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Date: Wed, 16 Feb 2022 13:15:13 +0900
From: Byungchul Park <byungchul.park@....com>
To: tytso@....edu, adilger.kernel@...ger.ca, linux-ext4@...r.kernel.org
Cc: torvalds@...ux-foundation.org, mingo@...hat.com,
linux-kernel@...r.kernel.org, peterz@...radead.org,
will@...nel.org, tglx@...utronix.de, rostedt@...dmis.org,
joel@...lfernandes.org, sashal@...nel.org, daniel.vetter@...ll.ch,
chris@...is-wilson.co.uk, duyuyang@...il.com,
johannes.berg@...el.com, tj@...nel.org, willy@...radead.org,
david@...morbit.com, amir73il@...il.com, bfields@...ldses.org,
gregkh@...uxfoundation.org, kernel-team@....com,
linux-mm@...ck.org, akpm@...ux-foundation.org, mhocko@...nel.org,
minchan@...nel.org, hannes@...xchg.org, vdavydov.dev@...il.com,
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penberg@...nel.org, rientjes@...gle.com, vbabka@...e.cz,
ngupta@...are.org, linux-block@...r.kernel.org, axboe@...nel.dk,
paolo.valente@...aro.org, josef@...icpanda.com,
linux-fsdevel@...r.kernel.org, viro@...iv.linux.org.uk,
jack@...e.cz, jlayton@...nel.org, dan.j.williams@...el.com,
hch@...radead.org, djwong@...nel.org,
dri-devel@...ts.freedesktop.org, airlied@...ux.ie,
rodrigosiqueiramelo@...il.com, melissa.srw@...il.com,
hamohammed.sa@...il.com
Subject: Report in ext4_buffered_write_iter()
[ 7.083356] ===================================================
[ 7.083360] DEPT: Circular dependency has been detected.
[ 7.083361] 5.17.0-rc1-00014-gcf3441bb2012 #2 Tainted: G W
[ 7.083363] ---------------------------------------------------
[ 7.083364] summary
[ 7.083364] ---------------------------------------------------
[ 7.083365] *** DEADLOCK ***
[ 7.083365]
[ 7.083366] context A
[ 7.083366] [S] (unknown)(&(&journal->j_wait_commit)->dmap:0)
[ 7.083368] [W] down_write(&sb->s_type->i_mutex_key:0)
[ 7.083370] [E] event(&(&journal->j_wait_commit)->dmap:0)
[ 7.083371]
[ 7.083371] context B
[ 7.083372] [S] __raw_write_lock(&journal->j_state_lock:8)
[ 7.083373] [W] wait(&(&journal->j_wait_commit)->dmap:0)
[ 7.083374] [E] write_unlock(&journal->j_state_lock:8)
[ 7.083375]
[ 7.083376] context C
[ 7.083377] [S] down_write(&sb->s_type->i_mutex_key:0)
[ 7.083378] [W] __raw_read_lock(&journal->j_state_lock:8)
[ 7.083379] [E] up_write(&sb->s_type->i_mutex_key:0)
[ 7.083380]
[ 7.083380] [S]: start of the event context
[ 7.083381] [W]: the wait blocked
[ 7.083382] [E]: the event not reachable
[ 7.083382] ---------------------------------------------------
[ 7.083383] context A's detail
[ 7.083384] ---------------------------------------------------
[ 7.083384] context A
[ 7.083385] [S] (unknown)(&(&journal->j_wait_commit)->dmap:0)
[ 7.083386] [W] down_write(&sb->s_type->i_mutex_key:0)
[ 7.083387] [E] event(&(&journal->j_wait_commit)->dmap:0)
[ 7.083388]
[ 7.083388] [S] (unknown)(&(&journal->j_wait_commit)->dmap:0):
[ 7.083389] (N/A)
[ 7.083390]
[ 7.083391] [W] down_write(&sb->s_type->i_mutex_key:0):
[ 7.083391] [<ffffffff812e39d7>] ext4_buffered_write_iter+0x37/0x100
[ 7.083398] stacktrace:
[ 7.083399] down_write+0x68/0x580
[ 7.083402] ext4_buffered_write_iter+0x37/0x100
[ 7.083404] ext4_file_write_iter+0x4a/0x7f0
[ 7.083406] new_sync_write+0x100/0x190
[ 7.083409] vfs_write+0x134/0x360
[ 7.083411] ksys_write+0x4d/0xc0
[ 7.083413] do_syscall_64+0x3a/0x90
[ 7.083415] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 7.083417]
[ 7.083418] [E] event(&(&journal->j_wait_commit)->dmap:0):
[ 7.083419] [<ffffffff810baa53>] __wake_up_common+0x93/0x1a0
[ 7.083421] stacktrace:
[ 7.083422] dept_event+0x12b/0x1f0
[ 7.083424] __wake_up_common+0xb0/0x1a0
[ 7.083426] __wake_up_common_lock+0x65/0x90
[ 7.083427] __jbd2_log_start_commit+0x8a/0xa0
[ 7.083430] jbd2_log_start_commit+0x24/0x40
[ 7.083431] __jbd2_journal_force_commit+0x91/0xb0
[ 7.083433] jbd2_journal_force_commit_nested+0x5/0x10
[ 7.083434] ext4_should_retry_alloc+0x5b/0xb0
[ 7.083436] ext4_da_write_begin+0xf2/0x2a0
[ 7.083439] generic_perform_write+0xa6/0x1c0
[ 7.083440] ext4_buffered_write_iter+0x89/0x100
[ 7.083442] ext4_file_write_iter+0x4a/0x7f0
[ 7.083444] new_sync_write+0x100/0x190
[ 7.083446] vfs_write+0x134/0x360
[ 7.083448] ksys_write+0x4d/0xc0
[ 7.083449] do_syscall_64+0x3a/0x90
[ 7.083451] ---------------------------------------------------
[ 7.083452] context B's detail
[ 7.083452] ---------------------------------------------------
[ 7.083453] context B
[ 7.083453] [S] __raw_write_lock(&journal->j_state_lock:8)
[ 7.083454] [W] wait(&(&journal->j_wait_commit)->dmap:0)
[ 7.083455] [E] write_unlock(&journal->j_state_lock:8)
[ 7.083457]
[ 7.083457] [S] __raw_write_lock(&journal->j_state_lock:8):
[ 7.083458] [<ffffffff81346e9e>] kjournald2+0x7e/0x260
[ 7.083460] stacktrace:
[ 7.083460] _raw_write_lock+0x6e/0x90
[ 7.083462] kjournald2+0x7e/0x260
[ 7.083463] kthread+0xe3/0x110
[ 7.083466] ret_from_fork+0x22/0x30
[ 7.083469]
[ 7.083469] [W] wait(&(&journal->j_wait_commit)->dmap:0):
[ 7.083470] [<ffffffff810bb017>] prepare_to_wait+0x47/0xd0
[ 7.083472] stacktrace:
[ 7.083473] kjournald2+0x164/0x260
[ 7.083474] kthread+0xe3/0x110
[ 7.083476] ret_from_fork+0x22/0x30
[ 7.083477]
[ 7.083478] [E] write_unlock(&journal->j_state_lock:8):
[ 7.083479] [<ffffffff8134700b>] kjournald2+0x1eb/0x260
[ 7.083480] stacktrace:
[ 7.083481] _raw_write_unlock+0x30/0x70
[ 7.083483] kjournald2+0x1eb/0x260
[ 7.083484] kthread+0xe3/0x110
[ 7.083486] ret_from_fork+0x22/0x30
[ 7.083487] ---------------------------------------------------
[ 7.083488] context C's detail
[ 7.083488] ---------------------------------------------------
[ 7.083489] context C
[ 7.083490] [S] down_write(&sb->s_type->i_mutex_key:0)
[ 7.083491] [W] __raw_read_lock(&journal->j_state_lock:8)
[ 7.083492] [E] up_write(&sb->s_type->i_mutex_key:0)
[ 7.083493]
[ 7.083493] [S] down_write(&sb->s_type->i_mutex_key:0):
[ 7.083494] [<ffffffff81228358>] do_truncate+0x58/0xa0
[ 7.083496] stacktrace:
[ 7.083497] down_write+0x8a/0x580
[ 7.083498] do_truncate+0x58/0xa0
[ 7.083500] path_openat+0x646/0x9c0
[ 7.083502] do_filp_open+0xaf/0x110
[ 7.083504] do_sys_openat2+0x1ff/0x300
[ 7.083505] do_sys_open+0x51/0x60
[ 7.083507] do_syscall_64+0x3a/0x90
[ 7.083509] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 7.083511]
[ 7.083511] [W] __raw_read_lock(&journal->j_state_lock:8):
[ 7.083512] [<ffffffff8133cd87>] start_this_handle+0xa7/0x5e0
[ 7.083515] stacktrace:
[ 7.083516] _raw_read_lock+0x57/0xd0
[ 7.083518] start_this_handle+0xa7/0x5e0
[ 7.083519] jbd2__journal_start+0xe6/0x220
[ 7.083521] __ext4_journal_start_sb+0x11c/0x150
[ 7.083523] ext4_setattr+0x436/0x8f0
[ 7.083524] notify_change+0x352/0x4c0
[ 7.083527] do_truncate+0x6a/0xa0
[ 7.083528] path_openat+0x646/0x9c0
[ 7.083530] do_filp_open+0xaf/0x110
[ 7.083531] do_sys_openat2+0x1ff/0x300
[ 7.083533] do_sys_open+0x51/0x60
[ 7.083535] do_syscall_64+0x3a/0x90
[ 7.083536] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 7.083538]
[ 7.083539] [E] up_write(&sb->s_type->i_mutex_key:0):
[ 7.083540] [<ffffffff81228381>] do_truncate+0x81/0xa0
[ 7.083541] stacktrace:
[ 7.083542] up_write+0x36/0x170
[ 7.083545] do_truncate+0x81/0xa0
[ 7.083547] path_openat+0x646/0x9c0
[ 7.083548] do_filp_open+0xaf/0x110
[ 7.083550] do_sys_openat2+0x1ff/0x300
[ 7.083552] do_sys_open+0x51/0x60
[ 7.083553] do_syscall_64+0x3a/0x90
[ 7.083555] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 7.083557] ---------------------------------------------------
[ 7.083557] information that might be helpful
[ 7.083558] ---------------------------------------------------
[ 7.083559] CPU: 2 PID: 628 Comm: rs:main Q:Reg Tainted: G W 5.17.0-rc1-00014-gcf3441bb2012 #2
[ 7.083561] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
[ 7.083563] Call Trace:
[ 7.083564] <TASK>
[ 7.083565] dump_stack_lvl+0x44/0x57
[ 7.083568] print_circle+0x384/0x510
[ 7.083570] ? __kernel_text_address+0x9/0x30
[ 7.083572] ? print_circle+0x510/0x510
[ 7.083574] cb_check_dl+0x58/0x60
[ 7.083575] bfs+0xdc/0x1b0
[ 7.083578] add_dep+0x94/0x120
[ 7.083580] do_event.isra.22+0x284/0x300
[ 7.083582] ? __wake_up_common+0x93/0x1a0
[ 7.083583] dept_event+0x12b/0x1f0
[ 7.083586] __wake_up_common+0xb0/0x1a0
[ 7.083588] __wake_up_common_lock+0x65/0x90
[ 7.083590] __jbd2_log_start_commit+0x8a/0xa0
[ 7.083591] jbd2_log_start_commit+0x24/0x40
[ 7.083593] __jbd2_journal_force_commit+0x91/0xb0
[ 7.083595] jbd2_journal_force_commit_nested+0x5/0x10
[ 7.083597] ext4_should_retry_alloc+0x5b/0xb0
[ 7.083598] ext4_da_write_begin+0xf2/0x2a0
[ 7.083601] generic_perform_write+0xa6/0x1c0
[ 7.083604] ext4_buffered_write_iter+0x89/0x100
[ 7.083606] ext4_file_write_iter+0x4a/0x7f0
[ 7.083609] new_sync_write+0x100/0x190
[ 7.083612] vfs_write+0x134/0x360
[ 7.083615] ksys_write+0x4d/0xc0
[ 7.083616] ? trace_hardirqs_on+0x38/0xe0
[ 7.083619] do_syscall_64+0x3a/0x90
[ 7.083621] entry_SYSCALL_64_after_hwframe+0x44/0xae
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