb-misc-usbtest.c:internal-compiler-error:in-final_scan_insn_1-at-final.cc
| |-- drivers-usb-serial-usb_wwan.c:internal-compiler-error:in-final_scan_insn_1-at-final.cc
| |-- fs-btrfs-file.c:internal-compiler-error:in-final_scan_insn_1-at-final.cc
| |-- fs-btrfs-inode.c:internal-compiler-error:in-final_scan_insn_1-at-final.cc
| |-- fs-isofs-inode.c:internal-compiler-error:in-final_scan_insn_1-at-final.cc
| |-- fs-nilfs2-recovery.c:internal-compiler-error:in-final_scan_insn_1-at-final.cc
| `-- fs-xfs-scrub-bitmap.c:internal-compiler-error:in-final_scan_insn_1-at-final.cc
|-- csky-randconfig-002-20260521
| |-- csky-linux-ld:sound-soc-codecs-es9356.o:(.rodata):undefined-reference-to-sdca_asoc_q78_get_volsw
| |-- csky-linux-ld:sound-soc-codecs-es9356.o:(.rodata):undefined-reference-to-sdca_asoc_q78_put_volsw
| |-- drivers-android-binder_alloc.c:internal-compiler-error:in-final_scan_insn_1-at-final.cc
| |-- drivers-auxdisplay-panel.c:internal-compiler-error:in-final_scan_insn_1-at-final.cc
| |-- drivers-char-xillybus-xillybus_core.c:internal-compiler-error:in-final_scan_insn_1-at-final.cc
| |-- drivers-hwmon-ibmpex.c:internal-compiler-error:in-final_scan_insn_1-at-final.cc
| |-- drivers-media-i2c-ds90ub960.c:internal-compiler-error:in-final_scan_insn_1-at-final.cc
| |-- drivers-mtd-spi-nor-core.c:internal-compiler-error:in-final_scan_insn_1-at-final.cc
| |-- kernel-events-core.c:internal-compiler-error:in-final_scan_insn_1-at-final.cc
| `-- kernel-trace-ring_buffer.c:internal-compiler-error:in-final_scan_insn_1-at-final.cc
|-- csky-randconfig-r062-20260521
| |-- drivers-dma-qcom-hidma.c:internal-compiler-error:in-final_scan_insn_1-at-final.cc
| |-- drivers-gpu-drm-amd-amdgpu-dce_v10_0.c:internal-compiler-error:in-final_scan_insn_1-at-final.cc
| |-- drivers-net-ethernet-mellanox-mlx5-core-cmd.c:internal-compiler-error:in-final_scan_insn_1-at-final.cc
| |-- kernel-bpf-syscall.c:internal-compiler-error:in-final_scan_insn_1-at-final.cc
| `-- net-bluetooth-mgmt.c:internal-compiler-error:in-final_scan_insn_1-at-final.cc
|-- hexagon-allmodconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- hexagon-allnoconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- hexagon-defconfig
| |-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
| `-- arch-hexagon-kernel-syscalltab.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
|-- hexagon-randconfig-001-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- hexagon-randconfig-002
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- i386-allnoconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- i386-buildonly-randconfig-001
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- i386-buildonly-randconfig-001-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- i386-buildonly-randconfig-003
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- i386-buildonly-randconfig-003-20260521
| |-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
| `-- drivers-tty-serial-max31.c:error:use-of-undeclared-identifier-max31_spi_driver
|-- i386-buildonly-randconfig-004
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- i386-buildonly-randconfig-005-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- i386-buildonly-randconfig-006-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- i386-defconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- i386-randconfig-001
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- i386-randconfig-001-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- i386-randconfig-002
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- i386-randconfig-002-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- i386-randconfig-003-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- i386-randconfig-004
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- i386-randconfig-005
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- i386-randconfig-006-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- i386-randconfig-007
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- i386-randconfig-051-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- i386-randconfig-052-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- i386-randconfig-054-20260521
| |-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
| `-- drivers-tty-serial-max31.c:error:max31_spi_driver-undeclared-(first-use-in-this-function)
|-- i386-randconfig-062-20260522
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- i386-randconfig-063-20260522
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- loongarch-allnoconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- loongarch-defconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- loongarch-randconfig-001
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- loongarch-randconfig-002
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- m68k-allmodconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- m68k-allnoconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- m68k-allyesconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- m68k-defconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- microblaze-allnoconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- microblaze-defconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- microblaze-randconfig-r061-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- mips-allnoconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- mips-randconfig-r071-20260521
| |-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
| |-- kernel-time-posix-stubs.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| `-- security-keys-keyctl.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
|-- nios2-allmodconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- nios2-allnoconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- nios2-defconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- nios2-randconfig-001
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- nios2-randconfig-002
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- nios2-randconfig-r054-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- openrisc-allmodconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- openrisc-allnoconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- parisc-allnoconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- parisc-allyesconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- parisc-defconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- parisc-randconfig-r073-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- parisc64-defconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- powerpc-allnoconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- powerpc-randconfig-r063-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- powerpc-randconfig-r064-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- powerpc-sam440ep_defconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- powerpc64-randconfig-r061-20260522
| |-- arch-powerpc-kernel-pci_64.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- arch-powerpc-kernel-rtas.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- arch-powerpc-kernel-signal_32.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- arch-powerpc-kernel-signal_64.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- arch-powerpc-kernel-sys_ppc32.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| `-- arch-powerpc-kernel-syscalls.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
|-- powerpc64-randconfig-r131-20260521
| |-- lib-raid-raid6-powerpc-altivec1.c:sparse:sparse:Trying-to-use-reserved-word-signed-as-identifier
| |-- lib-raid-raid6-powerpc-altivec1.c:sparse:sparse:two-or-more-data-types-in-declaration-specifiers
| |-- lib-raid-raid6-powerpc-altivec2.c:sparse:sparse:Trying-to-use-reserved-word-signed-as-identifier
| |-- lib-raid-raid6-powerpc-altivec2.c:sparse:sparse:two-or-more-data-types-in-declaration-specifiers
| |-- lib-raid-raid6-powerpc-altivec4.c:sparse:sparse:Trying-to-use-reserved-word-signed-as-identifier
| |-- lib-raid-raid6-powerpc-altivec4.c:sparse:sparse:two-or-more-data-types-in-declaration-specifiers
| |-- lib-raid-raid6-powerpc-altivec8.c:sparse:sparse:Trying-to-use-reserved-word-signed-as-identifier
| `-- lib-raid-raid6-powerpc-altivec8.c:sparse:sparse:two-or-more-data-types-in-declaration-specifiers
|-- riscv-allnoconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- riscv-allyesconfig
| |-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
| `-- drivers-gpu-drm-scheduler-tests-tests_scheduler.c:error:initializer-element-is-not-a-compile-time-constant
|-- riscv-defconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- riscv-randconfig-001-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- riscv-randconfig-002
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- riscv-randconfig-002-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- riscv-randconfig-r131-20260521
| |-- arch-riscv-kernel-sys_hwprobe.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- arch-riscv-kernel-sys_riscv.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| `-- ld.lld:error:call-to-__compiletime_assert_NNN-marked-dontcall-error:BUILD_BUG_ON-failed:HWEIGHT32(-(VALID_OPENAT2_FLAGS-(O_NONBLOCK-O_NDELAY))-__FMODE_EXEC)
|-- s390-allmodconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- s390-allnoconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- s390-defconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- s390-randconfig-001
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- s390-randconfig-001-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- s390-randconfig-002-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- s390-randconfig-r064-20260522
| `-- drivers-tty-serial-max31.c:error:incompatible-pointer-types-passing-struct-i2c_driver-to-parameter-of-type-struct-spi_driver
|-- sh-allmodconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- sh-allnoconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- sh-allyesconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- sh-defconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- sh-randconfig-001
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- sh-randconfig-001-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- sh-randconfig-002
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- sh-randconfig-002-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- sparc-allnoconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- sparc-defconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- sparc-randconfig-001
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- sparc-randconfig-001-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- sparc-randconfig-002
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- sparc-randconfig-002-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- sparc64-allmodconfig
| |-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
| |-- arch-sparc-kernel-sys_sparc32.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- arch-sparc-kernel-sys_sparc_64.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- block-ioprio.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-aio.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-d_path.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-eventfd.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-eventpoll.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-exec.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-fcntl.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-fhandle.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-file.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-file_attr.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-fsopen.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-ioctl.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-locks.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-namei.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-namespace.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-notify-inotify-inotify_user.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-open.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-pipe.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-read_write.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-readdir.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-select.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-signalfd.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-splice.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-stat.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-statfs.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-sync.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-timerfd.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-utimes.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-xattr.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- ipc-msg.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- ipc-sem.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- ipc-shm.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-capability.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-events-core.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-exec_domain.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-exit.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-fork.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-futex-syscalls.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-groups.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-kcmp.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-module-main.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-nsproxy.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-nstree.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-pid.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-printk-printk.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-ptrace.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-reboot.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-sched-membarrier.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-sched-syscalls.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-seccomp.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-signal.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-sys.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-time-hrtimer.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-time-itimer.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-time-posix-timers.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-time-time.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-uid16.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-fadvise.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-filemap.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-madvise.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-memfd.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-mincore.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-mlock.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-mmap.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-mprotect.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-mremap.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-msync.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-oom_kill.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-process_vm_access.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-readahead.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-swapfile.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- net-socket.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- security-keys-compat.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- security-landlock-syscalls.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| `-- security-lsm_syscalls.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
|-- sparc64-defconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- sparc64-randconfig-001
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- sparc64-randconfig-001-20260521
| |-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
| `-- drivers-tty-serial-max31.c:error:max31_spi_driver-undeclared-(first-use-in-this-function)
|-- sparc64-randconfig-002
| |-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
| |-- arch-sparc-kernel-sys_sparc32.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- arch-sparc-kernel-sys_sparc_64.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- block-ioprio.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-aio.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-d_path.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-eventfd.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-eventpoll.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-exec.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-fcntl.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-fhandle.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-file.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-file_attr.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-fsopen.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-ioctl.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-locks.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-namei.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-namespace.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-notify-inotify-inotify_user.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-open.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-pipe.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-read_write.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-readdir.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-select.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-signalfd.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-splice.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-stat.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-statfs.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-sync.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-timerfd.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-utimes.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-xattr.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-capability.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-events-core.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-exec_domain.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-exit.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-fork.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-futex-syscalls.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-groups.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-kcmp.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-nsproxy.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-nstree.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-pid.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-printk-printk.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-ptrace.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-reboot.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-sched-membarrier.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-sched-syscalls.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-seccomp.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-signal.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-sys.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-time-hrtimer.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-time-itimer.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-time-posix-timers.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-time-time.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-uid16.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-fadvise.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-filemap.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-madvise.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-mincore.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-mlock.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-mmap.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-mprotect.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-mremap.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-msync.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-oom_kill.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-process_vm_access.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-readahead.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- net-socket.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- security-keys-compat.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- security-keys-keyctl.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| `-- security-lsm_syscalls.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
|-- sparc64-randconfig-002-20260521
| |-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
| `-- drivers-tty-serial-max31.c:error:max31_spi_driver-undeclared-(first-use-in-this-function)
|-- um-allmodconfig
| |-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
| |-- drivers-gpu-drm-amd-amdgpu-..-amdkfd-kfd_crat.c:error:call-to-undeclared-function-cpu_data-ISO-C99-and-later-do-not-support-implicit-function-declarations
| |-- drivers-gpu-drm-amd-amdgpu-..-amdkfd-kfd_crat.c:error:cannot-take-the-address-of-an-rvalue-of-type-int
| |-- drivers-gpu-drm-amd-amdgpu-..-amdkfd-kfd_crat.c:error:incomplete-definition-of-type-struct-cpuinfo_x86
| |-- drivers-gpu-drm-amd-amdgpu-..-amdkfd-kfd_crat.c:error:use-of-undeclared-identifier-X86_VENDOR_AMD
| |-- drivers-gpu-drm-amd-amdgpu-..-amdkfd-kfd_topology.c:error:call-to-undeclared-function-cpu_data-ISO-C99-and-later-do-not-support-implicit-function-declarations
| `-- drivers-gpu-drm-amd-amdgpu-..-amdkfd-kfd_topology.c:error:member-reference-base-type-int-is-not-a-structure-or-union
|-- um-allnoconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- um-allyesconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- um-defconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- um-i386_defconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- um-randconfig-001
| |-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
| |-- block-ioprio.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-d_path.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-eventfd.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-eventpoll.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-exec.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-fcntl.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-fhandle.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-file.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-file_attr.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-fsopen.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-ioctl.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-namei.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-namespace.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-open.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-pipe.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-read_write.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-readdir.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-select.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-splice.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-stat.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-statfs.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-sync.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-timerfd.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-utimes.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-xattr.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-exec_domain.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-exit.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-fork.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-kcmp.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-nsproxy.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-nstree.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-pid.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-printk-printk.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-ptrace.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-reboot.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-sched-syscalls.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-signal.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-sys.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-time-hrtimer.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-time-posix-stubs.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-time-time.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-mincore.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-mlock.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-mmap.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-mprotect.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-mremap.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-msync.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-oom_kill.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-process_vm_access.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-readahead.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- net-socket.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| `-- security-keys-keyctl.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
|-- um-randconfig-001-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- um-randconfig-002
| |-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
| |-- arch-x86-um-syscalls_64.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- block-ioprio.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-aio.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-d_path.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-eventfd.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-eventpoll.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-exec.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-fcntl.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-fhandle.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-file.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-file_attr.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-fsopen.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-ioctl.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-locks.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-namei.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-namespace.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-notify-inotify-inotify_user.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-open.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-pipe.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-read_write.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-readdir.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-select.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-signalfd.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-splice.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-stat.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-statfs.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-sync.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-timerfd.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-utimes.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- fs-xattr.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-capability.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-exec_domain.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-exit.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-fork.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-futex-syscalls.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-groups.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-module-main.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-nsproxy.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-nstree.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-pid.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-printk-printk.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-ptrace.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-reboot.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-sched-membarrier.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-sched-syscalls.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-seccomp.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-signal.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-sys.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-time-hrtimer.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-time-itimer.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-time-posix-timers.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-time-time.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- kernel-uid16.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-fadvise.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-filemap.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-madvise.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-mincore.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-mlock.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-mmap.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-mprotect.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-mremap.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-msync.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-oom_kill.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-process_vm_access.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-readahead.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| |-- mm-swapfile.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
| `-- security-keys-keyctl.c:error:unknown-warning-group-Wattribute-alias-ignored-Werror-Wunknown-warning-option
|-- um-randconfig-002-20260521
| |-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
| |-- drivers-tty-serial-max31.c:error:max31_spi_driver-undeclared-(first-use-in-this-function)
| |-- usr-bin-ld:sound-soc-codecs-es9356.o:(.rodata):undefined-reference-to-sdca_asoc_q78_get_volsw
| `-- usr-bin-ld:sound-soc-codecs-es9356.o:(.rodata):undefined-reference-to-sdca_asoc_q78_put_volsw
|-- um-randconfig-r053-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- um-x86_64_defconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- x86_64-allnoconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- x86_64-buildonly-randconfig-002-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- x86_64-buildonly-randconfig-003-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- x86_64-buildonly-randconfig-004-20260521
| |-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
| |-- drivers-gpu-drm-amd-amdgpu-jpeg_v2_5.c:warning:d-directive-output-may-be-truncated-writing-between-and-bytes-into-a-region-of-size
| |-- drivers-pinctrl-pinctrl-generic.c:error:conflicting-types-for-pinctrl_generic_to_map-have-int(struct-pinctrl_dev-struct-device_node-struct-device_node-struct-pinctrl_map-unsigned-int-unsigned-int-cons
| |-- drivers-pinctrl-pinctrl-generic.c:error:redefinition-of-pinctrl_generic_pins_function_dt_node_to_map
| `-- drivers-tty-serial-max31.c:error:max31_spi_driver-undeclared-(first-use-in-this-function)
|-- x86_64-buildonly-randconfig-005-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- x86_64-defconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- x86_64-kexec
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- x86_64-randconfig-001-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- x86_64-randconfig-002-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- x86_64-randconfig-004-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- x86_64-randconfig-006-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- x86_64-randconfig-011-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- x86_64-randconfig-012-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- x86_64-randconfig-013-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- x86_64-randconfig-014-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- x86_64-randconfig-015-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- x86_64-randconfig-016-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- x86_64-randconfig-071
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- x86_64-randconfig-071-20260521
| |-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
| `-- drivers-pinctrl-pinctrl-generic.c:error:redefinition-of-pinctrl_generic_pins_function_dt_node_to_map
|-- x86_64-randconfig-072
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- x86_64-randconfig-072-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- x86_64-randconfig-073-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- x86_64-randconfig-074
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- x86_64-randconfig-074-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- x86_64-randconfig-075
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- x86_64-randconfig-076
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- x86_64-randconfig-076-20260521
| `-- drivers-pinctrl-pinctrl-generic.c:error:redefinition-of-pinctrl_generic_pins_function_dt_node_to_map
|-- x86_64-randconfig-101
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- x86_64-randconfig-101-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- x86_64-randconfig-102
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- x86_64-randconfig-102-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- x86_64-randconfig-103
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- x86_64-randconfig-104
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- x86_64-randconfig-104-20260521
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- x86_64-randconfig-121-20260522
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- x86_64-randconfig-122-20260522
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- x86_64-randconfig-123-20260522
| |-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
| `-- drivers-pinctrl-pinctrl-generic.c:error:redefinition-of-pinctrl_generic_pins_function_dt_node_to_map
|-- x86_64-randconfig-161
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- x86_64-rhel-9.4
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- x86_64-rhel-9.4-bpf
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- x86_64-rhel-9.4-func
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- x86_64-rhel-9.4-kselftests
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- x86_64-rhel-9.4-kunit
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- x86_64-rhel-9.4-ltp
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- xtensa-allnoconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- xtensa-allyesconfig
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- xtensa-randconfig-001
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
|-- xtensa-randconfig-001-20260521
| |-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
| `-- drivers-tty-serial-max31.c:error:max31_spi_driver-undeclared-(first-use-in-this-function)
|-- xtensa-randconfig-002
| `-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
`-- xtensa-randconfig-002-20260521
`-- Warning:block-blk-map.c-Excess-function-parameter-op-description-in-bio_copy_kern
elapsed time: 724m
configs tested: 282
configs skipped: 11
tested configs:
alpha allnoconfig gcc-15.2.0
alpha allyesconfig gcc-15.2.0
alpha defconfig gcc-15.2.0
arc allmodconfig clang-16
arc allmodconfig gcc-15.2.0
arc allnoconfig gcc-15.2.0
arc allyesconfig clang-23
arc allyesconfig gcc-15.2.0
arc defconfig gcc-15.2.0
arc randconfig-001 gcc-8.5.0
arc randconfig-001-20260521 gcc-13.4.0
arc randconfig-001-20260521 gcc-8.5.0
arc randconfig-002 gcc-8.5.0
arc randconfig-002-20260521 gcc-12.5.0
arc randconfig-002-20260521 gcc-8.5.0
arm allnoconfig clang-23
arm allnoconfig gcc-15.2.0
arm allyesconfig clang-16
arm allyesconfig gcc-15.2.0
arm defconfig clang-23
arm defconfig gcc-15.2.0
arm randconfig-001 gcc-8.5.0
arm randconfig-001-20260521 clang-23
arm randconfig-001-20260521 gcc-8.5.0
arm randconfig-002 gcc-11.5.0
arm randconfig-002-20260521 gcc-12.5.0
arm randconfig-002-20260521 gcc-8.5.0
arm randconfig-003 clang-20
arm randconfig-003-20260521 gcc-13.4.0
arm randconfig-003-20260521 gcc-8.5.0
arm randconfig-004 gcc-14.3.0
arm randconfig-004-20260521 gcc-8.5.0
arm64 allmodconfig clang-19
arm64 allmodconfig clang-23
arm64 allnoconfig gcc-15.2.0
arm64 defconfig gcc-15.2.0
arm64 randconfig-001-20260521 clang-23
arm64 randconfig-001-20260521 gcc-8.5.0
arm64 randconfig-002-20260521 gcc-8.5.0
arm64 randconfig-003-20260521 gcc-8.5.0
arm64 randconfig-004-20260521 gcc-8.5.0
csky allmodconfig gcc-15.2.0
csky allnoconfig gcc-15.2.0
csky defconfig gcc-15.2.0
csky randconfig-001-20260521 gcc-15.2.0
csky randconfig-001-20260521 gcc-8.5.0
csky randconfig-002-20260521 gcc-15.2.0
csky randconfig-002-20260521 gcc-8.5.0
hexagon allmodconfig clang-17
hexagon allmodconfig gcc-15.2.0
hexagon allnoconfig clang-23
hexagon allnoconfig gcc-15.2.0
hexagon defconfig clang-23
hexagon defconfig gcc-15.2.0
hexagon randconfig-001 gcc-11.5.0
hexagon randconfig-001-20260521 clang-23
hexagon randconfig-001-20260521 gcc-11.5.0
hexagon randconfig-002 gcc-11.5.0
hexagon randconfig-002-20260521 clang-23
hexagon randconfig-002-20260521 gcc-11.5.0
i386 allmodconfig clang-20
i386 allmodconfig gcc-14
i386 allnoconfig gcc-14
i386 allnoconfig gcc-15.2.0
i386 allyesconfig clang-20
i386 allyesconfig gcc-14
i386 buildonly-randconfig-001 clang-20
i386 buildonly-randconfig-001-20260521 clang-20
i386 buildonly-randconfig-001-20260522 clang-20
i386 buildonly-randconfig-002 clang-20
i386 buildonly-randconfig-002-20260521 clang-20
i386 buildonly-randconfig-002-20260522 gcc-14
i386 buildonly-randconfig-003 clang-20
i386 buildonly-randconfig-003-20260521 clang-20
i386 buildonly-randconfig-003-20260522 clang-20
i386 buildonly-randconfig-004 clang-20
i386 buildonly-randconfig-004-20260521 clang-20
i386 buildonly-randconfig-004-20260522 gcc-14
i386 buildonly-randconfig-005 clang-20
i386 buildonly-randconfig-005-20260521 clang-20
i386 buildonly-randconfig-005-20260522 clang-20
i386 buildonly-randconfig-006 clang-20
i386 buildonly-randconfig-006-20260521 clang-20
i386 buildonly-randconfig-006-20260522 gcc-13
i386 defconfig clang-20
i386 defconfig gcc-15.2.0
i386 randconfig-001-20260521 clang-20
i386 randconfig-002-20260521 gcc-14
i386 randconfig-003-20260521 clang-20
i386 randconfig-004-20260521 gcc-14
i386 randconfig-005-20260521 clang-20
i386 randconfig-006-20260521 clang-20
i386 randconfig-007-20260521 clang-20
i386 randconfig-011-20260521 gcc-14
i386 randconfig-012-20260521 clang-20
i386 randconfig-013-20260521 gcc-13
i386 randconfig-014-20260521 gcc-14
i386 randconfig-015-20260521 gcc-14
i386 randconfig-016-20260521 clang-20
i386 randconfig-017-20260521 clang-20
loongarch allmodconfig clang-19
loongarch allmodconfig clang-23
loongarch allnoconfig clang-23
loongarch allnoconfig gcc-15.2.0
loongarch defconfig clang-19
loongarch randconfig-001 gcc-11.5.0
loongarch randconfig-001-20260521 gcc-11.5.0
loongarch randconfig-001-20260521 gcc-12.5.0
loongarch randconfig-002 gcc-11.5.0
loongarch randconfig-002-20260521 gcc-11.5.0
loongarch randconfig-002-20260521 gcc-15.2.0
m68k allmodconfig gcc-15.2.0
m68k allnoconfig gcc-15.2.0
m68k allyesconfig clang-16
m68k allyesconfig gcc-15.2.0
m68k defconfig clang-19
m68k defconfig gcc-15.2.0
microblaze allnoconfig gcc-15.2.0
microblaze allyesconfig gcc-15.2.0
microblaze defconfig clang-19
microblaze defconfig gcc-15.2.0
mips allmodconfig gcc-15.2.0
mips allnoconfig gcc-15.2.0
mips allyesconfig gcc-15.2.0
nios2 allmodconfig clang-23
nios2 allmodconfig gcc-11.5.0
nios2 allnoconfig clang-23
nios2 allnoconfig gcc-11.5.0
nios2 defconfig clang-19
nios2 defconfig gcc-11.5.0
nios2 randconfig-001 gcc-11.5.0
nios2 randconfig-001-20260521 gcc-11.5.0
nios2 randconfig-002 gcc-11.5.0
nios2 randconfig-002-20260521 gcc-11.5.0
openrisc allmodconfig clang-23
openrisc allmodconfig gcc-15.2.0
openrisc allnoconfig clang-23
openrisc allnoconfig gcc-15.2.0
openrisc defconfig gcc-15.2.0
parisc allmodconfig gcc-15.2.0
parisc allnoconfig clang-23
parisc allnoconfig gcc-15.2.0
parisc allyesconfig clang-19
parisc allyesconfig gcc-15.2.0
parisc defconfig gcc-15.2.0
parisc randconfig-001-20260521 gcc-12.5.0
parisc randconfig-002-20260521 gcc-15.2.0
parisc64 defconfig clang-19
parisc64 defconfig gcc-15.2.0
powerpc allmodconfig gcc-15.2.0
powerpc allnoconfig clang-23
powerpc allnoconfig gcc-15.2.0
powerpc randconfig-001-20260521 clang-23
powerpc randconfig-002-20260521 clang-17
powerpc sam440ep_defconfig gcc-15.2.0
powerpc64 randconfig-001-20260521 clang-23
powerpc64 randconfig-002-20260521 gcc-12.5.0
riscv allmodconfig clang-23
riscv allnoconfig clang-23
riscv allnoconfig gcc-15.2.0
riscv allyesconfig clang-16
riscv defconfig gcc-15.2.0
riscv randconfig-001 gcc-15.2.0
riscv randconfig-001-20260521 clang-23
riscv randconfig-001-20260521 gcc-15.2.0
riscv randconfig-002 gcc-15.2.0
riscv randconfig-002-20260521 gcc-13.4.0
riscv randconfig-002-20260521 gcc-15.2.0
s390 allmodconfig clang-18
s390 allmodconfig clang-19
s390 allnoconfig clang-23
s390 allyesconfig gcc-15.2.0
s390 defconfig gcc-15.2.0
s390 randconfig-001 gcc-15.2.0
s390 randconfig-001-20260521 gcc-15.2.0
s390 randconfig-001-20260521 gcc-8.5.0
s390 randconfig-002 gcc-15.2.0
s390 randconfig-002-20260521 clang-17
s390 randconfig-002-20260521 gcc-15.2.0
sh allmodconfig gcc-15.2.0
sh allnoconfig clang-23
sh allnoconfig gcc-15.2.0
sh allyesconfig clang-19
sh allyesconfig gcc-15.2.0
sh defconfig gcc-14
sh defconfig gcc-15.2.0
sh randconfig-001 gcc-15.2.0
sh randconfig-001-20260521 gcc-15.2.0
sh randconfig-002 gcc-15.2.0
sh randconfig-002-20260521 gcc-12.5.0
sh randconfig-002-20260521 gcc-15.2.0
sh rsk7264_defconfig gcc-15.2.0
sparc allnoconfig clang-23
sparc allnoconfig gcc-15.2.0
sparc defconfig gcc-15.2.0
sparc randconfig-001 gcc-8.5.0
sparc randconfig-001-20260521 gcc-8.5.0
sparc randconfig-002 gcc-8.5.0
sparc randconfig-002-20260521 gcc-8.5.0
sparc64 allmodconfig clang-23
sparc64 defconfig clang-20
sparc64 defconfig gcc-14
sparc64 randconfig-001 gcc-8.5.0
sparc64 randconfig-001-20260521 gcc-8.5.0
sparc64 randconfig-002 gcc-8.5.0
sparc64 randconfig-002-20260521 gcc-8.5.0
um allmodconfig clang-19
um allnoconfig clang-23
um allyesconfig gcc-14
um allyesconfig gcc-15.2.0
um defconfig clang-23
um defconfig gcc-14
um i386_defconfig gcc-14
um randconfig-001 gcc-8.5.0
um randconfig-001-20260521 gcc-14
um randconfig-001-20260521 gcc-8.5.0
um randconfig-002 gcc-8.5.0
um randconfig-002-20260521 gcc-14
um randconfig-002-20260521 gcc-8.5.0
um x86_64_defconfig clang-23
um x86_64_defconfig gcc-14
x86_64 allmodconfig clang-20
x86_64 allnoconfig clang-20
x86_64 allnoconfig clang-23
x86_64 allyesconfig clang-20
x86_64 buildonly-randconfig-001-20260521 clang-20
x86_64 buildonly-randconfig-001-20260521 gcc-12
x86_64 buildonly-randconfig-002-20260521 clang-20
x86_64 buildonly-randconfig-002-20260521 gcc-14
x86_64 buildonly-randconfig-003-20260521 clang-20
x86_64 buildonly-randconfig-004-20260521 clang-20
x86_64 buildonly-randconfig-004-20260521 gcc-14
x86_64 buildonly-randconfig-005-20260521 clang-20
x86_64 buildonly-randconfig-006-20260521 clang-20
x86_64 defconfig gcc-14
x86_64 kexec clang-20
x86_64 randconfig-001-20260521 clang-20
x86_64 randconfig-002-20260521 clang-20
x86_64 randconfig-003-20260521 clang-20
x86_64 randconfig-003-20260521 gcc-14
x86_64 randconfig-004-20260521 clang-20
x86_64 randconfig-005-20260521 clang-20
x86_64 randconfig-006-20260521 clang-20
x86_64 randconfig-011-20260521 clang-20
x86_64 randconfig-011-20260521 gcc-14
x86_64 randconfig-012-20260521 clang-20
x86_64 randconfig-012-20260521 gcc-14
x86_64 randconfig-013-20260521 clang-20
x86_64 randconfig-013-20260521 gcc-14
x86_64 randconfig-014-20260521 clang-20
x86_64 randconfig-014-20260521 gcc-14
x86_64 randconfig-015-20260521 clang-20
x86_64 randconfig-015-20260521 gcc-14
x86_64 randconfig-016-20260521 gcc-14
x86_64 randconfig-071 gcc-14
x86_64 randconfig-071-20260521 clang-20
x86_64 randconfig-072 gcc-14
x86_64 randconfig-072-20260521 clang-20
x86_64 randconfig-073 clang-20
x86_64 randconfig-073-20260521 clang-20
x86_64 randconfig-074 gcc-14
x86_64 randconfig-074-20260521 gcc-14
x86_64 randconfig-075 gcc-13
x86_64 randconfig-075-20260521 clang-20
x86_64 randconfig-076 clang-20
x86_64 randconfig-076-20260521 clang-20
x86_64 rhel-9.4 clang-20
x86_64 rhel-9.4-bpf gcc-14
x86_64 rhel-9.4-func clang-20
x86_64 rhel-9.4-kselftests clang-20
x86_64 rhel-9.4-kunit gcc-14
x86_64 rhel-9.4-ltp gcc-14
x86_64 rhel-9.4-rust clang-20
xtensa allnoconfig clang-23
xtensa allnoconfig gcc-15.2.0
xtensa allyesconfig clang-23
xtensa allyesconfig gcc-15.2.0
xtensa randconfig-001 gcc-8.5.0
xtensa randconfig-001-20260521 gcc-8.5.0
xtensa randconfig-002 gcc-8.5.0
xtensa randconfig-002-20260521 gcc-11.5.0
xtensa randconfig-002-20260521 gcc-8.5.0
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
^ permalink raw reply
* Re: [PATCHv3] blk-mq: pop cached request if it is usable
From: Ming Lei @ 2026-05-21 23:33 UTC (permalink / raw)
To: Keith Busch; +Cc: axboe, hch, linux-block, Keith Busch
In-Reply-To: <20260521190253.242065-1-kbusch@meta.com>
On Thu, May 21, 2026 at 12:02:53PM -0700, Keith Busch wrote:
> From: Keith Busch <kbusch@kernel.org>
>
> When submitting a bio to blk-mq, if the task should sleep after peeking
> a cached request, but before it pops it, the plug flushes and calls
> blk_mq_free_plug_rqs, freeing the cached_rqs. This creates a
> use-after-free bug. Fix this by popping the cached request before any
> possible blocking calls if it is suitable for use.
>
> Popping this request first holds a queue reference, so avoid any
> serialization races with queue freezes and can safely proceed with
> dispatching that request to the driver. This potentially increases a
> timing window from when a driver wants to freeze its queue to when
> requests stop being dispatched. That scenario is off the fast path
> though, and drivers need to appropriately handle requests during a
> freeze request anyway.
>
> The downside is the popped element needs to be individually freed when
> we performed a bio plug merge. The cached request would have had to be
> freed later anyway, but this patch does it inline with building the plug
> list instead of after flushing it.
>
> Fixes: b0077e269f6c1 ("blk-mq: make sure active queue usage is held for bio_integrity_prep()")
> Fixes: 7b4f36cd22a65 ("block: ensure we hold a queue reference when using queue limits")
> Signed-off-by: Keith Busch <kbusch@kernel.org>
> ---
> v2->v3:
>
> This pops the cached requests first. It's simpler this way and I don't
> see any strong reason against it.
Reviewed-by: Ming Lei <tom.leiming@gmail.com>
BTW, as mentioned in v2, the request may be added back in case of merge,
but seems not a big deal given blk_mq_free_plug_rqs() doesn't free requests
in batch.
Thanks,
Ming
^ permalink raw reply
* [PATCH v15 8/8] docs: add io_queue flag to isolcpus
From: Aaron Tomlin @ 2026-05-21 23:29 UTC (permalink / raw)
To: axboe, kbusch, hch, sagi, mst
Cc: atomlin, aacraid, James.Bottomley, martin.petersen, liyihang9,
kashyap.desai, sumit.saxena, shivasharan.srikanteshwara,
chandrakanth.patil, sathya.prakash, sreekanth.reddy,
suganath-prabu.subramani, ranjan.kumar, jinpu.wang, tglx, mingo,
peterz, juri.lelli, vincent.guittot, akpm, maz, ruanjinjie,
bigeasy, yphbchou0911, wagi, frederic, longman, chenridong, hare,
kch, ming.lei, tom.leiming, steve, sean, chjohnst, neelx, mproche,
nick.lange, marco.crivellari, rishil1999, linux-block,
linux-kernel
In-Reply-To: <20260521232956.553287-1-atomlin@atomlin.com>
From: Daniel Wagner <wagi@kernel.org>
The io_queue flag informs multiqueue device drivers where to place
hardware queues. Document this new flag in the isolcpus
command-line argument description.
Signed-off-by: Daniel Wagner <wagi@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
[atomlin:
- Refined io_queue kernel parameter documentation
- Removed an inaccurate claim in the documentation stating
that io_queue takes precedence over managed_irq]
Signed-off-by: Aaron Tomlin <atomlin@atomlin.com>
---
.../admin-guide/kernel-parameters.txt | 26 ++++++++++++++++++-
1 file changed, 25 insertions(+), 1 deletion(-)
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 4d0f545fb3ec..fb828bb60b9e 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -2792,7 +2792,6 @@ Kernel parameters
"number of CPUs in system - 1".
managed_irq
-
Isolate from being targeted by managed interrupts
which have an interrupt mask containing isolated
CPUs. The affinity of managed interrupts is
@@ -2815,6 +2814,31 @@ Kernel parameters
housekeeping CPUs has no influence on those
queues.
+ io_queue
+ Applicable to managed IRQs only. Restrict
+ multiqueue hardware queue allocation to online
+ housekeeping CPUs. This guarantees that all
+ managed hardware completion interrupts are routed
+ exclusively to housekeeping cores, shielding
+ isolated CPUs from I/O interruptions even if they
+ initiated the request.
+
+ Note: Using io_queue restricts the number of
+ allocated hardware queues to match the number of
+ housekeeping CPUs. This prevents MSI-X vector
+ exhaustion and forces isolated CPUs to share
+ submission queues.
+
+ Note: Offlining housekeeping CPUs which serve
+ isolated CPUs will fail. The isolated CPUs must
+ be offlined before offlining the housekeeping
+ CPUs.
+
+ Note: When I/O is submitted by an application on
+ an isolated CPU, the hardware completion
+ interrupt is handled entirely by a housekeeping
+ CPU.
+
The format of <cpu-list> is described above.
iucv= [HW,NET]
--
2.51.0
^ permalink raw reply related
* [PATCH v15 7/8] genirq/affinity: Restrict managed IRQ affinity to housekeeping CPUs
From: Aaron Tomlin @ 2026-05-21 23:29 UTC (permalink / raw)
To: axboe, kbusch, hch, sagi, mst
Cc: atomlin, aacraid, James.Bottomley, martin.petersen, liyihang9,
kashyap.desai, sumit.saxena, shivasharan.srikanteshwara,
chandrakanth.patil, sathya.prakash, sreekanth.reddy,
suganath-prabu.subramani, ranjan.kumar, jinpu.wang, tglx, mingo,
peterz, juri.lelli, vincent.guittot, akpm, maz, ruanjinjie,
bigeasy, yphbchou0911, wagi, frederic, longman, chenridong, hare,
kch, ming.lei, tom.leiming, steve, sean, chjohnst, neelx, mproche,
nick.lange, marco.crivellari, rishil1999, linux-block,
linux-kernel
In-Reply-To: <20260521232956.553287-1-atomlin@atomlin.com>
At present, the managed interrupt spreading algorithm distributes vectors
across all available CPUs within a given node or system. On systems
employing CPU isolation (e.g., "isolcpus=io_queue"), this behaviour
defeats the primary purpose of isolation by routing hardware interrupts
(such as NVMe completion queues) directly to isolated cores.
Update irq_create_affinity_masks() to respect the housekeeping CPU mask.
By passing the HK_TYPE_IO_QUEUE mask directly to the topological
distribution function (group_mask_cpus_evenly()), we ensure that managed
interrupts are kept strictly off isolated CPUs.
This patch additionally addresses the architectural constraints of
restricted vector distribution:
1. Vector Limits and Overrides: Updated irq_calc_affinity_vectors()
to strictly bound the maximum number of allocated vectors to the
weight of the housekeeping mask. This correctly overrides
drivers providing a calc_sets() callback, preventing them from
wasting memory on dead hardware queues that cannot be routed to
isolated CPUs.
2. Multi-set Alignment and Leak Prevention: When isolation
constraints result in fewer available masks than requested
vectors for a given set, the remaining vector slots are padded
with the housekeeping mask. This replaces the historical
irq_default_affinity padding, ensuring excess managed queues do
not leak interrupts onto isolated CPUs.
3. Minimum Vector Safety Net: To prevent fatal -ENOSPC device probe
aborts on heavily isolated systems (where the housekeeping CPU
count might be lower than a device's structural minimum), the
final vector calculation is safeguarded to never drop below
minvec. Queues will safely share the available housekeeping CPUs
instead of failing the probe.
4. Zero Overhead: The housekeeping mask is conditionally assigned
via a direct pointer, completely avoiding temporary mask
allocations (e.g., alloc_cpumask_var) and bitwise operations
when CPU isolation is disabled. This guarantees zero performance
or memory overhead for standard configurations.
Signed-off-by: Aaron Tomlin <atomlin@atomlin.com>
---
kernel/irq/affinity.c | 31 +++++++++++++++++++++++--------
1 file changed, 23 insertions(+), 8 deletions(-)
diff --git a/kernel/irq/affinity.c b/kernel/irq/affinity.c
index 78f2418a8925..dade92f8b4b3 100644
--- a/kernel/irq/affinity.c
+++ b/kernel/irq/affinity.c
@@ -8,6 +8,7 @@
#include <linux/slab.h>
#include <linux/cpu.h>
#include <linux/group_cpus.h>
+#include <linux/sched/isolation.h>
static void default_calc_sets(struct irq_affinity *affd, unsigned int affvecs)
{
@@ -25,8 +26,10 @@ static void default_calc_sets(struct irq_affinity *affd, unsigned int affvecs)
struct irq_affinity_desc *
irq_create_affinity_masks(unsigned int nvecs, struct irq_affinity *affd)
{
- unsigned int affvecs, curvec, usedvecs, i;
+ unsigned int affvecs, curvec, usedvecs, i, j;
struct irq_affinity_desc *masks = NULL;
+ const struct cpumask *hk_mask = housekeeping_cpumask(HK_TYPE_IO_QUEUE);
+ bool hk_enabled = housekeeping_enabled(HK_TYPE_IO_QUEUE);
/*
* Determine the number of vectors which need interrupt affinities
@@ -70,19 +73,29 @@ irq_create_affinity_masks(unsigned int nvecs, struct irq_affinity *affd)
*/
for (i = 0, usedvecs = 0; i < affd->nr_sets; i++) {
unsigned int nr_masks, this_vecs = affd->set_size[i];
- struct cpumask *result = group_cpus_evenly(this_vecs, &nr_masks);
+ struct cpumask *result;
+ const struct cpumask *mask;
+ if (hk_enabled)
+ mask = hk_mask;
+ else
+ mask = cpu_possible_mask;
+
+ result = group_mask_cpus_evenly(this_vecs, mask,
+ &nr_masks);
if (!result) {
kfree(masks);
return NULL;
}
-
- for (int j = 0; j < nr_masks; j++)
+ for (j = 0; j < nr_masks; j++)
cpumask_copy(&masks[curvec + j].mask, &result[j]);
+ for (j = nr_masks; j < this_vecs; j++)
+ cpumask_copy(&masks[curvec + j].mask, mask);
+
kfree(result);
- curvec += nr_masks;
- usedvecs += nr_masks;
+ curvec += this_vecs;
+ usedvecs += this_vecs;
}
/* Fill out vectors at the end that don't need affinity */
@@ -115,10 +128,12 @@ unsigned int irq_calc_affinity_vectors(unsigned int minvec, unsigned int maxvec,
if (resv > minvec)
return 0;
- if (affd->calc_sets)
+ if (housekeeping_enabled(HK_TYPE_IO_QUEUE))
+ set_vecs = cpumask_weight(housekeeping_cpumask(HK_TYPE_IO_QUEUE));
+ else if (affd->calc_sets)
set_vecs = maxvec - resv;
else
set_vecs = cpumask_weight(cpu_possible_mask);
- return resv + min(set_vecs, maxvec - resv);
+ return max(minvec, resv + min(set_vecs, maxvec - resv));
}
--
2.51.0
^ permalink raw reply related
* [PATCH v15 6/8] blk-mq: prevent offlining hk CPUs with associated online isolated CPUs
From: Aaron Tomlin @ 2026-05-21 23:29 UTC (permalink / raw)
To: axboe, kbusch, hch, sagi, mst
Cc: atomlin, aacraid, James.Bottomley, martin.petersen, liyihang9,
kashyap.desai, sumit.saxena, shivasharan.srikanteshwara,
chandrakanth.patil, sathya.prakash, sreekanth.reddy,
suganath-prabu.subramani, ranjan.kumar, jinpu.wang, tglx, mingo,
peterz, juri.lelli, vincent.guittot, akpm, maz, ruanjinjie,
bigeasy, yphbchou0911, wagi, frederic, longman, chenridong, hare,
kch, ming.lei, tom.leiming, steve, sean, chjohnst, neelx, mproche,
nick.lange, marco.crivellari, rishil1999, linux-block,
linux-kernel
In-Reply-To: <20260521232956.553287-1-atomlin@atomlin.com>
From: Daniel Wagner <wagi@kernel.org>
When isolcpus=io_queue is enabled and the last housekeeping CPU
for a given hctx goes offline, no CPU would be left to handle I/O.
To prevent I/O stalls, disallow offlining housekeeping CPUs that are
still serving isolated CPUs.
Signed-off-by: Daniel Wagner <wagi@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
[atomlin:
- Removed duplicate paragraph from commit message
- Allow offlining of non-housekeeping CPUs
- Fix logic flaw that prematurely rejected valid offline requests
- Iterated over cpu_online_mask and manually reverse-mapped CPUs to
correctly detect isolated CPUs, as blk_mq_map_swqueue()
intentionally prunes them from hctx->cpumask
- Drop hctx->queue->disk->disk_name from warning to avoid UAF bug
- Ensure isolation constraints are only enforced for CPUs actively
mapped to the evaluated hardware queue
- Correct pr_warn format specifier]
Signed-off-by: Aaron Tomlin <atomlin@atomlin.com>
---
block/blk-mq.c | 55 ++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 55 insertions(+)
diff --git a/block/blk-mq.c b/block/blk-mq.c
index d0c37daf568f..7c3f4d6546f0 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -3739,6 +3739,56 @@ static bool blk_mq_hctx_has_requests(struct blk_mq_hw_ctx *hctx)
return data.has_rq;
}
+static bool blk_mq_hctx_can_offline_hk_cpu(struct blk_mq_hw_ctx *hctx,
+ unsigned int this_cpu)
+{
+ const struct cpumask *hk_mask = housekeeping_cpumask(HK_TYPE_IO_QUEUE);
+ int cpu, fallback_isolated_cpu = -1;
+
+ /*
+ * If the CPU being offlined is not a housekeeping CPU,
+ * offlining it will not strand isolated CPUs. Allow it.
+ */
+ if (!cpumask_test_cpu(this_cpu, hk_mask))
+ return true;
+ /*
+ * If this CPU is not mapped to this specific hardware context,
+ * offlining it will not affect the context's I/O routing. Allow it.
+ */
+ if (blk_mq_map_queue_type(hctx->queue, hctx->type, this_cpu) != hctx)
+ return true;
+ /*
+ * Iterate over all online CPUs and manually check their mapping.
+ * We cannot use hctx->cpumask here because blk_mq_map_swqueue()
+ * intentionally strips isolated CPUs from it to prevent kworker
+ * routing.
+ */
+ for_each_online_cpu(cpu) {
+ struct blk_mq_hw_ctx *h;
+
+ if (cpu == this_cpu)
+ continue;
+
+ h = blk_mq_map_queue_type(hctx->queue, hctx->type, cpu);
+ if (h != hctx)
+ continue;
+
+ if (cpumask_test_cpu(cpu, hk_mask))
+ return true;
+
+ if (fallback_isolated_cpu == -1)
+ fallback_isolated_cpu = cpu;
+ }
+
+ if (fallback_isolated_cpu != -1) {
+ pr_warn("blk-mq: trying to offline hctx%u but online isolated CPU %d is still mapped to it\n",
+ hctx->queue_num, fallback_isolated_cpu);
+ return false;
+ }
+
+ return true;
+}
+
static bool blk_mq_hctx_has_online_cpu(struct blk_mq_hw_ctx *hctx,
unsigned int this_cpu)
{
@@ -3771,6 +3821,11 @@ static int blk_mq_hctx_notify_offline(unsigned int cpu, struct hlist_node *node)
struct blk_mq_hw_ctx, cpuhp_online);
int ret = 0;
+ if (housekeeping_enabled(HK_TYPE_IO_QUEUE)) {
+ if (!blk_mq_hctx_can_offline_hk_cpu(hctx, cpu))
+ return -EINVAL;
+ }
+
if (!hctx->nr_ctx || blk_mq_hctx_has_online_cpu(hctx, cpu))
return 0;
--
2.51.0
^ permalink raw reply related
* [PATCH v15 5/8] blk-mq: use hk cpus only when isolcpus=io_queue is enabled
From: Aaron Tomlin @ 2026-05-21 23:29 UTC (permalink / raw)
To: axboe, kbusch, hch, sagi, mst
Cc: atomlin, aacraid, James.Bottomley, martin.petersen, liyihang9,
kashyap.desai, sumit.saxena, shivasharan.srikanteshwara,
chandrakanth.patil, sathya.prakash, sreekanth.reddy,
suganath-prabu.subramani, ranjan.kumar, jinpu.wang, tglx, mingo,
peterz, juri.lelli, vincent.guittot, akpm, maz, ruanjinjie,
bigeasy, yphbchou0911, wagi, frederic, longman, chenridong, hare,
kch, ming.lei, tom.leiming, steve, sean, chjohnst, neelx, mproche,
nick.lange, marco.crivellari, rishil1999, linux-block,
linux-kernel
In-Reply-To: <20260521232956.553287-1-atomlin@atomlin.com>
From: Daniel Wagner <wagi@kernel.org>
Extend the capabilities of the generic CPU to hardware queue (hctx)
mapping code, so it maps houskeeping CPUs and isolated CPUs to the
hardware queues evenly.
A hctx is only operational when there is at least one online
housekeeping CPU assigned (aka active_hctx). Thus, check the final
mapping that there is no hctx which has only offline housekeeing CPU and
online isolated CPUs.
Example mapping result:
16 online CPUs
isolcpus=io_queue,2-3,6-7,12-13
Queue mapping:
hctx0: default 0 2
hctx1: default 1 3
hctx2: default 4 6
hctx3: default 5 7
hctx4: default 8 12
hctx5: default 9 13
hctx6: default 10
hctx7: default 11
hctx8: default 14
hctx9: default 15
IRQ mapping:
irq 42 affinity 0 effective 0 nvme0q0
irq 43 affinity 0 effective 0 nvme0q1
irq 44 affinity 1 effective 1 nvme0q2
irq 45 affinity 4 effective 4 nvme0q3
irq 46 affinity 5 effective 5 nvme0q4
irq 47 affinity 8 effective 8 nvme0q5
irq 48 affinity 9 effective 9 nvme0q6
irq 49 affinity 10 effective 10 nvme0q7
irq 50 affinity 11 effective 11 nvme0q8
irq 51 affinity 14 effective 14 nvme0q9
irq 52 affinity 15 effective 15 nvme0q10
A corner case is when the number of online CPUs and present CPUs
differ and the driver asks for less queues than online CPUs, e.g.
8 online CPUs, 16 possible CPUs
isolcpus=io_queue,2-3,6-7,12-13
virtio_blk.num_request_queues=2
Queue mapping:
hctx0: default 0 1 2 3 4 5 6 7 8 12 13
hctx1: default 9 10 11 14 15
IRQ mapping
irq 27 affinity 0 effective 0 virtio0-config
irq 28 affinity 0-1,4-5,8 effective 5 virtio0-req.0
irq 29 affinity 9-11,14-15 effective 0 virtio0-req.1
Noteworthy is that for the normal/default configuration (!isoclpus) the
mapping will change for systems which have non hyperthreading CPUs. The
main assignment loop will completely rely that group_mask_cpus_evenly to
do the right thing. The old code would distribute the CPUs linearly over
the hardware context:
queue mapping for /dev/nvme0n1
hctx0: default 0 8
hctx1: default 1 9
hctx2: default 2 10
hctx3: default 3 11
hctx4: default 4 12
hctx5: default 5 13
hctx6: default 6 14
hctx7: default 7 15
The assign each hardware context the map generated by the
group_mask_cpus_evenly function:
queue mapping for /dev/nvme0n1
hctx0: default 0 1
hctx1: default 2 3
hctx2: default 4 5
hctx3: default 6 7
hctx4: default 8 9
hctx5: default 10 11
hctx6: default 12 13
hctx7: default 14 15
In case of hyperthreading CPUs, the resulting map stays the same.
Signed-off-by: Daniel Wagner <wagi@kernel.org>
[atomlin:
- Updated blk_mq_validate() to use test_bit() for the new bitmap
- Replaced __free cleanups with traditional goto unwinding to align
with subsystem styling
- Updated blk_mq_map_fallback() to use qmap->queue_offset ensuring
secondary maps do not incorrectly route to the primary default map
- Added a bitmap_empty() check to prevent out-of-bounds CPU routing
when all mapped CPUs are offline
- Migrated active_hctx to a dynamically sized bitmap to fix an
out-of-bounds write when hardware queues exceed the system CPU
count
- Fixed absolute vs. relative hardware queue index mix-up in
blk_mq_map_queues() and validation checks
- Fixed typographical errors
- Reduced stack frame size of blk_mq_num_queues()
- Resolved a TOCTOU race against CPU hotplug events by snapshotting
cpu_online_mask to ensure mapping and validation phases agree
- Corrected a loop overwrite bug in blk_mq_map_queues() by iterating
directly over masks to prevent orphaned queues from being activated
- Restored topology-aware multi-queue fallback in
blk_mq_map_hw_queues() by correctly routing missing IRQ affinity
masks to the map_software path instead of the naive fallback
- Fixed a silent validation bypass in blk_mq_map_hw_queues() caused by
overlapping IRQ affinity masks by evaluating the active_hctx bitmap
in a secondary pass
- Hardened isolation logic in blk_mq_map_hw_queues() to require online
housekeeping CPUs before marking a hardware queue as active
- Enforce safe fallback of 1 when the intersection evaluates to 0]
Signed-off-by: Aaron Tomlin <atomlin@atomlin.com>
---
block/blk-mq-cpumap.c | 238 ++++++++++++++++++++++++++++++++++++++----
1 file changed, 220 insertions(+), 18 deletions(-)
diff --git a/block/blk-mq-cpumap.c b/block/blk-mq-cpumap.c
index 705da074ad6c..efb02655f59e 100644
--- a/block/blk-mq-cpumap.c
+++ b/block/blk-mq-cpumap.c
@@ -22,8 +22,15 @@ static unsigned int blk_mq_num_queues(const struct cpumask *mask,
{
unsigned int num;
- num = cpumask_weight(mask);
- return min_not_zero(num, max_queues);
+ if (housekeeping_enabled(HK_TYPE_IO_QUEUE))
+ num = cpumask_weight_and(mask, housekeeping_cpumask(HK_TYPE_IO_QUEUE));
+ else
+ num = cpumask_weight(mask);
+ /*
+ * Ensure that a count of zero does not inadvertently result in
+ * allocating the maximum number of queues.
+ */
+ return min_not_zero(num ?: 1U, max_queues);
}
/**
@@ -33,7 +40,8 @@ static unsigned int blk_mq_num_queues(const struct cpumask *mask,
* ignored.
*
* Calculates the number of queues to be used for a multiqueue
- * device based on the number of possible CPUs.
+ * device based on the number of possible CPUs. This helper
+ * takes isolcpus settings into account.
*/
unsigned int blk_mq_num_possible_queues(unsigned int max_queues)
{
@@ -48,7 +56,8 @@ EXPORT_SYMBOL_GPL(blk_mq_num_possible_queues);
* ignored.
*
* Calculates the number of queues to be used for a multiqueue
- * device based on the number of online CPUs.
+ * device based on the number of online CPUs. This helper
+ * takes isolcpus settings into account.
*/
unsigned int blk_mq_num_online_queues(unsigned int max_queues)
{
@@ -56,23 +65,139 @@ unsigned int blk_mq_num_online_queues(unsigned int max_queues)
}
EXPORT_SYMBOL_GPL(blk_mq_num_online_queues);
+static bool blk_mq_validate(struct blk_mq_queue_map *qmap,
+ const unsigned long *active_hctx,
+ const struct cpumask *online_mask)
+{
+ /*
+ * Verify if the mapping is usable when housekeeping
+ * configuration is enabled
+ */
+ for (int queue = 0; queue < qmap->nr_queues; queue++) {
+ int cpu;
+
+ if (test_bit(queue, active_hctx)) {
+ /*
+ * This hctx has at least one online CPU thus it
+ * is able to serve any assigned isolated CPU.
+ */
+ continue;
+ }
+
+ /*
+ * There is no housekeeping online CPU for this hctx, all
+ * good as long as all non-housekeeping CPUs are also
+ * offline.
+ */
+ for_each_cpu(cpu, online_mask) {
+ if (qmap->mq_map[cpu] != qmap->queue_offset + queue)
+ continue;
+
+ pr_warn("Unable to create a usable CPU-to-queue mapping with the given constraints\n");
+ return false;
+ }
+ }
+
+ return true;
+}
+
+static void blk_mq_map_fallback(struct blk_mq_queue_map *qmap)
+{
+ unsigned int cpu;
+
+ /*
+ * Map all CPUs to the first hctx of this specific map to ensure
+ * at least one online CPU is serving it, respecting the map's
+ * boundaries so secondary maps do not route into the default map.
+ */
+ for_each_possible_cpu(cpu)
+ qmap->mq_map[cpu] = qmap->queue_offset;
+}
+
void blk_mq_map_queues(struct blk_mq_queue_map *qmap)
{
- const struct cpumask *masks;
+ struct cpumask *masks;
+ const struct cpumask *constraint;
unsigned int queue, cpu, nr_masks;
+ unsigned long *active_hctx;
+ cpumask_var_t online_mask;
- masks = group_cpus_evenly(qmap->nr_queues, &nr_masks);
- if (!masks) {
- for_each_possible_cpu(cpu)
- qmap->mq_map[cpu] = qmap->queue_offset;
- return;
- }
+ active_hctx = bitmap_zalloc(qmap->nr_queues, GFP_KERNEL);
+ if (!active_hctx)
+ goto fallback;
- for (queue = 0; queue < qmap->nr_queues; queue++) {
- for_each_cpu(cpu, &masks[queue % nr_masks])
+ if (!alloc_cpumask_var(&online_mask, GFP_KERNEL))
+ goto free_fallback_hctx;
+
+ /*
+ * Snapshot online CPUs to prevent TOCTOU races between the
+ * mapping phase and the validation phase.
+ */
+ cpumask_copy(online_mask, cpu_online_mask);
+
+ if (housekeeping_enabled(HK_TYPE_IO_QUEUE))
+ constraint = housekeeping_cpumask(HK_TYPE_IO_QUEUE);
+ else
+ constraint = cpu_possible_mask;
+
+ /* Map CPUs to the hardware contexts (hctx) */
+ masks = group_mask_cpus_evenly(qmap->nr_queues, constraint, &nr_masks);
+ if (!masks)
+ goto free_fallback;
+
+ /*
+ * Iterate directly over the generated CPU masks.
+ * Calculate the final, highest hardware queue index that maps to this
+ * mask. This skips all intermediate overwrites and safely evaluates
+ * active_hctx only for queues that survive the mapping.
+ */
+ for (unsigned int idx = 0; idx < nr_masks; idx++) {
+ bool active = false;
+ queue = qmap->nr_queues - 1 -
+ ((qmap->nr_queues - 1 - idx) % nr_masks);
+
+ for_each_cpu(cpu, &masks[idx]) {
qmap->mq_map[cpu] = qmap->queue_offset + queue;
+
+ if (!active && cpumask_test_cpu(cpu, online_mask)) {
+ __set_bit(queue, active_hctx);
+ active = true;
+ }
+ }
+ }
+
+ /*
+ * If all CPUs in the generated masks are offline, the active_hctx
+ * bitmap will be empty. Attempting to route unassigned CPUs to an
+ * empty bitmap will map them out-of-bounds. Fall back instead.
+ */
+ if (bitmap_empty(active_hctx, qmap->nr_queues))
+ goto free_fallback;
+
+ /* Map any unassigned CPU evenly to the hardware contexts (hctx) */
+ queue = find_first_bit(active_hctx, qmap->nr_queues);
+ for_each_cpu_andnot(cpu, cpu_possible_mask, constraint) {
+ qmap->mq_map[cpu] = qmap->queue_offset + queue;
+ queue = find_next_bit_wrap(active_hctx, qmap->nr_queues, queue + 1);
}
+
+ if (!blk_mq_validate(qmap, active_hctx, online_mask))
+ goto free_fallback;
+
kfree(masks);
+ free_cpumask_var(online_mask);
+ bitmap_free(active_hctx);
+
+ return;
+
+free_fallback:
+ kfree(masks);
+ free_cpumask_var(online_mask);
+free_fallback_hctx:
+ bitmap_free(active_hctx);
+
+fallback:
+ blk_mq_map_fallback(qmap);
}
EXPORT_SYMBOL_GPL(blk_mq_map_queues);
@@ -109,24 +234,101 @@ void blk_mq_map_hw_queues(struct blk_mq_queue_map *qmap,
struct device *dev, unsigned int offset)
{
- const struct cpumask *mask;
+ cpumask_var_t mask, online_mask;
+ const struct cpumask *constraint;
+ unsigned long *active_hctx;
unsigned int queue, cpu;
if (!dev->bus->irq_get_affinity)
+ goto map_software;
+
+ active_hctx = bitmap_zalloc(qmap->nr_queues, GFP_KERNEL);
+ if (!active_hctx)
+ goto fallback;
+
+ if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) {
+ bitmap_free(active_hctx);
goto fallback;
+ }
+
+ if (!alloc_cpumask_var(&online_mask, GFP_KERNEL))
+ goto free_fallback_mask;
+
+ if (housekeeping_enabled(HK_TYPE_IO_QUEUE))
+ constraint = housekeeping_cpumask(HK_TYPE_IO_QUEUE);
+ else
+ constraint = cpu_possible_mask;
+ /*
+ * Snapshot online CPUs to prevent TOCTOU races between the
+ * mapping phase and the validation phase.
+ */
+ cpumask_copy(online_mask, cpu_online_mask);
+
+ /* Map CPUs to the hardware contexts (hctx) */
for (queue = 0; queue < qmap->nr_queues; queue++) {
- mask = dev->bus->irq_get_affinity(dev, queue + offset);
- if (!mask)
- goto fallback;
+ const struct cpumask *affinity_mask;
+
+ affinity_mask = dev->bus->irq_get_affinity(dev, offset + queue);
+ if (!affinity_mask)
+ goto free_map_software;
- for_each_cpu(cpu, mask)
+ for_each_cpu(cpu, affinity_mask) {
qmap->mq_map[cpu] = qmap->queue_offset + queue;
+ cpumask_set_cpu(cpu, mask);
+ }
+ }
+
+ /*
+ * Evaluate active_hctx after mapping to handle overlapping masks.
+ * This ensures queues that were overwritten do not falsely pass validation.
+ */
+ for_each_cpu(cpu, mask) {
+ if (cpumask_test_cpu(cpu, online_mask) &&
+ cpumask_test_cpu(cpu, constraint)) {
+ queue = qmap->mq_map[cpu] - qmap->queue_offset;
+ __set_bit(queue, active_hctx);
+ }
+ }
+
+ /*
+ * If all CPUs assigned to this map are offline, the bitmap will
+ * be empty. Fall back instead of routing out of bounds.
+ */
+ if (bitmap_empty(active_hctx, qmap->nr_queues))
+ goto free_fallback;
+
+ /* Map any unassigned CPU evenly to the hardware contexts (hctx) */
+ queue = find_first_bit(active_hctx, qmap->nr_queues);
+ for_each_cpu_andnot(cpu, cpu_possible_mask, mask) {
+ qmap->mq_map[cpu] = qmap->queue_offset + queue;
+ queue = find_next_bit_wrap(active_hctx, qmap->nr_queues, queue + 1);
}
+ if (!blk_mq_validate(qmap, active_hctx, online_mask))
+ goto free_fallback;
+
+ bitmap_free(active_hctx);
+ free_cpumask_var(mask);
+ free_cpumask_var(online_mask);
+
return;
+free_fallback:
+ free_cpumask_var(online_mask);
+free_fallback_mask:
+ bitmap_free(active_hctx);
+ free_cpumask_var(mask);
+
fallback:
+ blk_mq_map_fallback(qmap);
+ return;
+
+free_map_software:
+ free_cpumask_var(online_mask);
+ free_cpumask_var(mask);
+ bitmap_free(active_hctx);
+map_software:
blk_mq_map_queues(qmap);
}
EXPORT_SYMBOL_GPL(blk_mq_map_hw_queues);
--
2.51.0
^ permalink raw reply related
* [PATCH v15 4/8] isolation: Introduce io_queue isolcpus type
From: Aaron Tomlin @ 2026-05-21 23:29 UTC (permalink / raw)
To: axboe, kbusch, hch, sagi, mst
Cc: atomlin, aacraid, James.Bottomley, martin.petersen, liyihang9,
kashyap.desai, sumit.saxena, shivasharan.srikanteshwara,
chandrakanth.patil, sathya.prakash, sreekanth.reddy,
suganath-prabu.subramani, ranjan.kumar, jinpu.wang, tglx, mingo,
peterz, juri.lelli, vincent.guittot, akpm, maz, ruanjinjie,
bigeasy, yphbchou0911, wagi, frederic, longman, chenridong, hare,
kch, ming.lei, tom.leiming, steve, sean, chjohnst, neelx, mproche,
nick.lange, marco.crivellari, rishil1999, linux-block,
linux-kernel
In-Reply-To: <20260521232956.553287-1-atomlin@atomlin.com>
From: Daniel Wagner <wagi@kernel.org>
Multiqueue drivers spread I/O queues across all CPUs for optimal
performance. However, these drivers are not aware of CPU isolation
requirements and will distribute queues without considering the isolcpus
configuration.
Introduce a new isolcpus mask that allows users to define which CPUs
should have I/O queues assigned. This is similar to managed_irq, but
intended for drivers that do not use the managed IRQ infrastructure
Signed-off-by: Daniel Wagner <wagi@kernel.org>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Aaron Tomlin <atomlin@atomlin.com>
---
include/linux/sched/isolation.h | 1 +
kernel/sched/isolation.c | 7 +++++++
2 files changed, 8 insertions(+)
diff --git a/include/linux/sched/isolation.h b/include/linux/sched/isolation.h
index cf0fd03dd7a2..30cb9a44365e 100644
--- a/include/linux/sched/isolation.h
+++ b/include/linux/sched/isolation.h
@@ -18,6 +18,7 @@ enum hk_type {
HK_TYPE_MANAGED_IRQ,
/* Inverse of boot-time nohz_full= or isolcpus=nohz arguments */
HK_TYPE_KERNEL_NOISE,
+ HK_TYPE_IO_QUEUE,
HK_TYPE_MAX,
/*
diff --git a/kernel/sched/isolation.c b/kernel/sched/isolation.c
index ef152d401fe2..3406e3024fd4 100644
--- a/kernel/sched/isolation.c
+++ b/kernel/sched/isolation.c
@@ -16,6 +16,7 @@ enum hk_flags {
HK_FLAG_DOMAIN = BIT(HK_TYPE_DOMAIN),
HK_FLAG_MANAGED_IRQ = BIT(HK_TYPE_MANAGED_IRQ),
HK_FLAG_KERNEL_NOISE = BIT(HK_TYPE_KERNEL_NOISE),
+ HK_FLAG_IO_QUEUE = BIT(HK_TYPE_IO_QUEUE),
};
DEFINE_STATIC_KEY_FALSE(housekeeping_overridden);
@@ -340,6 +341,12 @@ static int __init housekeeping_isolcpus_setup(char *str)
continue;
}
+ if (!strncmp(str, "io_queue,", 9)) {
+ str += 9;
+ flags |= HK_FLAG_IO_QUEUE;
+ continue;
+ }
+
/*
* Skip unknown sub-parameter and validate that it is not
* containing an invalid character.
--
2.51.0
^ permalink raw reply related
* [PATCH v15 3/8] lib/group_cpus: Add group_mask_cpus_evenly()
From: Aaron Tomlin @ 2026-05-21 23:29 UTC (permalink / raw)
To: axboe, kbusch, hch, sagi, mst
Cc: atomlin, aacraid, James.Bottomley, martin.petersen, liyihang9,
kashyap.desai, sumit.saxena, shivasharan.srikanteshwara,
chandrakanth.patil, sathya.prakash, sreekanth.reddy,
suganath-prabu.subramani, ranjan.kumar, jinpu.wang, tglx, mingo,
peterz, juri.lelli, vincent.guittot, akpm, maz, ruanjinjie,
bigeasy, yphbchou0911, wagi, frederic, longman, chenridong, hare,
kch, ming.lei, tom.leiming, steve, sean, chjohnst, neelx, mproche,
nick.lange, marco.crivellari, rishil1999, linux-block,
linux-kernel
In-Reply-To: <20260521232956.553287-1-atomlin@atomlin.com>
From: Daniel Wagner <wagi@kernel.org>
This commit introduces group_mask_cpus_evenly(), which allows callers to
distribute a specific CPU mask evenly across groups. It serves as a bounded
version of group_cpus_evenly().
While group_cpus_evenly() operates on the global cpu_possible_mask,
group_mask_cpus_evenly() confines the distribution strictly within the
boundaries of the caller-provided mask. It preserves the kernel's native
two-stage spreading logic-first prioritising CPUs that are physically
present (cpu_present_mask) to prevent I/O starvation, and then distributing
any remaining vectors to non-present CPUs to maintain hotplug safety.
Signed-off-by: Daniel Wagner <wagi@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
[atomlin:
- Added check for numgrps == 0
- Updated commit message to resolve typo
- Removed unused <linux/sched/isolation.h>
- Fix TOCTOU race by caching the provided mask
- Removed ineffective data_race() annotations around cpumask pointers
- Implemented two-stage grouping logic to prioritise physically
present CPUs, mirroring group_cpus_evenly()
- Fix division-by-zero bug by ensuring group_mask_cpus_evenly()
returns NULL instead of an empty array when evaluated against an
empty mask]
Signed-off-by: Aaron Tomlin <atomlin@atomlin.com>
---
include/linux/group_cpus.h | 3 +
lib/group_cpus.c | 110 +++++++++++++++++++++++++++++++++++++
2 files changed, 113 insertions(+)
diff --git a/include/linux/group_cpus.h b/include/linux/group_cpus.h
index 9d4e5ab6c314..defab4123a82 100644
--- a/include/linux/group_cpus.h
+++ b/include/linux/group_cpus.h
@@ -10,5 +10,8 @@
#include <linux/cpu.h>
struct cpumask *group_cpus_evenly(unsigned int numgrps, unsigned int *nummasks);
+struct cpumask *group_mask_cpus_evenly(unsigned int numgrps,
+ const struct cpumask *mask,
+ unsigned int *nummasks);
#endif
diff --git a/lib/group_cpus.c b/lib/group_cpus.c
index b8d54398f88a..75bd082e00bf 100644
--- a/lib/group_cpus.c
+++ b/lib/group_cpus.c
@@ -563,3 +563,113 @@ struct cpumask *group_cpus_evenly(unsigned int numgrps, unsigned int *nummasks)
return masks;
}
EXPORT_SYMBOL_GPL(group_cpus_evenly);
+
+/**
+ * group_mask_cpus_evenly - Group all CPUs evenly per NUMA/CPU locality
+ * @numgrps: number of cpumasks to create
+ * @mask: CPUs to consider for the grouping
+ * @nummasks: number of initialized cpumasks
+ *
+ * Return: cpumask array if successful, NULL otherwise. Only the CPUs
+ * marked in the mask will be considered for the grouping. And each
+ * element includes CPUs assigned to this group. nummasks contains the
+ * number of initialized masks which can be less than numgrps.
+ *
+ * Try to put close CPUs from viewpoint of CPU and NUMA locality into
+ * the same group.
+ *
+ * We guarantee in the resulting grouping that all CPUs specified in the
+ * provided mask are covered, and no same CPU is assigned to multiple
+ * groups.
+ */
+struct cpumask *group_mask_cpus_evenly(unsigned int numgrps,
+ const struct cpumask *mask,
+ unsigned int *nummasks)
+{
+ unsigned int curgrp = 0, nr_present = 0, nr_others = 0;
+ cpumask_var_t *node_to_cpumask;
+ cpumask_var_t nmsk, local_mask, npresmsk;
+ int ret = -ENOMEM;
+ struct cpumask *masks = NULL;
+
+ if (numgrps == 0)
+ return NULL;
+
+ if (!zalloc_cpumask_var(&nmsk, GFP_KERNEL))
+ return NULL;
+
+ if (!zalloc_cpumask_var(&local_mask, GFP_KERNEL))
+ goto fail_nmsk;
+
+ if (!zalloc_cpumask_var(&npresmsk, GFP_KERNEL))
+ goto fail_local_mask;
+
+ node_to_cpumask = alloc_node_to_cpumask();
+ if (!node_to_cpumask)
+ goto fail_npresmsk;
+
+ masks = kzalloc_objs(*masks, numgrps);
+ if (!masks)
+ goto fail_node_to_cpumask;
+
+ build_node_to_cpumask(node_to_cpumask);
+
+ /*
+ * Create a stable snapshot of the mask. The grouping algorithm
+ * requires the CPU count to remain constant across its multiple
+ * passes. This prevents allocation failures if the caller passes a
+ * dynamic mask (e.g., cpu_online_mask) that changes concurrently.
+ */
+ cpumask_copy(local_mask, mask);
+
+ /*
+ * Grouping present CPUs first. We intersect the provided mask with
+ * cpu_present_mask to ensure that we prioritise physically
+ * available CPUs for the initial distribution.
+ */
+ cpumask_and(npresmsk, local_mask, cpu_present_mask);
+ ret = __group_cpus_evenly(curgrp, numgrps, node_to_cpumask,
+ npresmsk, nmsk, masks);
+ if (ret < 0)
+ goto fail_node_to_cpumask;
+ nr_present = ret;
+
+ /*
+ * Allocate non-present CPUs starting from the next group to be
+ * handled. If the grouping of present CPUs already exhausted the
+ * group space, assign the non-present CPUs to the already
+ * allocated out groups.
+ */
+ if (nr_present >= numgrps)
+ curgrp = 0;
+ else
+ curgrp = nr_present;
+ cpumask_andnot(npresmsk, local_mask, npresmsk);
+ ret = __group_cpus_evenly(curgrp, numgrps, node_to_cpumask,
+ npresmsk, nmsk, masks);
+ if (ret >= 0)
+ nr_others = ret;
+
+fail_node_to_cpumask:
+ free_node_to_cpumask(node_to_cpumask);
+
+fail_npresmsk:
+ free_cpumask_var(npresmsk);
+
+fail_local_mask:
+ free_cpumask_var(local_mask);
+
+fail_nmsk:
+ free_cpumask_var(nmsk);
+ if (ret < 0) {
+ kfree(masks);
+ return NULL;
+ }
+ *nummasks = min(nr_present + nr_others, numgrps);
+ if (*nummasks == 0) {
+ kfree(masks);
+ return NULL;
+ }
+ return masks;
+}
+EXPORT_SYMBOL_GPL(group_mask_cpus_evenly);
--
2.51.0
^ permalink raw reply related
* [PATCH v15 2/8] lib/group_cpus: remove dead !SMP code
From: Aaron Tomlin @ 2026-05-21 23:29 UTC (permalink / raw)
To: axboe, kbusch, hch, sagi, mst
Cc: atomlin, aacraid, James.Bottomley, martin.petersen, liyihang9,
kashyap.desai, sumit.saxena, shivasharan.srikanteshwara,
chandrakanth.patil, sathya.prakash, sreekanth.reddy,
suganath-prabu.subramani, ranjan.kumar, jinpu.wang, tglx, mingo,
peterz, juri.lelli, vincent.guittot, akpm, maz, ruanjinjie,
bigeasy, yphbchou0911, wagi, frederic, longman, chenridong, hare,
kch, ming.lei, tom.leiming, steve, sean, chjohnst, neelx, mproche,
nick.lange, marco.crivellari, rishil1999, linux-block,
linux-kernel
In-Reply-To: <20260521232956.553287-1-atomlin@atomlin.com>
From: Daniel Wagner <wagi@kernel.org>
The core scheduler recently transitioned to compiling SMP data
structures unconditionally to reduce code complexity - see commit
cac5cefbade9 ("sched/smp: Make SMP unconditional").
In alignment with this philosophy of reducing dual-path maintenance,
this patch removes the #ifdef CONFIG_SMP guards and the dedicated !SMP
fallback logic here.
While the !SMP path provided a slightly simpler execution flow for
uniprocessor kernels (avoiding SMP-specific overhead), maintaining these
separate code paths adds unnecessary complexity and testing burden.
Removing these guards simplifies the codebase by standardizing entirely
on the SMP logic, which safely resolves to single-CPU operations on UP
configurations.
Signed-off-by: Daniel Wagner <wagi@kernel.org>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
[atomlin: Updated commit message to clarify !SMP removal context]
Signed-off-by: Aaron Tomlin <atomlin@atomlin.com>
---
lib/group_cpus.c | 20 --------------------
1 file changed, 20 deletions(-)
diff --git a/lib/group_cpus.c b/lib/group_cpus.c
index e6e18d7a49bb..b8d54398f88a 100644
--- a/lib/group_cpus.c
+++ b/lib/group_cpus.c
@@ -9,8 +9,6 @@
#include <linux/sort.h>
#include <linux/group_cpus.h>
-#ifdef CONFIG_SMP
-
static void grp_spread_init_one(struct cpumask *irqmsk, struct cpumask *nmsk,
unsigned int cpus_per_grp)
{
@@ -564,22 +562,4 @@ struct cpumask *group_cpus_evenly(unsigned int numgrps, unsigned int *nummasks)
*nummasks = min(nr_present + nr_others, numgrps);
return masks;
}
-#else /* CONFIG_SMP */
-struct cpumask *group_cpus_evenly(unsigned int numgrps, unsigned int *nummasks)
-{
- struct cpumask *masks;
-
- if (numgrps == 0)
- return NULL;
-
- masks = kzalloc_objs(*masks, numgrps);
- if (!masks)
- return NULL;
-
- /* assign all CPUs(cpu 0) to the 1st group only */
- cpumask_copy(&masks[0], cpu_possible_mask);
- *nummasks = 1;
- return masks;
-}
-#endif /* CONFIG_SMP */
EXPORT_SYMBOL_GPL(group_cpus_evenly);
--
2.51.0
^ permalink raw reply related
* [PATCH v15 1/8] scsi: aacraid: use block layer helpers to calculate num of queues
From: Aaron Tomlin @ 2026-05-21 23:29 UTC (permalink / raw)
To: axboe, kbusch, hch, sagi, mst
Cc: atomlin, aacraid, James.Bottomley, martin.petersen, liyihang9,
kashyap.desai, sumit.saxena, shivasharan.srikanteshwara,
chandrakanth.patil, sathya.prakash, sreekanth.reddy,
suganath-prabu.subramani, ranjan.kumar, jinpu.wang, tglx, mingo,
peterz, juri.lelli, vincent.guittot, akpm, maz, ruanjinjie,
bigeasy, yphbchou0911, wagi, frederic, longman, chenridong, hare,
kch, ming.lei, tom.leiming, steve, sean, chjohnst, neelx, mproche,
nick.lange, marco.crivellari, rishil1999, linux-block,
linux-kernel
In-Reply-To: <20260521232956.553287-1-atomlin@atomlin.com>
From: Daniel Wagner <wagi@kernel.org>
The calculation of the upper limit for queues does not depend solely on
the number of online CPUs; for example, the isolcpus kernel
command-line option must also be considered.
To account for this, the block layer provides a helper function to
retrieve the maximum number of queues. Use it to set an appropriate
upper queue number limit.
This patch brings aacraid in line with the API migration initiated for
other SCSI drivers in commit 94970cfb5f10 ("scsi: use block layer
helpers to calculate num of queues").
Signed-off-by: Daniel Wagner <wagi@kernel.org>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
[atomlin: Drop "Fixes:" tag; indicate alignment with other SCSI drivers]
Signed-off-by: Aaron Tomlin <atomlin@atomlin.com>
---
drivers/scsi/aacraid/comminit.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/scsi/aacraid/comminit.c b/drivers/scsi/aacraid/comminit.c
index 9bd3f5b868bc..ec165b57182d 100644
--- a/drivers/scsi/aacraid/comminit.c
+++ b/drivers/scsi/aacraid/comminit.c
@@ -469,8 +469,7 @@ void aac_define_int_mode(struct aac_dev *dev)
}
/* Don't bother allocating more MSI-X vectors than cpus */
- msi_count = min(dev->max_msix,
- (unsigned int)num_online_cpus());
+ msi_count = blk_mq_num_online_queues(dev->max_msix);
dev->max_msix = msi_count;
--
2.51.0
^ permalink raw reply related
* [PATCH v15 0/8] blk: honor isolcpus configuration
From: Aaron Tomlin @ 2026-05-21 23:29 UTC (permalink / raw)
To: axboe, kbusch, hch, sagi, mst
Cc: atomlin, aacraid, James.Bottomley, martin.petersen, liyihang9,
kashyap.desai, sumit.saxena, shivasharan.srikanteshwara,
chandrakanth.patil, sathya.prakash, sreekanth.reddy,
suganath-prabu.subramani, ranjan.kumar, jinpu.wang, tglx, mingo,
peterz, juri.lelli, vincent.guittot, akpm, maz, ruanjinjie,
bigeasy, yphbchou0911, wagi, frederic, longman, chenridong, hare,
kch, ming.lei, tom.leiming, steve, sean, chjohnst, neelx, mproche,
nick.lange, marco.crivellari, rishil1999, linux-block,
linux-kernel
Hi,
I have decided to drive this series forward on behalf of Daniel Wagner, the
original author. The series has been rebased on v7.1-rc4-100-g8bc67e4db64a.
This series introduces a new CPU isolation feature, "isolcpus=io_queue",
designed to protect isolated cores from the disruptive hardware interrupts
generated by high-performance multi-queue devices.
When enabled, it fundamentally alters how the generic IRQ subsystem and the
block layer (blk-mq) map hardware queues:
1. Restricted IRQ Affinity: Managed hardware interrupts are strictly
confined to online housekeeping CPUs.
2. Transparent I/O Submission: Applications running on isolated CPUs
can still seamlessly submit I/O requests; however, the resulting
hardware completion interrupts are safely routed to a designated
housekeeping CPU.
3. Topology-Aware Queue Allocation: The generic CPU-to-hardware-queue
mapping logic is extended to distribute hardware contexts evenly
among the available housekeeping CPUs, preventing MSI-X vector
exhaustion while maintaining optimal cache locality where possible.
To prevent I/O stalls, the block layer is additionally hardened to reject
hot-plug requests that attempt to offline a housekeeping CPU if it is the
last remaining CPU actively serving an online isolated core.
The complex "top-down" mask plumbing introduced in v12, which modified
struct irq_affinity and expanded block layer APIs, has been abandoned. It
is replaced by a centralised approach: direct isolation querying via
housekeeping_cpumask(HK_TYPE_IO_QUEUE) within the genirq/affinity
subsystem. This architectural simplification successfully decouples core
changes from driver-specific implementations.
Please let me know your thoughts.
Changes since v14:
- Fixed a division-by-zero by ensuring group_mask_cpus_evenly() safely
frees its allocations and returns NULL instead of an empty array if the
provided mask yields zero groups.
- Fixed a device probe -ENOSPC regression in blk_mq_num_queues(). If the
housekeeping mask intersection evaluated to 0 (e.g., against a localised
NUMA node), min_not_zero() would erroneously return the absolute maximum
hardware queues. The result is now safely clamped to a minimum of 1.
- Added a mapping verification check to prevent unrelated housekeeping
CPUs from aborting the global hotplug offline sequence.
- Aligned the pr_warn format specifier with the unsigned int declaration
of hctx->queue_num in blk_mq_hctx_can_offline_hk_cpu().
- Linked to v14: https://lore.kernel.org/lkml/20260520215030.496803-1-atomlin@atomlin.com/
Changes since v13:
- Removed ineffective data_race() annotations around mask and
cpu_present_mask pointers. Wrapping the pointers failed to suppress
KCSAN warnings for the underlying inline bitmap memory accesses.
- Fixed a silent validation bypass in blk_mq_map_hw_queues() caused by
overlapping IRQ affinity masks by removing the short-circuiting
optimisation and evaluating the active_hctx bitmap in a secondary pass.
- Restored topology-aware multi-queue fallback by correctly routing
missing IRQ affinity masks to the map_software path instead of the naive
map-all fallback.
- Dropped hctx->queue->disk->disk_name from warning to avoid a UAF.
- Fixed an isolation leak where excess allocated hardware queues were
improperly padded with irq_default_affinity. Because these queues are
marked as managed, they bypassed user-space IRQ balancing; they are now
safely padded with the housekeeping mask.
- Enforced the housekeeping vector cap prior to evaluating driver-provided
calc_sets() callbacks, preventing modern multi-queue drivers from
bypassing the cap and wasting memory on dead queues.
- Introduced a safety net to the vector calculation to prevent fatal
-ENOSPC device probe aborts on heavily isolated systems where the
housekeeping CPU count is lower than the device's structural minimum.
- Removed an inaccurate claim stating that the io_queue isolation flag
takes precedence over managed_irq. Both flags are parsed, evaluated, and
enforced entirely independently by their respective subsystems.
- Linked to v13: https://lore.kernel.org/lkml/20260513005509.135966-1-atomlin@atomlin.com/
Changes since v12:
- Resolved TOCTOU race conditions against CPU hotplug events in
blk_mq_map_queues() and group_mask_cpus_evenly() by taking lockless
snapshots of the online CPU mask prior to algorithmic evaluation.
- Migrated the active_hctx tracking to a dynamically sized bitmap
(bitmap_zalloc), resolving a critical out-of-bounds memory write that
occurred when hardware queues exceeded the system CPU count.
- Wrapped the disk pointer fetch in blk_mq_hctx_can_offline_hk_cpu() with
READ_ONCE() to prevent a TOCTOU NULL pointer dereference against
concurrent device teardowns.
- Introduced bitmap_empty() checks to prevent the mapping logic from
routing unassigned CPUs into unallocated memory when all mapped CPUs are
offline, safely forcing a fallback mapping instead.
- Implemented a native two-stage distribution logic in
group_mask_cpus_evenly() that first prioritises physically present CPUs
to prevent I/O starvation before distributing remaining vectors to
non-present CPUs for hotplug safety.
- Restricted the maximum number of allocated vectors in
irq_calc_affinity_vectors() to the weight of the housekeeping mask,
preventing drivers from wasting memory on dead hardware queues that
physically cannot be routed.
- Added padding logic using irq_default_affinity for sets where isolation
constraints yield fewer masks than requested vectors, preserving the 1:1
hardware queue mapping sequence for subsequent sets.
- Fixed a logic flaw that prematurely rejected valid offline requests by
manually iterating over cpu_online_mask and reverse-mapping to
accurately detect isolated CPUs, properly permitting the offlining of
non-housekeeping CPUs.
- Corrected an absolute versus relative queue index calculation bug in
blk_mq_map_queues() that was overwriting loop iterations, by iterating
directly over the generated masks.
- Replaced scoped __free cleanups with traditional goto unwinding in the
block layer to align with subsystem styling guidelines.
- Refined the io_queue kernel command-line parameter documentation for
better clarity and precision.
- Linked to v12: https://lore.kernel.org/lkml/20260422185215.100929-1-atomlin@atomlin.com/
Changes since v11:
- Removed duplicate paragraph from the commit message in patch 11
(Marco Crivellari)
- Ensure ZERO_SIZE_PTR is not returned by group_mask_cpus_evenly()
(Marco Crivellari)
- Linked to v11: https://lore.kernel.org/lkml/20260416192942.1243421-1-atomlin@atomlin.com/
Changes since v10:
- Completely rewrote the isolcpus=io_queue documentation in
Documentation/admin-guide/kernel-parameters.txt to clarify its exclusive
application to managed IRQs, queue allocation limits, vector exhaustion
prevention, and hardware interrupt routing (Ming Lei)
- Fixed a stack frame bloat issue by avoiding the on-stack declaration of
struct cpumask (Waiman Long)
- Linked to v10: https://lore.kernel.org/linux-nvme/20260401222312.772334-1-atomlin@atomlin.com/
Changes since v9:
- Fixed a page fault regression encountered when initialising secondary
queue maps (e.g., NVMe poll queues). Restored the qmap->queue_offset to
the mq_map assignment to ensure CPUs are strictly mapped to absolute
hardware indices (Keith Busch)
- Corrected the active_hctx tracker to utilise relative queue indices,
preventing out-of-bounds mask assignments
- Fixed the blk_mq_validate() sanity check to properly evaluate absolute
queue indices against the offset-adjusted loop index
- Corrected typographical errors within block/blk-mq-cpumap.c
(Keith Busch)
- Clarified the commit message regarding the removal of the !SMP fallback
code, explicitly noting that the core scheduler now mandates SMP
unconditionally (Sebastian Andrzej Siewior)
- Added missing "Signed-off-by:" tags to properly record the patch series
chain of custody
- Linked to v9: https://lore.kernel.org/lkml/20260330221047.630206-1-atomlin@atomlin.com/
Changes since v8:
- Added "Reviewed-by:" tags
- Introduced irq_spread_hk_filter() to safely restrict managed IRQ
affinity to housekeeping CPUs (Thomas Gleixner)
- Removed the unsafe global static variable blk_hk_online_mask from
blk-mq-cpumap.c and blk-mq.c. blk_mq_online_queue_affinity() now returns
a stable pointer, delegating safe intersection to the callers to prevent
concurrent modification races (Thomas Gleixner, Hannes Reinecke)
- Resolved BUG: kernel NULL pointer dereference in __blk_mq_all_tag_iter
reported by the kernel test robot during cpuhotplug rcutorture stress
testing
- Linked to v8: https://lore.kernel.org/lkml/20250905-isolcpus-io-queues-v8-0-885984c5daca@kernel.org/
Changes since v7:
- Added commit 524f5eea4bbe ("lib/group_cpus: remove !SMP code")
- Merged the new mapping logic directly into the existing function to
avoid special casing
- Refined the group_mask_cpus_evenly() implementation with the following
updates:
- Corrected the function name typo (changed group_masks_cpus_evenly to
group_mask_cpus_evenly)
- Updated the documentation comment to accurately reflect the function's
behavior
- Renamed the cpu_mask argument to mask for consistency
- Added a new patch for aacraid to include the missing number of queues
calculation
- Restricted updates to only affect SCSI drivers that support
PCI_IRQ_AFFINITY and do not utilise nvme-fabrics
- Removed the __free cleanup attribute usage for cpumask_var_t allocations
due to compatibility issues
- Updated the documentation to explicitly highlight the limitations
surrounding CPU offlining
- Collected accumulated Reviewed-by and Acked-by tags
- Linked to v7: https://patch.msgid.link/20250702-isolcpus-io-queues-v7-0-557aa7eacce4@kernel.org
Changes since v6:
- Sent out the first part of the series independently:
https://lore.kernel.org/all/20250617-isolcpus-queue-counters-v1-0-13923686b54b@kernel.org/
- Added comprehensive kernel command-line documentation
- Added validation logic to ensure the resulting CPU-to-queue mapping is
fully operational
- Rewrote the isolcpus mapping code to properly account for active
hardware contexts (hctx)
- Introduced blk_mq_map_hk_irq_queues, which utilizes the mask retrieved
from irq_get_affinity()
- Refactored blk_mq_map_hk_queues to require the caller to explicitly test
for HK_TYPE_MANAGED_IRQ
- Linked to v6: https://patch.msgid.link/20250424-isolcpus-io-queues-v6-0-9a53a870ca1f@kernel.org
Changes since v5:
- Reintroduced the io_queue type for the isolcpus kernel parameter
- Prevented the offlining of a housekeeping CPU if an isolated CPU is
still present, upgrading this behavior from a simple warning to a hard
restriction
- Linked to v5: https://lore.kernel.org/r/20250110-isolcpus-io-queues-v5-0-0e4f118680b0@kernel.org
Changes since v4:
- Rebased the series onto the latest for-6.14/block branch.
- Updated the documentation regarding the managed_irq parameters
- Reworded the commit message for "blk-mq: issue warning when offlining
hctx with online isolcpus" for better clarity
- Split the input and output parameters in the patch "lib/group_cpus: let
group_cpu_evenly return number of groups"
- Dropped the patch "sched/isolation: document HK_TYPE housekeeping
option"
- Linked to v4: https://lore.kernel.org/r/20241217-isolcpus-io-queues-v4-0-5d355fbb1e14@kernel.org
Changes since v3:
- Added the patch "blk-mq: issue warning when offlining hctx with online
isolcpus"
- Fixed the check in group_cpus_evenly(); the condition now properly uses
housekeeping_enabled() instead of cpumask_weight(), as the latter always
returns a valid mask
- Dropped the Fixes: tag from "lib/group_cpus.c: honor housekeeping config
when grouping CPUs"
- Fixed an overlong line warning in the patch "scsi: use block layer
helpers to calculate num of queues"
- Dropped the patch "sched/isolation: Add io_queue housekeeping option" in
favor of simply documenting the housekeeping hk_type enum
- Added the patch "lib/group_cpus: let group_cpu_evenly return number of
groups"
- Collected accumulated Reviewed-by and Acked-by tags
- Split the patchset by moving foundational changes into a separate
preparation series:
https://lore.kernel.org/linux-nvme/20241202-refactor-blk-affinity-helpers-v6-0-27211e9c2cd5@kernel.org/
- Linked to v3: https://lore.kernel.org/r/20240806-isolcpus-io-queues-v3-0-da0eecfeaf8b@suse.de
Changes since v2:
- Integrated patches from Ming Lei
(https://lore.kernel.org/all/20210709081005.421340-1-ming.lei@redhat.com/):
"virtio: add APIs for retrieving vq affinity" and "blk-mq: introduce
blk_mq_dev_map_queues"
- Replaced all instances of blk_mq_pci_map_queues and
blk_mq_virtio_map_queues with the new unified blk_mq_dev_map_queues
- Updated and expanded the helper functions used for calculating the
number of queues
- Added the CPU-to-hctx mapping function specifically to support the
isolcpus=io_queue parameter
- Documented the hk_type enum and the newly introduced isolcpus=io_queue
parameter
- Added the patch "scsi: pm8001: do not overwrite PCI queue mapping"
- Linked to v2: https://lore.kernel.org/r/20240627-isolcpus-io-queues-v2-0-26a32e3c4f75@suse.de
Changes since v1:
- Updated the feature documentation for clarity and completeness
- Split the blk/nvme-pci patch into smaller, logical commits
- Dropped the HK_TYPE_IO_QUEUE macro in favor of reusing
HK_TYPE_MANAGED_IRQ
- Linked to v1: https://lore.kernel.org/r/20240621-isolcpus-io-queues-v1-0-8b169bf41083@suse.de
Aaron Tomlin (1):
genirq/affinity: Restrict managed IRQ affinity to housekeeping CPUs
Daniel Wagner (7):
scsi: aacraid: use block layer helpers to calculate num of queues
lib/group_cpus: remove dead !SMP code
lib/group_cpus: Add group_mask_cpus_evenly()
isolation: Introduce io_queue isolcpus type
blk-mq: use hk cpus only when isolcpus=io_queue is enabled
blk-mq: prevent offlining hk CPUs with associated online isolated CPUs
docs: add io_queue flag to isolcpus
.../admin-guide/kernel-parameters.txt | 26 +-
block/blk-mq-cpumap.c | 238 ++++++++++++++++--
block/blk-mq.c | 55 ++++
drivers/scsi/aacraid/comminit.c | 3 +-
include/linux/group_cpus.h | 3 +
include/linux/sched/isolation.h | 1 +
kernel/irq/affinity.c | 31 ++-
kernel/sched/isolation.c | 7 +
lib/group_cpus.c | 112 ++++++++-
9 files changed, 436 insertions(+), 40 deletions(-)
base-commit: 8bc67e4db64aa72732c474b44ea8622062c903f0
--
2.51.0
^ permalink raw reply
* Re: Observing higher CPU utilization during random IO fio testing
From: Jens Axboe @ 2026-05-21 21:52 UTC (permalink / raw)
To: Wen Xiong, linux-block; +Cc: tom.leiming, jmoyer, Gjoyce, wenxiong, Yu Kuai
In-Reply-To: <338169f719c77e4afe58f42e9760349e@linux.ibm.com>
On 5/21/26 1:44 PM, Wen Xiong wrote:
> Hi All,
>
> Our performance team observed the higher CPU utilization in RHEL10 compared to RHEL9.8, observed the similar issue in upstream kernel(v7.1-rc4) as well when running FIO random IO tests.
>
> System configuration:
> 47 dedicate cores
> 120 GB memory
> PCIe4 2-Port 64Gb FC Adapter
> FlashSystem: FS9500, 12 LUNs/FC port, 100G each LUN.
>
> Random IO tests are more CPU intensive than sequential IO tests due to several factors: more context switching, Interrupt Handling, cache Inefficiency etc. We found out the following patch which caused the higher CPU utilization in rhel10 and newer linux kernel:
>
> commit 060406c61c7cb4bbd82a02d179decca9c9bb3443 (HEAD)
> Author: Yu Kuai <yukuai3@huawei.com>
> Date: Thu May 9 20:38:25 2024 +0800
>
> block: add plug while submitting IO
>
> So that if caller didn't use plug, for example, __blkdev_direct_IO_simple()
> and __blkdev_direct_IO_async(), block layer can still benefit from caching
> nsec time in the plug.
>
> Signed-off-by: Yu Kuai <yukuai3@huawei.com>
> Link: https://lore.kernel.org/r/20240509123825.3225207-1-yukuai1@huaweicloud.com
> Signed-off-by: Jens Axboe <axboe@kernel.dk>
>
> We reverted above patch in rhel10 kernel and upstream 7.1-rc4, saw lower CPU utilization when doing the same FIO test.
>
> The patch adds plugging in __submit_bio() in block layer, maybe cause performance degradation:
> - Random IO tests have less merging, flush overhead.
> - More IO scheduler interaction, forces requests through scheduler instead of direct dispatch(direct dispatch to hardware queue)
> - Poor cache locality during plug operation
>
> Below are some performance data that our performance team collected:
>
> RHEL9.8 comparison RHEL10.0
> Iotype qd nj rmix mpstat busy delta lparstat delta
> Randrw 1 20 100 135% 109%
> Randrw 1 40 100 72% 81%
> Randrw 1 20 70 278% 174%
> Randrw 1 40 70 272% 191%
> Randrw 1 20 0 93% 30%
> Randrw 1 40 0 104% 36%
>
> RHEL 9.8 comparison RHEL10 with reverting above plugging patch in block layer.h
> Iotype qd nj rmix mpstat busy delta lparstat deltab
> Randrw 1 20 100 -12% 20%
> Randrw 1 40 100 -42% -4%
> Randrw 1 20 70 70% 71%
> Randrw 1 40 70 %51 60%
> Randrw 1 20 0 -14% -43%
> Randrw 1 40 0 -33% -51%
>
> Can a block layer expert help us resolve this high CPU utilization performance issue?
> Let us know if you need more performance data or other perf data.
Let's CC Yu Kuai who wrote that commit, that might help.
--
Jens Axboe
^ permalink raw reply
* Observing higher CPU utilization during random IO fio testing
From: Wen Xiong @ 2026-05-21 19:44 UTC (permalink / raw)
To: linux-block, axboe; +Cc: tom.leiming, jmoyer, Gjoyce, wenxiong
Hi All,
Our performance team observed the higher CPU utilization in RHEL10
compared to RHEL9.8, observed the similar issue in upstream
kernel(v7.1-rc4) as well when running FIO random IO tests.
System configuration:
47 dedicate cores
120 GB memory
PCIe4 2-Port 64Gb FC Adapter
FlashSystem: FS9500, 12 LUNs/FC port, 100G each LUN.
Random IO tests are more CPU intensive than sequential IO tests due to
several factors: more context switching, Interrupt Handling, cache
Inefficiency etc. We found out the following patch which caused the
higher CPU utilization in rhel10 and newer linux kernel:
commit 060406c61c7cb4bbd82a02d179decca9c9bb3443 (HEAD)
Author: Yu Kuai <yukuai3@huawei.com>
Date: Thu May 9 20:38:25 2024 +0800
block: add plug while submitting IO
So that if caller didn't use plug, for example,
__blkdev_direct_IO_simple()
and __blkdev_direct_IO_async(), block layer can still benefit from
caching
nsec time in the plug.
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Link:
https://lore.kernel.org/r/20240509123825.3225207-1-yukuai1@huaweicloud.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
We reverted above patch in rhel10 kernel and upstream 7.1-rc4, saw lower
CPU utilization when doing the same FIO test.
The patch adds plugging in __submit_bio() in block layer, maybe cause
performance degradation:
- Random IO tests have less merging, flush overhead.
- More IO scheduler interaction, forces requests through scheduler
instead of direct dispatch(direct dispatch to hardware queue)
- Poor cache locality during plug operation
Below are some performance data that our performance team collected:
RHEL9.8 comparison RHEL10.0
Iotype qd nj rmix mpstat busy delta lparstat
delta
Randrw 1 20 100 135% 109%
Randrw 1 40 100 72% 81%
Randrw 1 20 70 278% 174%
Randrw 1 40 70 272% 191%
Randrw 1 20 0 93% 30%
Randrw 1 40 0 104% 36%
RHEL 9.8 comparison RHEL10 with reverting above plugging patch in block
layer.h
Iotype qd nj rmix mpstat busy delta lparstat
deltab
Randrw 1 20 100 -12% 20%
Randrw 1 40 100 -42% -4%
Randrw 1 20 70 70% 71%
Randrw 1 40 70 %51 60%
Randrw 1 20 0 -14% -43%
Randrw 1 40 0 -33% -51%
Can a block layer expert help us resolve this high CPU utilization
performance issue?
Let us know if you need more performance data or other perf data.
Thanks a lot for your help!
Wendy
^ permalink raw reply
* Re: [PATCHv3] blk-mq: pop cached request if it is usable
From: Jens Axboe @ 2026-05-21 19:05 UTC (permalink / raw)
To: hch, linux-block, Keith Busch; +Cc: tom.leiming, Keith Busch
In-Reply-To: <20260521190253.242065-1-kbusch@meta.com>
On Thu, 21 May 2026 12:02:53 -0700, Keith Busch wrote:
> When submitting a bio to blk-mq, if the task should sleep after peeking
> a cached request, but before it pops it, the plug flushes and calls
> blk_mq_free_plug_rqs, freeing the cached_rqs. This creates a
> use-after-free bug. Fix this by popping the cached request before any
> possible blocking calls if it is suitable for use.
>
> Popping this request first holds a queue reference, so avoid any
> serialization races with queue freezes and can safely proceed with
> dispatching that request to the driver. This potentially increases a
> timing window from when a driver wants to freeze its queue to when
> requests stop being dispatched. That scenario is off the fast path
> though, and drivers need to appropriately handle requests during a
> freeze request anyway.
>
> [...]
Applied, thanks!
[1/1] blk-mq: pop cached request if it is usable
commit: dc278e9bf2b9513a763353e6b9cc21e0f532954e
Best regards,
--
Jens Axboe
^ permalink raw reply
* Re: [PATCHv3] blk-mq: pop cached request if it is usable
From: Jens Axboe @ 2026-05-21 19:05 UTC (permalink / raw)
To: Keith Busch, hch, linux-block; +Cc: tom.leiming, Keith Busch
In-Reply-To: <20260521190253.242065-1-kbusch@meta.com>
On 5/21/26 1:02 PM, Keith Busch wrote:
> From: Keith Busch <kbusch@kernel.org>
>
> When submitting a bio to blk-mq, if the task should sleep after peeking
> a cached request, but before it pops it, the plug flushes and calls
> blk_mq_free_plug_rqs, freeing the cached_rqs. This creates a
> use-after-free bug. Fix this by popping the cached request before any
> possible blocking calls if it is suitable for use.
>
> Popping this request first holds a queue reference, so avoid any
> serialization races with queue freezes and can safely proceed with
> dispatching that request to the driver. This potentially increases a
> timing window from when a driver wants to freeze its queue to when
> requests stop being dispatched. That scenario is off the fast path
> though, and drivers need to appropriately handle requests during a
> freeze request anyway.
>
> The downside is the popped element needs to be individually freed when
> we performed a bio plug merge. The cached request would have had to be
> freed later anyway, but this patch does it inline with building the plug
> list instead of after flushing it.
Keith and I had a side-bar about this earlier today, and yes this is so
much better imho than both v2 or Christoph's sledge hammer.
I've already tested this one too, and as expected, it's not regressing
performance. It's also saner in that there's no gap between peek and pop
anymore, so no risk of further blocking screwing with the list on
unplug.
--
Jens Axboe
^ permalink raw reply
* [PATCHv3] blk-mq: pop cached request if it is usable
From: Keith Busch @ 2026-05-21 19:02 UTC (permalink / raw)
To: axboe, hch, linux-block; +Cc: tom.leiming, Keith Busch
From: Keith Busch <kbusch@kernel.org>
When submitting a bio to blk-mq, if the task should sleep after peeking
a cached request, but before it pops it, the plug flushes and calls
blk_mq_free_plug_rqs, freeing the cached_rqs. This creates a
use-after-free bug. Fix this by popping the cached request before any
possible blocking calls if it is suitable for use.
Popping this request first holds a queue reference, so avoid any
serialization races with queue freezes and can safely proceed with
dispatching that request to the driver. This potentially increases a
timing window from when a driver wants to freeze its queue to when
requests stop being dispatched. That scenario is off the fast path
though, and drivers need to appropriately handle requests during a
freeze request anyway.
The downside is the popped element needs to be individually freed when
we performed a bio plug merge. The cached request would have had to be
freed later anyway, but this patch does it inline with building the plug
list instead of after flushing it.
Fixes: b0077e269f6c1 ("blk-mq: make sure active queue usage is held for bio_integrity_prep()")
Fixes: 7b4f36cd22a65 ("block: ensure we hold a queue reference when using queue limits")
Signed-off-by: Keith Busch <kbusch@kernel.org>
---
v2->v3:
This pops the cached requests first. It's simpler this way and I don't
see any strong reason against it.
block/blk-mq.c | 34 +++++++++-------------------------
1 file changed, 9 insertions(+), 25 deletions(-)
diff --git a/block/blk-mq.c b/block/blk-mq.c
index d0c37daf568f2..28c2d931e75ea 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -3077,7 +3077,7 @@ static struct request *blk_mq_get_new_requests(struct request_queue *q,
/*
* Check if there is a suitable cached request and return it.
*/
-static struct request *blk_mq_peek_cached_request(struct blk_plug *plug,
+static struct request *blk_mq_get_cached_request(struct blk_plug *plug,
struct request_queue *q, blk_opf_t opf)
{
enum hctx_type type = blk_mq_get_hctx_type(opf);
@@ -3093,27 +3093,10 @@ static struct request *blk_mq_peek_cached_request(struct blk_plug *plug,
return NULL;
if (op_is_flush(rq->cmd_flags) != op_is_flush(opf))
return NULL;
+ rq_list_pop(&plug->cached_rqs);
return rq;
}
-static void blk_mq_use_cached_rq(struct request *rq, struct blk_plug *plug,
- struct bio *bio)
-{
- if (rq_list_pop(&plug->cached_rqs) != rq)
- WARN_ON_ONCE(1);
-
- /*
- * If any qos ->throttle() end up blocking, we will have flushed the
- * plug and hence killed the cached_rq list as well. Pop this entry
- * before we throttle.
- */
- rq_qos_throttle(rq->q, bio);
-
- blk_mq_rq_time_init(rq, blk_time_get_ns());
- rq->cmd_flags = bio->bi_opf;
- INIT_LIST_HEAD(&rq->queuelist);
-}
-
static bool bio_unaligned(const struct bio *bio, struct request_queue *q)
{
unsigned int bs_mask = queue_logical_block_size(q) - 1;
@@ -3152,7 +3135,7 @@ void blk_mq_submit_bio(struct bio *bio)
/*
* If the plug has a cached request for this queue, try to use it.
*/
- rq = blk_mq_peek_cached_request(plug, q, bio->bi_opf);
+ rq = blk_mq_get_cached_request(plug, q, bio->bi_opf);
/*
* A BIO that was released from a zone write plug has already been
@@ -3211,7 +3194,10 @@ void blk_mq_submit_bio(struct bio *bio)
new_request:
if (rq) {
- blk_mq_use_cached_rq(rq, plug, bio);
+ rq_qos_throttle(rq->q, bio);
+ blk_mq_rq_time_init(rq, blk_time_get_ns());
+ rq->cmd_flags = bio->bi_opf;
+ INIT_LIST_HEAD(&rq->queuelist);
} else {
rq = blk_mq_get_new_requests(q, plug, bio);
if (unlikely(!rq)) {
@@ -3257,12 +3243,10 @@ void blk_mq_submit_bio(struct bio *bio)
return;
queue_exit:
- /*
- * Don't drop the queue reference if we were trying to use a cached
- * request and thus didn't acquire one.
- */
if (!rq)
blk_queue_exit(q);
+ else
+ blk_mq_free_request(rq);
}
#ifdef CONFIG_BLK_MQ_STACKING
--
2.53.0-Meta
^ permalink raw reply related
* Re: [PATCH] bfq: update outdated comment
From: Yu Kuai @ 2026-05-21 15:33 UTC (permalink / raw)
To: Julia Lawall, Yu Kuai
Cc: yunbolyu, kexinsun, ratnadiraw, xutong.ma, Jens Axboe,
linux-block, linux-kernel
In-Reply-To: <20251231170117.143488-1-Julia.Lawall@inria.fr>
在 2026/1/1 1:01, Julia Lawall 写道:
> The function bfq_bfqq_may_idle() was renamed as bfq_better_to_idle()
> in commit 277a4a9b56cd ("block, bfq: give a better name to
> bfq_bfqq_may_idle"). Update the comment accordingly.
>
> Signed-off-by: Julia Lawall<Julia.Lawall@inria.fr>
>
> ---
> block/bfq-iosched.h | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
Reviewed-by: Yu Kuai <yukuai@fygo.io>
--
Thansk,
Kuai
^ permalink raw reply
* Re: [PATCH] blk-mq: always take a queue reference in blk_mq_submit_bio
From: Jens Axboe @ 2026-05-21 15:12 UTC (permalink / raw)
To: Christoph Hellwig; +Cc: kbusch, linux-block
In-Reply-To: <20260520084905.1092158-1-hch@lst.de>
On 5/20/26 2:49 AM, Christoph Hellwig wrote:
> When submitting a bio to blk-mq, if the task should sleep after peeking
> a cached request, but before it pops it, the plug flushes and calls
> blk_mq_free_plug_rqs, freeing the cached_rqs. This creates a
> use-after-free bug.
>
> Fix this by alway grabbing a queue usage reference in blk_mq_submit_bio.
> While past commit claims that this is slow, we're better safe than
> fast as a first priority.
>
> The code had already warned of this possibility, and specifically popped
> the request before other known blocking calls, but it didn't handle a
> blocking GFP_NOIO alloc. Under memory pressure, allocating the split bio
> or the integrity payload are two such cases that can block. The blk-mq
> submit_bio function continues using the peeked request that was already
> freed and re-initialized, so the driver receives that request with a
> NULL'ed mq_hctx, and inevitably panics.
>
> Large parts of the commit message are stolen from an earlier attempt
> to fix this issue by Keith Busch <kbusch@kernel.org>.
This is about a 5% regression in peak performance, fwiw. I'm all for
eliminating this issue, but this kind of big hammer approach is pretty
crap in terms of adding overhead to the IO path. Maybe we just cover
blocking split bio case, and look into doing a proper fix for 7.2 that
isn't such a massive regression?
--
Jens Axboe
^ permalink raw reply
* Re:Re: [PATCH] block, bfq: skip dispatch when selected queue has no next_rq
From: 李佑鸿 @ 2026-05-21 9:43 UTC (permalink / raw)
To: yukuai; +Cc: linux-block, axboe, liyouhong
In-Reply-To: <f0c0ed75-0858-4464-b22f-d64a6e3048cd@fygo.io>
At 2026-05-21 17:27:28, "Yu Kuai" <yukuai@fnnas.com> wrote:
>Hi,
>
>在 2026/5/20 17:50, dayou5941@163.com 写道:
>> From: liyouhong <liyouhong@kylinos.cn>
>>
>> bfq_dispatch_rq_from_bfqq() dispatches bfqq->next_rq directly. Add a
>> guard in __bfq_dispatch_request() so that dispatch is skipped if the
>> selected queue unexpectedly has no next request.
>>
>> This keeps behavior unchanged in normal paths while avoiding entering
>> the dispatch helper with a missing next_rq.
>
>Can you explan in which case bfqq can be returned from bfq_select_queue
>with next_rq set to NULL? I didn't find it with a quick review.
>
>Take a look at bfq_dispatch_rq_from_bfqq(), bfqq->next_rq will be dereferenced
>unconditionally, which should lead to kernel crash before this patch if
>next_rq can be NULL.
>
Thanks for the clarification.
I agree there is no demonstrated path for `next_rq == NULL` here, so I'll drop
this patch.
One follow-up question: if `next_rq` is guaranteed non-NULL after
`bfq_select_queue()`, would you consider the `if (rq)` check after
`bfq_dispatch_rq_from_bfqq()` redundant for that path?
Thanks,
liyouhong
^ permalink raw reply
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