[bvanassche:block-scsi-iops] [scsi] fb5a7f1b2b: INFO:task_blocked_for_more_than#seconds

[bvanassche:block-scsi-iops] [scsi] fb5a7f1b2b: INFO:task_blocked_for_more_than#seconds

[kernel test robot]

Hello,

kernel test robot noticed "INFO:task_blocked_for_more_than#seconds" on:

commit: fb5a7f1b2bb3442ab270404463be4f0d7578295f ("scsi: core: Improve IOPS in case of host-wide tags")
https://github.com/bvanassche/linux block-scsi-iops

in testcase: boot

config: x86_64-kexec
compiler: clang-20
test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 32G

(please refer to attached dmesg/kmsg for entire log/backtrace)


+-----------------------------------------+------------+------------+
|                                         | 0997980774 | fb5a7f1b2b |
+-----------------------------------------+------------+------------+
| boot_successes                          | 12         | 0          |
| boot_failures                           | 0          | 12         |
| INFO:task_blocked_for_more_than#seconds | 0          | 12         |
| BUG:kernel_hang_in_boot_stage           | 0          | 12         |
+-----------------------------------------+------------+------------+


If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <oliver.sang@intel.com>
| Closes: https://lore.kernel.org/oe-lkp/202511201331.ab9300d2-lkp@intel.com


[  972.310477][   T31] INFO: task swapper/0:1 blocked for more than 491 seconds.
[  972.325924][   T31]       Not tainted 6.18.0-rc1-00154-gfb5a7f1b2bb3 #1
[  972.328555][   T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  972.331938][   T31] task:swapper/0       state:D stack:0     pid:1     tgid:1     ppid:0      task_flags:0x0040 flags:0x00080000
[  972.337218][   T31] Call Trace:
[  972.338813][   T31]  <TASK>
[  972.340068][   T31]  __schedule (kernel/sched/core.c:5328)
[  972.347907][   T31]  ? prepare_to_wait_event (kernel/sched/wait.c:317)
[  972.350544][   T31]  schedule (arch/x86/include/asm/preempt.h:85 kernel/sched/core.c:7012 kernel/sched/core.c:7026)
[  972.352679][   T31]  async_synchronize_cookie_domain (kernel/async.c:317)
[  972.355241][   T31]  ? __pfx_autoremove_wake_function (kernel/sched/wait.c:402)
[  972.357773][   T31]  wait_for_device_probe (drivers/base/dd.c:777)
[  972.364734][   T31]  ? __pfx_autoremove_wake_function (kernel/sched/wait.c:402)
[  972.367566][   T31]  wait_for_devices (net/ipv4/ipconfig.c:1452)
[  972.369621][   T31]  ip_auto_config (net/ipv4/ipconfig.c:1510)
[  972.371610][   T31]  ? __pfx_ip_auto_config (net/ipv4/ipconfig.c:1477)
[  972.373727][   T31]  do_one_initcall (init/main.c:1283)
[  972.375828][   T31]  ? __alloc_frozen_pages_noprof (mm/page_alloc.c:5183)
[  972.378358][   T31]  ? alloc_pages_mpol (mm/mempolicy.c:2416)
[  972.380533][   T31]  ? new_slab (mm/slub.c:631 mm/slub.c:3250 mm/slub.c:3266)
[  972.382406][   T31]  ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1052)
[  972.385612][   T31]  ? asm_sysvec_apic_timer_interrupt (arch/x86/include/asm/idtentry.h:697)
[  972.388164][   T31]  ? __pfx_ignore_unknown_bootoption (init/main.c:1329)
[  972.390842][   T31]  ? strlen (lib/string.c:420)
[  972.392746][   T31]  ? parameq (kernel/params.c:90 kernel/params.c:99)
[  972.394571][   T31]  ? __pfx_ignore_unknown_bootoption (init/main.c:1329)
[  972.397175][   T31]  ? parse_args (kernel/params.c:153 kernel/params.c:186)
[  972.399055][   T31]  do_initcall_level (init/main.c:1344)
[  972.401133][   T31]  do_initcalls (init/main.c:1358)
[  972.402859][   T31]  kernel_init_freeable (init/main.c:1597)
[  972.404994][   T31]  ? __pfx_kernel_init (init/main.c:1475)
[  972.406897][   T31]  kernel_init (init/main.c:1485)
[  972.409309][   T31]  ret_from_fork (arch/x86/kernel/process.c:164)
[  972.411068][   T31]  ? __pfx_kernel_init (init/main.c:1475)
[  972.413229][   T31]  ret_from_fork_asm (arch/x86/entry/entry_64.S:255)
[  972.415613][   T31]  </TASK>
BUG: kernel hang in boot stage


The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20251120/202511201331.ab9300d2-lkp@intel.com



-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

Re: [bvanassche:block-scsi-iops] [scsi] fb5a7f1b2b: INFO:task_blocked_for_more_than#seconds

[Bart Van Assche]

On 11/19/25 9:59 PM, kernel test robot wrote:
> kernel test robot noticed "INFO:task_blocked_for_more_than#seconds" on:
> 
> commit: fb5a7f1b2bb3442ab270404463be4f0d7578295f ("scsi: core: Improve IOPS in case of host-wide tags")
> https://github.com/bvanassche/linux block-scsi-iops
> 
> in testcase: boot

The root cause of this hang has been identified and a fix has been
pushed out to https://github.com/bvanassche/linux block-scsi-iops.
Let's see whether the kernel test robot is happy with the new
implementation :-)

Bart.

Re: [bvanassche:block-scsi-iops] [scsi] fb5a7f1b2b: INFO:task_blocked_for_more_than#seconds

[Oliver Sang]

hi, Bart,

On Fri, Nov 21, 2025 at 01:15:27PM -0800, Bart Van Assche wrote:
> On 11/19/25 9:59 PM, kernel test robot wrote:
> > kernel test robot noticed "INFO:task_blocked_for_more_than#seconds" on:
> > 
> > commit: fb5a7f1b2bb3442ab270404463be4f0d7578295f ("scsi: core: Improve IOPS in case of host-wide tags")
> > https://github.com/bvanassche/linux block-scsi-iops
> > 
> > in testcase: boot
> 
> The root cause of this hang has been identified and a fix has been
> pushed out to https://github.com/bvanassche/linux block-scsi-iops.
> Let's see whether the kernel test robot is happy with the new
> implementation :-)

we tested on the new tip of the branch:
272816567e072 (bvanassche/block-scsi-iops) scsi: core: Improve IOPS in case of host-wide tags

confirmed the issue we reported now gone. thanks

Tested-by: kernel test robot <oliver.sang@intel.com>

> 
> Bart.