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Date: Wed, 16 Feb 2022 13:15:16 +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,
sj@...nel.org, jglisse@...hat.com, dennis@...nel.org, cl@...ux.com,
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_sync_file()
[ 7.072624] ===================================================
[ 7.072630] DEPT: Circular dependency has been detected.
[ 7.072631] 5.17.0-rc1-00014-gcf3441bb2012 #2 Tainted: G W
[ 7.072635] ---------------------------------------------------
[ 7.072636] summary
[ 7.072636] ---------------------------------------------------
[ 7.072637] *** DEADLOCK ***
[ 7.072637]
[ 7.072638] context A
[ 7.072640] [S] (unknown)(&(&journal->j_wait_commit)->dmap:0)
[ 7.072643] [W] folio_wait_bit_common(pgwriteback:0)
[ 7.072644] [E] event(&(&journal->j_wait_commit)->dmap:0)
[ 7.072646]
[ 7.072647] context B
[ 7.072647] [S] __raw_write_lock(&journal->j_state_lock:8)
[ 7.072649] [W] wait(&(&journal->j_wait_commit)->dmap:0)
[ 7.072654] [E] write_unlock(&journal->j_state_lock:8)
[ 7.072656]
[ 7.072657] context C
[ 7.072658] [S] (unknown)(pgwriteback:0)
[ 7.072659] [W] __raw_read_lock(&journal->j_state_lock:8)
[ 7.072661] [E] folio_wake_bit(pgwriteback:0)
[ 7.072663]
[ 7.072663] [S]: start of the event context
[ 7.072664] [W]: the wait blocked
[ 7.072665] [E]: the event not reachable
[ 7.072666] ---------------------------------------------------
[ 7.072667] context A's detail
[ 7.072668] ---------------------------------------------------
[ 7.072669] context A
[ 7.072670] [S] (unknown)(&(&journal->j_wait_commit)->dmap:0)
[ 7.072672] [W] folio_wait_bit_common(pgwriteback:0)
[ 7.072674] [E] event(&(&journal->j_wait_commit)->dmap:0)
[ 7.072675]
[ 7.072676] [S] (unknown)(&(&journal->j_wait_commit)->dmap:0):
[ 7.072678] (N/A)
[ 7.072679]
[ 7.072680] [W] folio_wait_bit_common(pgwriteback:0):
[ 7.072681] [<ffffffff811ae2e2>] folio_wait_writeback+0x52/0xb0
[ 7.072688] stacktrace:
[ 7.072689] folio_wait_bit+0x1ea/0x2a0
[ 7.072692] folio_wait_writeback+0x52/0xb0
[ 7.072695] __filemap_fdatawait_range+0x6d/0xc0
[ 7.072701] file_write_and_wait_range+0x90/0xc0
[ 7.072703] ext4_sync_file+0x1b5/0x410
[ 7.072708] do_fsync+0x33/0x60
[ 7.072712] __x64_sys_fsync+0xb/0x10
[ 7.072715] do_syscall_64+0x3a/0x90
[ 7.072719] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 7.072723]
[ 7.072724] [E] event(&(&journal->j_wait_commit)->dmap:0):
[ 7.072725] [<ffffffff810baa53>] __wake_up_common+0x93/0x1a0
[ 7.072728] stacktrace:
[ 7.072729] dept_event+0x12b/0x1f0
[ 7.072733] __wake_up_common+0xb0/0x1a0
[ 7.072735] __wake_up_common_lock+0x65/0x90
[ 7.072737] __jbd2_log_start_commit+0x8a/0xa0
[ 7.072740] jbd2_log_start_commit+0x24/0x40
[ 7.072742] jbd2_complete_transaction+0x79/0x90
[ 7.072745] ext4_fc_commit+0x329/0x940
[ 7.072748] ext4_sync_file+0x29f/0x410
[ 7.072751] do_fsync+0x33/0x60
[ 7.072754] __x64_sys_fsync+0xb/0x10
[ 7.072757] do_syscall_64+0x3a/0x90
[ 7.072759] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 7.072762] ---------------------------------------------------
[ 7.072763] context B's detail
[ 7.072764] ---------------------------------------------------
[ 7.072765] context B
[ 7.072766] [S] __raw_write_lock(&journal->j_state_lock:8)
[ 7.072768] [W] wait(&(&journal->j_wait_commit)->dmap:0)
[ 7.072769] [E] write_unlock(&journal->j_state_lock:8)
[ 7.072771]
[ 7.072772] [S] __raw_write_lock(&journal->j_state_lock:8):
[ 7.072773] [<ffffffff81346e9e>] kjournald2+0x7e/0x260
[ 7.072776] stacktrace:
[ 7.072777] _raw_write_lock+0x6e/0x90
[ 7.072779] kjournald2+0x7e/0x260
[ 7.072781] kthread+0xe3/0x110
[ 7.072785] ret_from_fork+0x22/0x30
[ 7.072789]
[ 7.072789] [W] wait(&(&journal->j_wait_commit)->dmap:0):
[ 7.072791] [<ffffffff810bb017>] prepare_to_wait+0x47/0xd0
[ 7.072794] stacktrace:
[ 7.072795] kjournald2+0x164/0x260
[ 7.072797] kthread+0xe3/0x110
[ 7.072800] ret_from_fork+0x22/0x30
[ 7.072802]
[ 7.072802] [E] write_unlock(&journal->j_state_lock:8):
[ 7.072804] [<ffffffff8134700b>] kjournald2+0x1eb/0x260
[ 7.072806] stacktrace:
[ 7.072807] _raw_write_unlock+0x30/0x70
[ 7.072810] kjournald2+0x1eb/0x260
[ 7.072812] kthread+0xe3/0x110
[ 7.072814] ret_from_fork+0x22/0x30
[ 7.072816] ---------------------------------------------------
[ 7.072817] context C's detail
[ 7.072818] ---------------------------------------------------
[ 7.072819] context C
[ 7.072820] [S] (unknown)(pgwriteback:0)
[ 7.072822] [W] __raw_read_lock(&journal->j_state_lock:8)
[ 7.072823] [E] folio_wake_bit(pgwriteback:0)
[ 7.072825]
[ 7.072825] [S] (unknown)(pgwriteback:0):
[ 7.072827] (N/A)
[ 7.072828]
[ 7.072828] [W] __raw_read_lock(&journal->j_state_lock:8):
[ 7.072830] [<ffffffff8133cd87>] start_this_handle+0xa7/0x5e0
[ 7.072834] stacktrace:
[ 7.072834] _raw_read_lock+0x57/0xd0
[ 7.072837] start_this_handle+0xa7/0x5e0
[ 7.072839] jbd2_journal_start_reserved+0x4d/0x170
[ 7.072842] __ext4_journal_start_reserved+0x87/0x160
[ 7.072845] ext4_convert_unwritten_io_end_vec+0x26/0xb0
[ 7.072848] ext4_end_io_rsv_work+0xef/0x140
[ 7.072850] process_one_work+0x317/0x640
[ 7.072852] worker_thread+0x44/0x410
[ 7.072854] kthread+0xe3/0x110
[ 7.072857] ret_from_fork+0x22/0x30
[ 7.072859]
[ 7.072860] [E] folio_wake_bit(pgwriteback:0):
[ 7.072862] [<ffffffff811a30f2>] folio_end_writeback+0x32/0x80
[ 7.072865] stacktrace:
[ 7.072866] folio_wake_bit+0x15e/0x170
[ 7.072868] folio_end_writeback+0x32/0x80
[ 7.072870] ext4_finish_bio+0x15a/0x200
[ 7.072872] ext4_release_io_end+0x41/0xe0
[ 7.072874] ext4_end_io_rsv_work+0xaf/0x140
[ 7.072876] process_one_work+0x317/0x640
[ 7.072878] worker_thread+0x44/0x410
[ 7.072880] kthread+0xe3/0x110
[ 7.072883] ret_from_fork+0x22/0x30
[ 7.072885] ---------------------------------------------------
[ 7.072886] information that might be helpful
[ 7.072887] ---------------------------------------------------
[ 7.072889] CPU: 1 PID: 620 Comm: cupsd Tainted: G W 5.17.0-rc1-00014-gcf3441bb2012 #2
[ 7.072893] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
[ 7.072894] Call Trace:
[ 7.072896] <TASK>
[ 7.072898] dump_stack_lvl+0x44/0x57
[ 7.072902] print_circle+0x384/0x510
[ 7.072905] ? print_circle+0x510/0x510
[ 7.072908] cb_check_dl+0x58/0x60
[ 7.072936] bfs+0xdc/0x1b0
[ 7.072940] add_dep+0x94/0x120
[ 7.072944] do_event.isra.22+0x284/0x300
[ 7.072947] ? __wake_up_common+0x93/0x1a0
[ 7.072949] dept_event+0x12b/0x1f0
[ 7.072953] __wake_up_common+0xb0/0x1a0
[ 7.072956] __wake_up_common_lock+0x65/0x90
[ 7.072960] __jbd2_log_start_commit+0x8a/0xa0
[ 7.072963] jbd2_log_start_commit+0x24/0x40
[ 7.072966] jbd2_complete_transaction+0x79/0x90
[ 7.072969] ext4_fc_commit+0x329/0x940
[ 7.072972] ? to_pool+0x6d/0xb0
[ 7.072975] ? pop_ecxt+0x104/0x110
[ 7.072982] ? dept_ecxt_exit+0xc0/0x140
[ 7.072986] ? _raw_read_unlock+0x4f/0x70
[ 7.072989] ext4_sync_file+0x29f/0x410
[ 7.072994] do_fsync+0x33/0x60
[ 7.072997] __x64_sys_fsync+0xb/0x10
[ 7.073000] do_syscall_64+0x3a/0x90
[ 7.073003] entry_SYSCALL_64_after_hwframe+0x44/0xae
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