From: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>
To: Julian Sun <sunjunchao@bytedance.com>
Cc: linux-block@vger.kernel.org, jack@suse.cz, axboe@kernel.dk,
viro@zeniv.linux.org.uk, mcgrof@kernel.org, djwong@kernel.org,
tz2294@columbia.edu
Subject: Re: [PATCH 2/2] block: take the inode lock for buffered write fallback
Date: Tue, 27 Oct 2026 13:24:07 +0900 [thread overview]
Message-ID: <auAmMShKl4S2lc1u@shinmob> (raw)
In-Reply-To: <20261015091105.1315605-3-sunjunchao@bytedance.com>
CC+: Tal Zassman,
On Oct 15, 2026 / 17:11, Julian Sun wrote:
> Commit c0e473a0d226 ("block: fix race between set_blocksize and read
> paths") added shared inode locking around ordinary buffered writes,
> but missed the direct-I/O fallback path.
>
> Move the lock into blkdev_buffered_write() so both paths serialize
> with set_blocksize().
>
> Also correct the comment claiming that this path takes invalidate_lock;
> it only takes i_rwsem.
>
> Fixes: c0e473a0d226 ("block: fix race between set_blocksize and read paths")
> Signed-off-by: Julian Sun <sunjunchao@bytedance.com>
When I checking the new blktests test case block/050 by Tal Zussman [1], I found
the test case hangs [2]. I bisected and this kernel change triggers the hang.
Julian, may I ask you to take a look in the hang?
[1] https://lore.kernel.org/linux-block/20261015-blkdev-fixes-tests-v3-1-b6ffa6410514@columbia.edu/
[2] dmesg during test case hang
[ 93.055848] [ T1042] run blktests block/050 at 2026-10-27 13:15:20.266665152
[ 93.132099] [ T1042] null_blk: disk nullb1 created
[ 93.204476] [ T1088] ============================================
[ 93.205320] [ T1088] WARNING: possible recursive locking detected
[ 93.206137] [ T1088] 7.3.0-rc2+ #715 Not tainted
[ 93.206784] [ T1088] --------------------------------------------
[ 93.207569] [ T1088] dio-fallback-ra/1088 is trying to acquire lock:
[ 93.208415] [ T1088] ffff888100452a78 (&sb->s_type->i_mutex_key#13){++++}-{4:4}, at: blkdev_write_iter+0x928/0xf40
[ 93.209769] [ T1088]
but task is already holding lock:
[ 93.210736] [ T1088] ffff888100452a78 (&sb->s_type->i_mutex_key#13){++++}-{4:4}, at: blkdev_write_iter+0x882/0xf40
[ 93.212048] [ T1088]
other info that might help us debug this:
[ 93.213080] [ T1088] Possible unsafe locking scenario:
[ 93.214051] [ T1088] CPU0
[ 93.214501] [ T1088] ----
[ 93.214934] [ T1088] lock(&sb->s_type->i_mutex_key#13);
[ 93.215671] [ T1088] lock(&sb->s_type->i_mutex_key#13);
[ 93.216370] [ T1088]
*** DEADLOCK ***
[ 93.217409] [ T1088] May be due to missing lock nesting notation
[ 93.218468] [ T1088] locks held by dio-fallback-ra/1088: 1, last CPU#1:
[ 93.219343] [ T1088] #0: ffff888100452a78 (&sb->s_type->i_mutex_key#13){++++}-{4:4}, at: blkdev_write_iter+0x882/0xf40
[ 93.220736] [ T1088]
stack backtrace:
[ 93.221490] [ T1088] CPU: 1 UID: 0 PID: 1088 Comm: dio-fallback-ra Not tainted 7.3.0-rc2+ #715 PREEMPT(full)
[ 93.222766] [ T1088] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.17.0-10.fc44 06/10/2025
[ 93.223972] [ T1088] Call Trace:
[ 93.224415] [ T1088] <TASK>
[ 93.224801] [ T1088] dump_stack_lvl+0x6a/0x90
[ 93.225381] [ T1088] print_deadlock_bug.cold+0xc0/0xcd
[ 93.226033] [ T1088] __lock_acquire+0x1536/0x2490
[ 93.226705] [ T1088] lock_acquire+0x1b1/0x340
[ 93.227262] [ T1088] ? blkdev_write_iter+0x928/0xf40
[ 93.227880] [ T1088] ? __pfx___might_resched+0x10/0x10
[ 93.228538] [ T1088] down_read+0xa6/0x540
[ 93.229049] [ T1088] ? blkdev_write_iter+0x928/0xf40
[ 93.229754] [ T1088] ? __pfx_down_read+0x10/0x10
[ 93.230374] [ T1088] ? filemap_check_errors+0x58/0x100
[ 93.231040] [ T1088] blkdev_write_iter+0x928/0xf40
[ 93.231722] [ T1088] do_iter_readv_writev+0x48a/0xb80
[ 93.232382] [ T1088] ? __pfx_folio_add_lru_vma+0x10/0x10
[ 93.233070] [ T1088] ? rcu_read_unlock+0x1c/0x60
[ 93.233764] [ T1088] ? __folio_mod_stat+0x4c/0x190
[ 93.234399] [ T1088] ? __pfx_do_iter_readv_writev+0x10/0x10
[ 93.235108] [ T1088] ? folio_add_new_anon_rmap+0x34f/0xd40
[ 93.235860] [ T1088] ? selinux_file_permission+0x3c0/0x530
[ 93.236577] [ T1088] ? security_file_permission+0x44/0xc0
[ 93.237316] [ T1088] ? rw_verify_area+0x77/0x650
[ 93.237917] [ T1088] vfs_writev+0x27d/0xbc0
[ 93.238484] [ T1088] ? __pfx_vfs_writev+0x10/0x10
[ 93.239095] [ T1088] ? __handle_mm_fault+0x1584/0x1fb0
[ 93.239816] [ T1088] ? lock_acquire+0x1b1/0x340
[ 93.240425] [ T1088] ? __fget_files+0x1d8/0x440
[ 93.241021] [ T1088] ? do_pwritev+0x18a/0x300
[ 93.241653] [ T1088] do_pwritev+0x18a/0x300
[ 93.242183] [ T1088] ? __pfx_do_pwritev+0x10/0x10
[ 93.242837] [ T1088] ? lock_release+0x1b5/0x340
[ 93.243451] [ T1088] ? rcu_is_watching+0x12/0xb0
[ 93.244054] [ T1088] do_syscall_64+0xf2/0x690
[ 93.244688] [ T1088] ? do_syscall_64+0x2d/0x690
[ 93.245277] [ T1088] ? trace_hardirqs_off_finish+0x139/0x180
[ 93.246010] [ T1088] ? lockdep_hardirqs_off+0xaf/0xf0
[ 93.246724] [ T1088] ? do_syscall_64+0x60/0x690
[ 93.247325] [ T1088] entry_SYSCALL_64_after_hwframe+0x76/0x7e
[ 93.248054] [ T1088] RIP: 0033:0x7f1cae028e32
[ 93.248676] [ T1088] Code: 08 0f 85 91 41 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 <c3> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 f3 0f 1e fa 55 bf 01 00
[ 93.251120] [ T1088] RSP: 002b:00007f1cadf98d98 EFLAGS: 00000246 ORIG_RAX: 0000000000000128
[ 93.252230] [ T1088] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f1cae028e32
[ 93.253253] [ T1088] RDX: 0000000000000002 RSI: 00007f1cadf98e20 RDI: 0000000000000004
[ 93.254275] [ T1088] RBP: 00007f1cadf98dc0 R08: 0000000000000000 R09: 0000000000000000
[ 93.255295] [ T1088] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f1ca8001000
[ 93.256307] [ T1088] R13: 00007fff0eee6560 R14: 0000000000000000 R15: 00007fff0eee6667
[ 93.257329] [ T1088] </TASK>
[ 247.593474] [ T48] INFO: task dio-fallback-ra:1088 blocked for more than 122 seconds.
[ 247.595947] [ T48] Not tainted 7.3.0-rc2+ #715
[ 247.598101] [ T48] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 247.599361] [ T48] task:dio-fallback-ra state:D stack:0 pid:1088 tgid:1087 ppid:1042 task_flags:0x400040 flags:0x00080000
[ 247.599727] [ T48] Call Trace:
[ 247.600141] [ T48] <TASK>
[ 247.600524] [ T48] __schedule+0x1fcc/0x6ef0
[ 247.600905] [ T48] ? asm_sysvec_apic_timer_interrupt+0x16/0x20
[ 247.601293] [ T48] ? trace_hardirqs_on+0x14/0x190
[ 247.601670] [ T48] ? __pfx___schedule+0x10/0x10
[ 247.602045] [ T48] ? lock_acquire+0x2f5/0x340
[ 247.602430] [ T48] ? lock_acquire+0x2f5/0x340
[ 247.602801] [ T48] ? rcu_is_watching+0x12/0xb0
[ 247.603182] [ T48] ? lock_release+0x285/0x340
[ 247.603549] [ T48] schedule+0xe3/0x2e0
[ 247.603917] [ T48] ? rwsem_down_read_slowpath+0x31e/0x10d0
[ 247.604296] [ T48] schedule_preempt_disabled+0x14/0x30
[ 247.604665] [ T48] rwsem_down_read_slowpath+0x61a/0x10d0
[ 247.605050] [ T48] ? __pfx_rwsem_down_read_slowpath+0x10/0x10
[ 247.605412] [ T48] ? __pfx___might_resched+0x10/0x10
[ 247.605765] [ T48] down_read+0xfa/0x540
[ 247.606110] [ T48] ? __pfx_down_read+0x10/0x10
[ 247.606889] [ T48] ? filemap_check_errors+0x58/0x100
[ 247.607286] [ T48] blkdev_write_iter+0x928/0xf40
[ 247.607634] [ T48] do_iter_readv_writev+0x48a/0xb80
[ 247.607987] [ T48] ? __pfx_folio_add_lru_vma+0x10/0x10
[ 247.608348] [ T48] ? rcu_read_unlock+0x1c/0x60
[ 247.608707] [ T48] ? __folio_mod_stat+0x4c/0x190
[ 247.609083] [ T48] ? __pfx_do_iter_readv_writev+0x10/0x10
[ 247.609445] [ T48] ? folio_add_new_anon_rmap+0x34f/0xd40
[ 247.609802] [ T48] ? selinux_file_permission+0x3c0/0x530
[ 247.610167] [ T48] ? security_file_permission+0x44/0xc0
[ 247.610521] [ T48] ? rw_verify_area+0x77/0x650
[ 247.610878] [ T48] vfs_writev+0x27d/0xbc0
[ 247.611244] [ T48] ? __pfx_vfs_writev+0x10/0x10
[ 247.611611] [ T48] ? __handle_mm_fault+0x1584/0x1fb0
[ 247.611971] [ T48] ? lock_acquire+0x1b1/0x340
[ 247.612375] [ T48] ? __fget_files+0x1d8/0x440
[ 247.612731] [ T48] ? do_pwritev+0x18a/0x300
[ 247.613115] [ T48] do_pwritev+0x18a/0x300
[ 247.613472] [ T48] ? __pfx_do_pwritev+0x10/0x10
[ 247.613849] [ T48] ? lock_release+0x1b5/0x340
[ 247.614160] [ T48] ? rcu_is_watching+0x12/0xb0
[ 247.614478] [ T48] do_syscall_64+0xf2/0x690
[ 247.614823] [ T48] ? do_syscall_64+0x2d/0x690
[ 247.615146] [ T48] ? trace_hardirqs_off_finish+0x139/0x180
[ 247.615457] [ T48] ? lockdep_hardirqs_off+0xaf/0xf0
[ 247.615759] [ T48] ? do_syscall_64+0x60/0x690
[ 247.616054] [ T48] entry_SYSCALL_64_after_hwframe+0x76/0x7e
[ 247.616360] [ T48] RIP: 0033:0x7f1cae028e32
[ 247.616652] [ T48] RSP: 002b:00007f1cadf98d98 EFLAGS: 00000246 ORIG_RAX: 0000000000000128
[ 247.616984] [ T48] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f1cae028e32
[ 247.617287] [ T48] RDX: 0000000000000002 RSI: 00007f1cadf98e20 RDI: 0000000000000004
[ 247.617571] [ T48] RBP: 00007f1cadf98dc0 R08: 0000000000000000 R09: 0000000000000000
[ 247.617850] [ T48] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f1ca8001000
[ 247.618139] [ T48] R13: 00007fff0eee6560 R14: 0000000000000000 R15: 00007fff0eee6667
[ 247.618423] [ T48] </TASK>
[ 247.618698] [ T48] INFO: task dio-fallback-ra:1088 is blocked on an rw-semaphore, but the owner is not found.
[ 247.618995] [ T48] INFO: task dio-fallback-ra:1089 blocked for more than 122 seconds.
[ 247.619302] [ T48] Not tainted 7.3.0-rc2+ #715
[ 247.619669] [ T48] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 247.619997] [ T48] task:dio-fallback-ra state:D stack:0 pid:1089 tgid:1087 ppid:1042 task_flags:0x400040 flags:0x00080000
[ 247.620340] [ T48] Call Trace:
[ 247.620660] [ T48] <TASK>
[ 247.620982] [ T48] __schedule+0x1fcc/0x6ef0
[ 247.621349] [ T48] ? __pfx_bio_wait_end_io+0x10/0x10
[ 247.621671] [ T48] ? __pfx___schedule+0x10/0x10
[ 247.622021] [ T48] ? lock_acquire+0x2f5/0x340
[ 247.622349] [ T48] ? lock_acquire+0x2f5/0x340
[ 247.622659] [ T48] ? rcu_is_watching+0x12/0xb0
[ 247.622973] [ T48] ? lock_release+0x285/0x340
[ 247.623294] [ T48] schedule+0xe3/0x2e0
[ 247.623602] [ T48] ? rwsem_down_read_slowpath+0x31e/0x10d0
[ 247.623957] [ T48] schedule_preempt_disabled+0x14/0x30
[ 247.624285] [ T48] rwsem_down_read_slowpath+0x61a/0x10d0
[ 247.624637] [ T48] ? __pfx_rwsem_down_read_slowpath+0x10/0x10
[ 247.624955] [ T48] ? blkdev_direct_IO+0x86f/0x1c50
[ 247.625322] [ T48] ? __pfx___might_resched+0x10/0x10
[ 247.625638] [ T48] down_read+0xfa/0x540
[ 247.625985] [ T48] ? __pfx_down_read+0x10/0x10
[ 247.626309] [ T48] ? filemap_check_errors+0x58/0x100
[ 247.626622] [ T48] blkdev_write_iter+0x882/0xf40
[ 247.626979] [ T48] do_iter_readv_writev+0x48a/0xb80
[ 247.627306] [ T48] ? vfs_writev+0x831/0xbc0
[ 247.627618] [ T48] ? __pfx_do_iter_readv_writev+0x10/0x10
[ 247.627976] [ T48] ? selinux_file_permission+0x3c0/0x530
[ 247.628303] [ T48] ? security_file_permission+0x44/0xc0
[ 247.628621] [ T48] ? rw_verify_area+0x77/0x650
[ 247.628941] [ T48] vfs_writev+0x27d/0xbc0
[ 247.629307] [ T48] ? __pfx_vfs_writev+0x10/0x10
[ 247.629628] [ T48] ? __fget_files+0x4f/0x440
[ 247.629981] [ T48] ? __fget_files+0x1d8/0x440
[ 247.630309] [ T48] ? do_pwritev+0x18a/0x300
[ 247.630623] [ T48] do_pwritev+0x18a/0x300
[ 247.630941] [ T48] ? __pfx_do_pwritev+0x10/0x10
[ 247.631265] [ T48] ? lock_release+0x1b5/0x340
[ 247.631577] [ T48] ? rcu_is_watching+0x12/0xb0
[ 247.631918] [ T48] do_syscall_64+0xf2/0x690
[ 247.632239] [ T48] ? rcu_read_unlock+0x17/0x60
[ 247.632548] [ T48] ? lock_release+0x1b5/0x340
[ 247.633267] [ T48] ? __handle_mm_fault+0x1584/0x1fb0
[ 247.633573] [ T48] ? __lock_acquire+0x54a/0x2490
[ 247.633875] [ T48] ? __pfx___css_rstat_updated+0x10/0x10
[ 247.634190] [ T48] ? lock_acquire+0x1b1/0x340
[ 247.634485] [ T48] ? rcu_is_watching+0x12/0xb0
[ 247.634783] [ T48] ? count_memcg_events+0x107/0x4c0
[ 247.635099] [ T48] ? find_held_lock+0x2b/0x80
[ 247.635397] [ T48] ? rcu_read_unlock+0x17/0x60
[ 247.635674] [ T48] ? lock_release+0x1b5/0x340
[ 247.635991] [ T48] ? find_held_lock+0x2b/0x80
[ 247.636308] [ T48] ? exc_page_fault+0x94/0x140
[ 247.636563] [ T48] ? lock_release+0x1b5/0x340
[ 247.636853] [ T48] ? rcu_is_watching+0x12/0xb0
[ 247.637100] [ T48] ? do_syscall_64+0x2d/0x690
[ 247.637359] [ T48] ? trace_hardirqs_off_finish+0x139/0x180
[ 247.637610] [ T48] ? lockdep_hardirqs_off+0xaf/0xf0
[ 247.637864] [ T48] ? do_syscall_64+0x60/0x690
[ 247.638113] [ T48] entry_SYSCALL_64_after_hwframe+0x76/0x7e
[ 247.638382] [ T48] RIP: 0033:0x7f1cae028e32
[ 247.638639] [ T48] RSP: 002b:00007f1cad797d98 EFLAGS: 00000246 ORIG_RAX: 0000000000000128
[ 247.638977] [ T48] RAX: ffffffffffffffda RBX: 0000000000004000 RCX: 00007f1cae028e32
[ 247.639260] [ T48] RDX: 0000000000000002 RSI: 00007f1cad797e20 RDI: 0000000000000005
[ 247.639534] [ T48] RBP: 00007f1cad797dc0 R08: 0000000000000000 R09: 0000000000000000
[ 247.639810] [ T48] R10: 0000000000004000 R11: 0000000000000246 R12: 00007f1c9c001000
[ 247.640082] [ T48] R13: 00007fff0eee6560 R14: 0000000000000000 R15: 00007fff0eee6667
[ 247.640368] [ T48] </TASK>
[ 247.640636] [ T48] INFO: task dio-fallback-ra:1089 is blocked on an rw-semaphore, but the owner is not found.
[ 247.640926] [ T48] INFO: task dio-fallback-ra:1091 blocked for more than 122 seconds.
[ 247.641225] [ T48] Not tainted 7.3.0-rc2+ #715
[ 247.641512] [ T48] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 247.641813] [ T48] task:dio-fallback-ra state:D stack:0 pid:1091 tgid:1087 ppid:1042 task_flags:0x400040 flags:0x00080000
[ 247.642139] [ T48] Call Trace:
[ 247.642446] [ T48] <TASK>
[ 247.642753] [ T48] __schedule+0x1fcc/0x6ef0
[ 247.643060] [ T48] ? blk_stat_add+0xbc/0x450
[ 247.643380] [ T48] ? rcu_is_watching+0x12/0xb0
[ 247.643685] [ T48] ? lock_release+0x285/0x340
[ 247.644028] [ T48] ? percpu_ref_put_many.constprop.0+0x39/0x1d0
[ 247.644348] [ T48] ? __pfx___schedule+0x10/0x10
[ 247.644655] [ T48] ? lock_acquire+0x2f5/0x340
[ 247.644964] [ T48] ? lock_acquire+0x2f5/0x340
[ 247.645318] [ T48] ? rcu_is_watching+0x12/0xb0
[ 247.645624] [ T48] ? lock_release+0x285/0x340
[ 247.645973] [ T48] schedule+0xe3/0x2e0
[ 247.646357] [ T48] ? rwsem_down_read_slowpath+0x31e/0x10d0
[ 247.646687] [ T48] schedule_preempt_disabled+0x14/0x30
[ 247.647028] [ T48] rwsem_down_read_slowpath+0x61a/0x10d0
[ 247.647354] [ T48] ? __pfx_rwsem_down_read_slowpath+0x10/0x10
[ 247.647669] [ T48] ? blk_mq_dispatch_queue_requests+0x51a/0x7e0
[ 247.648017] [ T48] ? blk_mq_dispatch_queue_requests+0x576/0x7e0
[ 247.648342] [ T48] ? __pfx_folio_batch_move_lru+0x10/0x10
[ 247.648658] [ T48] ? __pfx___might_resched+0x10/0x10
[ 247.649023] [ T48] down_read+0xfa/0x540
[ 247.649345] [ T48] ? __pfx_down_read+0x10/0x10
[ 247.649657] [ T48] ? __blk_flush_plug+0x29f/0x540
[ 247.649971] [ T48] ? selinux_file_permission+0x3c0/0x530
[ 247.650296] [ T48] ? security_file_permission+0x44/0xc0
[ 247.650610] [ T48] blkdev_read_iter+0x15a/0x4e0
[ 247.650927] [ T48] ? rw_verify_area+0x77/0x650
[ 247.651254] [ T48] vfs_read+0x6f4/0xb30
[ 247.651569] [ T48] ? blk_finish_plug+0x52/0xc0
[ 247.651887] [ T48] ? __pfx_vfs_read+0x10/0x10
[ 247.652243] [ T48] ? lock_release+0x285/0x340
[ 247.652560] [ T48] __x64_sys_pread64+0x18d/0x250
[ 247.652910] [ T48] ? __pfx___x64_sys_pread64+0x10/0x10
[ 247.653237] [ T48] ? rcu_is_watching+0x12/0xb0
[ 247.653552] [ T48] ? rcu_is_watching+0x12/0xb0
[ 247.653864] [ T48] ? do_syscall_64+0x7f/0x690
[ 247.654182] [ T48] do_syscall_64+0xf2/0x690
[ 247.654485] [ T48] ? force_page_cache_ra+0x21c/0x370
[ 247.654857] [ T48] ? generic_fadvise+0x35c/0x660
[ 247.655180] [ T48] ? __pfx_generic_fadvise+0x10/0x10
[ 247.655488] [ T48] ? rcu_is_watching+0x12/0xb0
[ 247.655786] [ T48] ? lock_release+0x285/0x340
[ 247.656078] [ T48] ? __fget_files+0x1d8/0x440
[ 247.656381] [ T48] ? fput+0x1b/0xa0
[ 247.656658] [ T48] ? fput+0x48/0xa0
[ 247.656969] [ T48] ? rcu_is_watching+0x12/0xb0
[ 247.657247] [ T48] ? do_syscall_64+0x1ff/0x690
[ 247.657507] [ T48] ? trace_hardirqs_on_prepare+0x139/0x180
[ 247.657806] [ T48] ? do_syscall_64+0x21d/0x690
[ 247.658049] [ T48] ? vfs_read+0x3b6/0xb30
[ 247.658305] [ T48] ? vfs_read+0x3b6/0xb30
[ 247.658547] [ T48] ? lock_acquire+0x1b1/0x340
[ 247.658792] [ T48] ? __pfx_vfs_read+0x10/0x10
[ 247.659034] [ T48] ? __fget_files+0x1ce/0x440
[ 247.659288] [ T48] ? lock_release+0x1b5/0x340
[ 247.659877] [ T48] ? fput+0x1b/0xa0
[ 247.660117] [ T48] ? fput+0x48/0xa0
[ 247.660364] [ T48] ? __x64_sys_pread64+0x1ad/0x250
[ 247.660604] [ T48] ? __pfx___x64_sys_pread64+0x10/0x10
[ 247.660884] [ T48] ? rcu_is_watching+0x12/0xb0
[ 247.661123] [ T48] ? do_syscall_64+0x1ff/0x690
[ 247.661407] [ T48] ? trace_hardirqs_on_prepare+0x139/0x180
[ 247.661649] [ T48] ? do_syscall_64+0x21d/0x690
[ 247.661939] [ T48] ? rcu_is_watching+0x12/0xb0
[ 247.662188] [ T48] ? do_syscall_64+0x2d/0x690
[ 247.662423] [ T48] ? trace_hardirqs_off_finish+0x139/0x180
[ 247.662658] [ T48] ? lockdep_hardirqs_off+0xaf/0xf0
[ 247.662900] [ T48] ? do_syscall_64+0x60/0x690
[ 247.663147] [ T48] entry_SYSCALL_64_after_hwframe+0x76/0x7e
[ 247.663388] [ T48] RIP: 0033:0x7f1cae028e32
[ 247.663626] [ T48] RSP: 002b:00007f1ca45fedc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000011
[ 247.663880] [ T48] RAX: ffffffffffffffda RBX: 0000000000002000 RCX: 00007f1cae028e32
[ 247.664144] [ T48] RDX: 0000000000002000 RSI: 00007f1c94000880 RDI: 0000000000000006
[ 247.664441] [ T48] RBP: 00007f1ca45fedf0 R08: 0000000000000000 R09: 0000000000000000
[ 247.664695] [ T48] R10: 0000000000002000 R11: 0000000000000246 R12: 00007f1c94000880
[ 247.664995] [ T48] R13: 00007fff0eee6540 R14: 0000000000000000 R15: 00007fff0eee6647
[ 247.665298] [ T48] </TASK>
[ 247.665551] [ T48] INFO: task dio-fallback-ra:1091 is blocked on an rw-semaphore, but the owner is not found.
[ 247.665869] [ T48] INFO: task dio-fallback-ra:1092 blocked for more than 122 seconds.
[ 247.666143] [ T48] Not tainted 7.3.0-rc2+ #715
[ 247.666429] [ T48] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 247.666719] [ T48] task:dio-fallback-ra state:D stack:0 pid:1092 tgid:1087 ppid:1042 task_flags:0x400140 flags:0x00080000
[ 247.667021] [ T48] Call Trace:
[ 247.667327] [ T48] <TASK>
[ 247.667661] [ T48] __schedule+0x1fcc/0x6ef0
[ 247.667966] [ T48] ? rcu_is_watching+0x12/0xb0
[ 247.668307] [ T48] ? __pfx___schedule+0x10/0x10
[ 247.668606] [ T48] ? lock_acquire+0x2f5/0x340
[ 247.668906] [ T48] ? lock_acquire+0x2f5/0x340
[ 247.669210] [ T48] ? rcu_is_watching+0x12/0xb0
[ 247.669503] [ T48] ? lock_release+0x285/0x340
[ 247.669800] [ T48] schedule+0xe3/0x2e0
[ 247.670092] [ T48] ? _raw_spin_unlock_irq+0x34/0x50
[ 247.670400] [ T48] schedule_preempt_disabled+0x14/0x30
[ 247.670700] [ T48] rwsem_down_write_slowpath+0x4b3/0x1830
[ 247.671006] [ T48] ? __pfx_rwsem_down_write_slowpath+0x10/0x10
[ 247.671323] [ T48] ? rcu_is_watching+0x12/0xb0
[ 247.671626] [ T48] ? lock_release+0x285/0x340
[ 247.671930] [ T48] ? __pfx___mutex_lock+0x10/0x10
[ 247.672245] [ T48] ? __pfx___might_resched+0x10/0x10
[ 247.672553] [ T48] down_write+0x1be/0x1f0
[ 247.672994] [ T48] ? __pfx_down_write+0x10/0x10
[ 247.673328] [ T48] ? bdev_open+0x90c/0xc60
[ 247.673644] [ T48] set_blocksize+0x1ad/0x460
[ 247.673956] [ T48] ? bdev_file_open_by_dev+0xe6/0x170
[ 247.674279] [ T48] blkdev_bszset+0x142/0x1e0
[ 247.674592] [ T48] ? __pfx_blkdev_bszset+0x10/0x10
[ 247.674937] [ T48] ? lock_acquire+0x2f5/0x340
[ 247.675263] [ T48] ? rcu_is_watching+0x12/0xb0
[ 247.675583] [ T48] blkdev_ioctl+0x4e9/0x5e0
[ 247.675932] [ T48] ? __pfx_blkdev_ioctl+0x10/0x10
[ 247.676257] [ T48] __x64_sys_ioctl+0x138/0x1c0
[ 247.676569] [ T48] do_syscall_64+0xf2/0x690
[ 247.676882] [ T48] ? rcu_read_unlock+0x1c/0x60
[ 247.677268] [ T48] ? handle_mm_fault+0x35f/0x660
[ 247.677608] [ T48] ? rcu_is_watching+0x12/0xb0
[ 247.677952] [ T48] ? lock_release+0x285/0x340
[ 247.678315] [ T48] ? rcu_is_watching+0x12/0xb0
[ 247.678667] [ T48] ? do_user_addr_fault+0x52e/0xaf0
[ 247.679008] [ T48] ? rcu_is_watching+0x12/0xb0
[ 247.679350] [ T48] ? do_syscall_64+0x2d/0x690
[ 247.679690] [ T48] ? trace_hardirqs_off_finish+0x139/0x180
[ 247.680034] [ T48] ? trace_hardirqs_off+0x14f/0x1a0
[ 247.680369] [ T48] ? do_syscall_64+0x60/0x690
[ 247.680690] [ T48] entry_SYSCALL_64_after_hwframe+0x76/0x7e
[ 247.681055] [ T48] RIP: 0033:0x7f1cae0a073d
[ 247.681399] [ T48] RSP: 002b:00007f1ca7ffedd0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[ 247.681773] [ T48] RAX: ffffffffffffffda RBX: 0000000000000200 RCX: 00007f1cae0a073d
[ 247.682088] [ T48] RDX: 00007f1ca7ffee3c RSI: 0000000040081271 RDI: 0000000000000003
[ 247.682386] [ T48] RBP: 00007f1ca7ffee20 R08: 0000000000000000 R09: 00007f1ca7fff6c0
[ 247.682710] [ T48] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000021
[ 247.683016] [ T48] R13: 00007fff0eee6540 R14: 0000000000000000 R15: 00007fff0eee6647
[ 247.683330] [ T48] </TASK>
[ 247.683643] [ T48] INFO: task dio-fallback-ra:1092 is blocked on an rw-semaphore, but the owner is not found.
[ 247.683985] [ T48] INFO: lockdep is turned off.
[ 370.473396] [ T48] INFO: task dio-fallback-ra:1088 blocked for more than 245 seconds.
[ 370.475679] [ T48] Not tainted 7.3.0-rc2+ #715
[ 370.477650] [ T48] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 370.479255] [ T48] task:dio-fallback-ra state:D stack:0 pid:1088 tgid:1087 ppid:1042 task_flags:0x400040 flags:0x00080000
[ 370.479690] [ T48] Call Trace:
[ 370.480085] [ T48] <TASK>
[ 370.480454] [ T48] __schedule+0x1fcc/0x6ef0
[ 370.480892] [ T48] ? asm_sysvec_apic_timer_interrupt+0x16/0x20
[ 370.481241] [ T48] ? trace_hardirqs_on+0x14/0x190
[ 370.481575] [ T48] ? __pfx___schedule+0x10/0x10
[ 370.481956] [ T48] ? lock_acquire+0x2f5/0x340
[ 370.482329] [ T48] ? lock_acquire+0x2f5/0x340
[ 370.482679] [ T48] ? rcu_is_watching+0x12/0xb0
[ 370.483565] [ T48] ? lock_release+0x285/0x340
[ 370.483890] [ T48] schedule+0xe3/0x2e0
[ 370.484268] [ T48] ? rwsem_down_read_slowpath+0x31e/0x10d0
[ 370.484619] [ T48] schedule_preempt_disabled+0x14/0x30
[ 370.484939] [ T48] rwsem_down_read_slowpath+0x61a/0x10d0
[ 370.485317] [ T48] ? __pfx_rwsem_down_read_slowpath+0x10/0x10
[ 370.485683] [ T48] ? __pfx___might_resched+0x10/0x10
[ 370.486011] [ T48] down_read+0xfa/0x540
[ 370.486382] [ T48] ? __pfx_down_read+0x10/0x10
[ 370.486738] [ T48] ? filemap_check_errors+0x58/0x100
[ 370.487087] [ T48] blkdev_write_iter+0x928/0xf40
[ 370.487701] [ T48] do_iter_readv_writev+0x48a/0xb80
[ 370.488224] [ T48] ? __pfx_folio_add_lru_vma+0x10/0x10
[ 370.488586] [ T48] ? rcu_read_unlock+0x1c/0x60
[ 370.488912] [ T48] ? __folio_mod_stat+0x4c/0x190
[ 370.489301] [ T48] ? __pfx_do_iter_readv_writev+0x10/0x10
[ 370.489661] [ T48] ? folio_add_new_anon_rmap+0x34f/0xd40
[ 370.490161] [ T48] ? selinux_file_permission+0x3c0/0x530
[ 370.490543] [ T48] ? security_file_permission+0x44/0xc0
[ 370.490874] [ T48] ? rw_verify_area+0x77/0x650
[ 370.491273] [ T48] vfs_writev+0x27d/0xbc0
[ 370.491634] [ T48] ? __pfx_vfs_writev+0x10/0x10
[ 370.491964] [ T48] ? __handle_mm_fault+0x1584/0x1fb0
[ 370.492350] [ T48] ? lock_acquire+0x1b1/0x340
[ 370.492713] [ T48] ? __fget_files+0x1d8/0x440
[ 370.493068] [ T48] ? do_pwritev+0x18a/0x300
[ 370.493440] [ T48] do_pwritev+0x18a/0x300
[ 370.493812] [ T48] ? __pfx_do_pwritev+0x10/0x10
[ 370.494186] [ T48] ? lock_release+0x1b5/0x340
[ 370.494532] [ T48] ? rcu_is_watching+0x12/0xb0
[ 370.494844] [ T48] do_syscall_64+0xf2/0x690
[ 370.495208] [ T48] ? do_syscall_64+0x2d/0x690
[ 370.495547] [ T48] ? trace_hardirqs_off_finish+0x139/0x180
[ 370.495856] [ T48] ? lockdep_hardirqs_off+0xaf/0xf0
[ 370.496326] [ T48] ? do_syscall_64+0x60/0x690
[ 370.496639] [ T48] entry_SYSCALL_64_after_hwframe+0x76/0x7e
[ 370.496933] [ T48] RIP: 0033:0x7f1cae028e32
[ 370.497283] [ T48] RSP: 002b:00007f1cadf98d98 EFLAGS: 00000246 ORIG_RAX: 0000000000000128
[ 370.497644] [ T48] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f1cae028e32
[ 370.497965] [ T48] RDX: 0000000000000002 RSI: 00007f1cadf98e20 RDI: 0000000000000004
[ 370.498308] [ T48] RBP: 00007f1cadf98dc0 R08: 0000000000000000 R09: 0000000000000000
[ 370.498614] [ T48] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f1ca8001000
[ 370.498891] [ T48] R13: 00007fff0eee6560 R14: 0000000000000000 R15: 00007fff0eee6667
[ 370.499233] [ T48] </TASK>
[ 370.499539] [ T48] INFO: task dio-fallback-ra:1088 is blocked on an rw-semaphore, but the owner is not found.
[ 370.499833] [ T48] INFO: task dio-fallback-ra:1089 blocked for more than 245 seconds.
[ 370.500182] [ T48] Not tainted 7.3.0-rc2+ #715
[ 370.500541] [ T48] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 370.500849] [ T48] task:dio-fallback-ra state:D stack:0 pid:1089 tgid:1087 ppid:1042 task_flags:0x400040 flags:0x00080000
[ 370.501230] [ T48] Call Trace:
[ 370.501622] [ T48] <TASK>
[ 370.501970] [ T48] __schedule+0x1fcc/0x6ef0
[ 370.502371] [ T48] ? __pfx_bio_wait_end_io+0x10/0x10
[ 370.502711] [ T48] ? __pfx___schedule+0x10/0x10
[ 370.503052] [ T48] ? lock_acquire+0x2f5/0x340
[ 370.503416] [ T48] ? lock_acquire+0x2f5/0x340
[ 370.503759] [ T48] ? rcu_is_watching+0x12/0xb0
[ 370.504097] [ T48] ? lock_release+0x285/0x340
[ 370.504437] [ T48] schedule+0xe3/0x2e0
[ 370.504776] [ T48] ? rwsem_down_read_slowpath+0x31e/0x10d0
[ 370.505113] [ T48] schedule_preempt_disabled+0x14/0x30
[ 370.505480] [ T48] rwsem_down_read_slowpath+0x61a/0x10d0
[ 370.505841] [ T48] ? __pfx_rwsem_down_read_slowpath+0x10/0x10
[ 370.506224] [ T48] ? blkdev_direct_IO+0x86f/0x1c50
[ 370.506576] [ T48] ? __pfx___might_resched+0x10/0x10
[ 370.506938] [ T48] down_read+0xfa/0x540
[ 370.507302] [ T48] ? __pfx_down_read+0x10/0x10
[ 370.507653] [ T48] ? filemap_check_errors+0x58/0x100
[ 370.508052] [ T48] blkdev_write_iter+0x882/0xf40
[ 370.508582] [ T48] do_iter_readv_writev+0x48a/0xb80
[ 370.509013] [ T48] ? vfs_writev+0x831/0xbc0
[ 370.509401] [ T48] ? __pfx_do_iter_readv_writev+0x10/0x10
[ 370.510181] [ T48] ? selinux_file_permission+0x3c0/0x530
[ 370.510538] [ T48] ? security_file_permission+0x44/0xc0
[ 370.510887] [ T48] ? rw_verify_area+0x77/0x650
[ 370.511266] [ T48] vfs_writev+0x27d/0xbc0
[ 370.511627] [ T48] ? __pfx_vfs_writev+0x10/0x10
[ 370.511948] [ T48] ? __fget_files+0x4f/0x440
[ 370.512325] [ T48] ? __fget_files+0x1d8/0x440
[ 370.512676] [ T48] ? do_pwritev+0x18a/0x300
[ 370.512990] [ T48] do_pwritev+0x18a/0x300
[ 370.513356] [ T48] ? __pfx_do_pwritev+0x10/0x10
[ 370.513701] [ T48] ? lock_release+0x1b5/0x340
[ 370.514036] [ T48] ? rcu_is_watching+0x12/0xb0
[ 370.514376] [ T48] do_syscall_64+0xf2/0x690
[ 370.514724] [ T48] ? rcu_read_unlock+0x17/0x60
[ 370.515060] [ T48] ? lock_release+0x1b5/0x340
[ 370.515392] [ T48] ? __handle_mm_fault+0x1584/0x1fb0
[ 370.515725] [ T48] ? __lock_acquire+0x54a/0x2490
[ 370.516047] [ T48] ? __pfx___css_rstat_updated+0x10/0x10
[ 370.516374] [ T48] ? lock_acquire+0x1b1/0x340
[ 370.516712] [ T48] ? rcu_is_watching+0x12/0xb0
[ 370.517009] [ T48] ? count_memcg_events+0x107/0x4c0
[ 370.517347] [ T48] ? find_held_lock+0x2b/0x80
[ 370.517661] [ T48] ? rcu_read_unlock+0x17/0x60
[ 370.517937] [ T48] ? lock_release+0x1b5/0x340
[ 370.518259] [ T48] ? find_held_lock+0x2b/0x80
[ 370.518555] [ T48] ? exc_page_fault+0x94/0x140
[ 370.518810] [ T48] ? lock_release+0x1b5/0x340
[ 370.519079] [ T48] ? rcu_is_watching+0x12/0xb0
[ 370.519384] [ T48] ? do_syscall_64+0x2d/0x690
[ 370.519662] [ T48] ? trace_hardirqs_off_finish+0x139/0x180
[ 370.519911] [ T48] ? lockdep_hardirqs_off+0xaf/0xf0
[ 370.520212] [ T48] ? do_syscall_64+0x60/0x690
[ 370.520493] [ T48] entry_SYSCALL_64_after_hwframe+0x76/0x7e
[ 370.520750] [ T48] RIP: 0033:0x7f1cae028e32
[ 370.521009] [ T48] RSP: 002b:00007f1cad797d98 EFLAGS: 00000246 ORIG_RAX: 0000000000000128
[ 370.521333] [ T48] RAX: ffffffffffffffda RBX: 0000000000004000 RCX: 00007f1cae028e32
[ 370.521635] [ T48] RDX: 0000000000000002 RSI: 00007f1cad797e20 RDI: 0000000000000005
[ 370.521908] [ T48] RBP: 00007f1cad797dc0 R08: 0000000000000000 R09: 0000000000000000
[ 370.522230] [ T48] R10: 0000000000004000 R11: 0000000000000246 R12: 00007f1c9c001000
[ 370.522540] [ T48] R13: 00007fff0eee6560 R14: 0000000000000000 R15: 00007fff0eee6667
[ 370.522815] [ T48] </TASK>
[ 370.523114] [ T48] INFO: task dio-fallback-ra:1089 is blocked on an rw-semaphore, but the owner is not found.
[ 370.523427] [ T48] INFO: task dio-fallback-ra:1091 blocked for more than 245 seconds.
[ 370.523746] [ T48] Not tainted 7.3.0-rc2+ #715
[ 370.524053] [ T48] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 370.524380] [ T48] task:dio-fallback-ra state:D stack:0 pid:1091 tgid:1087 ppid:1042 task_flags:0x400040 flags:0x00080000
[ 370.524727] [ T48] Call Trace:
[ 370.525060] [ T48] <TASK>
[ 370.525391] [ T48] __schedule+0x1fcc/0x6ef0
[ 370.525728] [ T48] ? blk_stat_add+0xbc/0x450
[ 370.526058] [ T48] ? rcu_is_watching+0x12/0xb0
[ 370.526390] [ T48] ? lock_release+0x285/0x340
[ 370.526725] [ T48] ? percpu_ref_put_many.constprop.0+0x39/0x1d0
[ 370.527058] [ T48] ? __pfx___schedule+0x10/0x10
[ 370.527393] [ T48] ? lock_acquire+0x2f5/0x340
[ 370.527731] [ T48] ? lock_acquire+0x2f5/0x340
[ 370.528063] [ T48] ? rcu_is_watching+0x12/0xb0
[ 370.528396] [ T48] ? lock_release+0x285/0x340
[ 370.528737] [ T48] schedule+0xe3/0x2e0
[ 370.529061] [ T48] ? rwsem_down_read_slowpath+0x31e/0x10d0
[ 370.529483] [ T48] schedule_preempt_disabled+0x14/0x30
[ 370.529840] [ T48] rwsem_down_read_slowpath+0x61a/0x10d0
[ 370.530206] [ T48] ? __pfx_rwsem_down_read_slowpath+0x10/0x10
[ 370.530590] [ T48] ? blk_mq_dispatch_queue_requests+0x51a/0x7e0
[ 370.530905] [ T48] ? blk_mq_dispatch_queue_requests+0x576/0x7e0
[ 370.531290] [ T48] ? __pfx_folio_batch_move_lru+0x10/0x10
[ 370.531649] [ T48] ? __pfx___might_resched+0x10/0x10
[ 370.531992] [ T48] down_read+0xfa/0x540
[ 370.532351] [ T48] ? __pfx_down_read+0x10/0x10
[ 370.532693] [ T48] ? __blk_flush_plug+0x29f/0x540
[ 370.533008] [ T48] ? selinux_file_permission+0x3c0/0x530
[ 370.533367] [ T48] ? security_file_permission+0x44/0xc0
[ 370.533712] [ T48] blkdev_read_iter+0x15a/0x4e0
[ 370.534047] [ T48] ? rw_verify_area+0x77/0x650
[ 370.534389] [ T48] vfs_read+0x6f4/0xb30
[ 370.534704] [ T48] ? blk_finish_plug+0x52/0xc0
[ 370.535042] [ T48] ? __pfx_vfs_read+0x10/0x10
[ 370.535417] [ T48] ? lock_release+0x285/0x340
[ 370.535765] [ T48] __x64_sys_pread64+0x18d/0x250
[ 370.536104] [ T48] ? __pfx___x64_sys_pread64+0x10/0x10
[ 370.536520] [ T48] ? rcu_is_watching+0x12/0xb0
[ 370.536857] [ T48] ? rcu_is_watching+0x12/0xb0
[ 370.537224] [ T48] ? do_syscall_64+0x7f/0x690
[ 370.537532] [ T48] do_syscall_64+0xf2/0x690
[ 370.537834] [ T48] ? force_page_cache_ra+0x21c/0x370
[ 370.538191] [ T48] ? generic_fadvise+0x35c/0x660
[ 370.538522] [ T48] ? __pfx_generic_fadvise+0x10/0x10
[ 370.538817] [ T48] ? rcu_is_watching+0x12/0xb0
[ 370.539139] [ T48] ? lock_release+0x285/0x340
[ 370.539459] [ T48] ? __fget_files+0x1d8/0x440
[ 370.539778] [ T48] ? fput+0x1b/0xa0
[ 370.540079] [ T48] ? fput+0x48/0xa0
[ 370.540375] [ T48] ? rcu_is_watching+0x12/0xb0
[ 370.540671] [ T48] ? do_syscall_64+0x1ff/0x690
[ 370.540931] [ T48] ? trace_hardirqs_on_prepare+0x139/0x180
[ 370.541234] [ T48] ? do_syscall_64+0x21d/0x690
[ 370.541509] [ T48] ? vfs_read+0x3b6/0xb30
[ 370.541753] [ T48] ? vfs_read+0x3b6/0xb30
[ 370.541994] [ T48] ? lock_acquire+0x1b1/0x340
[ 370.542289] [ T48] ? __pfx_vfs_read+0x10/0x10
[ 370.542564] [ T48] ? __fget_files+0x1ce/0x440
[ 370.542806] [ T48] ? lock_release+0x1b5/0x340
[ 370.543070] [ T48] ? fput+0x1b/0xa0
[ 370.543333] [ T48] ? fput+0x48/0xa0
[ 370.543607] [ T48] ? __x64_sys_pread64+0x1ad/0x250
[ 370.543878] [ T48] ? __pfx___x64_sys_pread64+0x10/0x10
[ 370.544144] [ T48] ? rcu_is_watching+0x12/0xb0
[ 370.544442] [ T48] ? do_syscall_64+0x1ff/0x690
[ 370.544681] [ T48] ? trace_hardirqs_on_prepare+0x139/0x180
[ 370.544922] [ T48] ? do_syscall_64+0x21d/0x690
[ 370.545210] [ T48] ? rcu_is_watching+0x12/0xb0
[ 370.545480] [ T48] ? do_syscall_64+0x2d/0x690
[ 370.545714] [ T48] ? trace_hardirqs_off_finish+0x139/0x180
[ 370.545949] [ T48] ? lockdep_hardirqs_off+0xaf/0xf0
[ 370.546249] [ T48] ? do_syscall_64+0x60/0x690
[ 370.546517] [ T48] entry_SYSCALL_64_after_hwframe+0x76/0x7e
[ 370.546757] [ T48] RIP: 0033:0x7f1cae028e32
[ 370.546995] [ T48] RSP: 002b:00007f1ca45fedc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000011
[ 370.547300] [ T48] RAX: ffffffffffffffda RBX: 0000000000002000 RCX: 00007f1cae028e32
[ 370.547627] [ T48] RDX: 0000000000002000 RSI: 00007f1c94000880 RDI: 0000000000000006
[ 370.547912] [ T48] RBP: 00007f1ca45fedf0 R08: 0000000000000000 R09: 0000000000000000
[ 370.548218] [ T48] R10: 0000000000002000 R11: 0000000000000246 R12: 00007f1c94000880
[ 370.548506] [ T48] R13: 00007fff0eee6540 R14: 0000000000000000 R15: 00007fff0eee6647
[ 370.548766] [ T48] </TASK>
[ 370.549041] [ T48] INFO: task dio-fallback-ra:1091 is blocked on an rw-semaphore, but the owner is not found.
[ 370.549342] [ T48] INFO: task dio-fallback-ra:1092 blocked for more than 245 seconds.
[ 370.549635] [ T48] Not tainted 7.3.0-rc2+ #715
[ 370.549985] [ T48] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 370.550319] [ T48] task:dio-fallback-ra state:D stack:0 pid:1092 tgid:1087 ppid:1042 task_flags:0x400140 flags:0x00080000
[ 370.550642] [ T48] Call Trace:
[ 370.550994] [ T48] <TASK>
[ 370.551339] [ T48] __schedule+0x1fcc/0x6ef0
[ 370.551672] [ T48] ? rcu_is_watching+0x12/0xb0
[ 370.552022] [ T48] ? __pfx___schedule+0x10/0x10
[ 370.552349] [ T48] ? lock_acquire+0x2f5/0x340
[ 370.552708] [ T48] ? lock_acquire+0x2f5/0x340
[ 370.553001] [ T48] ? rcu_is_watching+0x12/0xb0
[ 370.553342] [ T48] ? lock_release+0x285/0x340
[ 370.553667] [ T48] schedule+0xe3/0x2e0
[ 370.553961] [ T48] ? _raw_spin_unlock_irq+0x34/0x50
[ 370.554330] [ T48] schedule_preempt_disabled+0x14/0x30
[ 370.554645] [ T48] rwsem_down_write_slowpath+0x4b3/0x1830
[ 370.554949] [ T48] ? __pfx_rwsem_down_write_slowpath+0x10/0x10
[ 370.555308] [ T48] ? rcu_is_watching+0x12/0xb0
[ 370.555643] [ T48] ? lock_release+0x285/0x340
[ 370.555943] [ T48] ? __pfx___mutex_lock+0x10/0x10
[ 370.556300] [ T48] ? __pfx___might_resched+0x10/0x10
[ 370.556639] [ T48] down_write+0x1be/0x1f0
[ 370.556974] [ T48] ? __pfx_down_write+0x10/0x10
[ 370.557328] [ T48] ? bdev_open+0x90c/0xc60
[ 370.557667] [ T48] set_blocksize+0x1ad/0x460
[ 370.557975] [ T48] ? bdev_file_open_by_dev+0xe6/0x170
[ 370.558335] [ T48] blkdev_bszset+0x142/0x1e0
[ 370.558678] [ T48] ? __pfx_blkdev_bszset+0x10/0x10
[ 370.558991] [ T48] ? lock_acquire+0x2f5/0x340
[ 370.559374] [ T48] ? rcu_is_watching+0x12/0xb0
[ 370.559701] [ T48] blkdev_ioctl+0x4e9/0x5e0
[ 370.560016] [ T48] ? __pfx_blkdev_ioctl+0x10/0x10
[ 370.560411] [ T48] __x64_sys_ioctl+0x138/0x1c0
[ 370.560754] [ T48] do_syscall_64+0xf2/0x690
[ 370.561086] [ T48] ? rcu_read_unlock+0x1c/0x60
[ 370.561424] [ T48] ? handle_mm_fault+0x35f/0x660
[ 370.561767] [ T48] ? rcu_is_watching+0x12/0xb0
[ 370.562100] [ T48] ? lock_release+0x285/0x340
[ 370.562451] [ T48] ? rcu_is_watching+0x12/0xb0
[ 370.562806] [ T48] ? do_user_addr_fault+0x52e/0xaf0
[ 370.563149] [ T48] ? rcu_is_watching+0x12/0xb0
[ 370.563471] [ T48] ? do_syscall_64+0x2d/0x690
[ 370.563765] [ T48] ? trace_hardirqs_off_finish+0x139/0x180
[ 370.564087] [ T48] ? trace_hardirqs_off+0x14f/0x1a0
[ 370.564406] [ T48] ? do_syscall_64+0x60/0x690
[ 370.564729] [ T48] entry_SYSCALL_64_after_hwframe+0x76/0x7e
[ 370.565044] [ T48] RIP: 0033:0x7f1cae0a073d
[ 370.565358] [ T48] RSP: 002b:00007f1ca7ffedd0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[ 370.565679] [ T48] RAX: ffffffffffffffda RBX: 0000000000000200 RCX: 00007f1cae0a073d
[ 370.565968] [ T48] RDX: 00007f1ca7ffee3c RSI: 0000000040081271 RDI: 0000000000000003
[ 370.566311] [ T48] RBP: 00007f1ca7ffee20 R08: 0000000000000000 R09: 00007f1ca7fff6c0
[ 370.566623] [ T48] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000021
[ 370.566897] [ T48] R13: 00007fff0eee6540 R14: 0000000000000000 R15: 00007fff0eee6647
[ 370.567218] [ T48] </TASK>
[ 370.567514] [ T48] INFO: task dio-fallback-ra:1092 is blocked on an rw-semaphore, but the owner is not found.
[ 370.567808] [ T48] INFO: lockdep is turned off.
next prev parent reply other threads:[~2026-10-27 4:26 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-15 9:11 [PATCH 0/2] block: fix NOWAIT handling and locking in buffered write fallback Julian Sun
2026-10-15 9:11 ` [PATCH 1/2] block: reject NOWAIT " Julian Sun
2026-10-15 9:11 ` [PATCH 2/2] block: take the inode lock for " Julian Sun
2026-10-27 4:24 ` Shin'ichiro Kawasaki [this message]
2026-10-27 6:13 ` Julian Sun
2026-10-27 7:29 ` Shin'ichiro Kawasaki
2026-10-15 12:41 ` [PATCH 0/2] block: fix NOWAIT handling and locking in " Jens Axboe
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=auAmMShKl4S2lc1u@shinmob \
--to=shinichiro.kawasaki@wdc.com \
--cc=axboe@kernel.dk \
--cc=djwong@kernel.org \
--cc=jack@suse.cz \
--cc=linux-block@vger.kernel.org \
--cc=mcgrof@kernel.org \
--cc=sunjunchao@bytedance.com \
--cc=tz2294@columbia.edu \
--cc=viro@zeniv.linux.org.uk \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.