Raw oops dump:
[ 173.695170] ======================================================
[ 173.695175] WARNING: possible circular locking dependency detected
[ 173.695181] 4.14.0-0.rc2.git3.1.fc28.x86_64 #1 Tainted: G OE
[ 173.695186] ------------------------------------------------------
[ 173.695190] mysqld/1282 is trying to acquire lock:
[ 173.695195] (&mm->mmap_sem){++++}, at: [<ffffffff9426941e>]
get_user_pages_unlocked+0x5e/0x1b0
[ 173.695217]
[ 173.695222] (&ei->dio_sem){++++}, at: [<ffffffffc0320bcf>]
btrfs_direct_IO+0x39f/0x400 [btrfs]
[ 173.695293]
[ 173.695299]
[ 173.695304]
[ 173.695322] __lock_acquire+0x1107/0x11d0
[ 173.695330] lock_acquire+0xa3/0x1f0
[ 173.695338] down_write+0x51/0xc0
[ 173.695397] btrfs_log_changed_extents+0x89/0x640 [btrfs]
[ 173.695449] btrfs_log_inode+0x9c1/0x11d0 [btrfs]
[ 173.695495] btrfs_log_inode_parent+0x2df/0xad0 [btrfs]
[ 173.695540] btrfs_log_dentry_safe+0x60/0x80 [btrfs]
[ 173.695588] btrfs_sync_file+0x344/0x4f0 [btrfs]
[ 173.695598] vfs_fsync_range+0x4b/0xb0
[ 173.695605] do_fsync+0x3d/0x70
[ 173.695612] SyS_fsync+0x10/0x20
[ 173.695621] do_syscall_64+0x6c/0x1f0
[ 173.695629] return_from_SYSCALL_64+0x0/0x7a
[ 173.695632]
[ 173.695648] __lock_acquire+0x1107/0x11d0
[ 173.695656] lock_acquire+0xa3/0x1f0
[ 173.695662] __mutex_lock+0x7f/0xa40
[ 173.695669] mutex_lock_nested+0x1b/0x20
[ 173.695713] btrfs_log_inode+0x159/0x11d0 [btrfs]
[ 173.695755] btrfs_log_inode_parent+0x2df/0xad0 [btrfs]
[ 173.695797] btrfs_log_dentry_safe+0x60/0x80 [btrfs]
[ 173.695842] btrfs_sync_file+0x344/0x4f0 [btrfs]
[ 173.695850] vfs_fsync_range+0x4b/0xb0
[ 173.695857] do_fsync+0x3d/0x70
[ 173.695864] SyS_fsync+0x10/0x20
[ 173.695870] do_syscall_64+0x6c/0x1f0
[ 173.695878] return_from_SYSCALL_64+0x0/0x7a
[ 173.695882]
[ 173.695898] __sb_start_write+0x12b/0x1a0
[ 173.695943] start_transaction+0x368/0x4d0 [btrfs]
[ 173.695985] btrfs_join_transaction+0x1d/0x20 [btrfs]
[ 173.696027] delayed_ref_async_start+0x67/0xd0 [btrfs]
[ 173.696074] btrfs_worker_helper+0x93/0x610 [btrfs]
[ 173.696078]
[ 173.696094] __lock_acquire+0x1107/0x11d0
[ 173.696102] lock_acquire+0xa3/0x1f0
[ 173.696108] wait_for_completion+0x62/0x1d0
[ 173.696147] btrfs_async_run_delayed_refs+0x163/0x180 [btrfs]
[ 173.696190] __btrfs_end_transaction+0x1f2/0x2e0 [btrfs]
[ 173.696229] btrfs_end_transaction+0x10/0x20 [btrfs]
[ 173.696271] btrfs_dirty_inode+0x71/0xd0 [btrfs]
[ 173.696310] btrfs_update_time+0x81/0xc0 [btrfs]
[ 173.696319] file_update_time+0xce/0x110
[ 173.696362] btrfs_page_mkwrite+0xf8/0x530 [btrfs]
[ 173.696369] do_page_mkwrite+0x2f/0xd0
[ 173.696375] do_wp_page+0x23e/0x6e0
[ 173.696382] __handle_mm_fault+0xb23/0x1310
[ 173.696389] handle_mm_fault+0x14d/0x310
[ 173.696395] __do_page_fault+0x26e/0x510
[ 173.696401] do_page_fault+0x38/0x280
[ 173.696406] page_fault+0x22/0x30
[ 173.696409]
[ 173.696425] __lock_acquire+0x1107/0x11d0
[ 173.696432] lock_acquire+0xa3/0x1f0
[ 173.696440] __sb_start_write+0x12b/0x1a0
[ 173.696481] btrfs_page_mkwrite+0x68/0x530 [btrfs]
[ 173.696487] do_page_mkwrite+0x2f/0xd0
[ 173.696494] do_wp_page+0x23e/0x6e0
[ 173.696501] __handle_mm_fault+0xb23/0x1310
[ 173.696507] handle_mm_fault+0x14d/0x310
[ 173.696513] __do_page_fault+0x26e/0x510
[ 173.696518] do_page_fault+0x38/0x280
[ 173.696523] page_fault+0x22/0x30
[ 173.696526]
[ 173.696541] check_prev_add+0x351/0x700
[ 173.696548] __lock_acquire+0x1107/0x11d0
[ 173.696556] lock_acquire+0xa3/0x1f0
[ 173.696562] down_read+0x48/0xb0
[ 173.696568] get_user_pages_unlocked+0x5e/0x1b0
[ 173.696575] get_user_pages_fast+0x7a/0xc0
[ 173.696583] iov_iter_get_pages+0xc9/0x300
[ 173.696591] do_blockdev_direct_IO+0x192b/0x2940
[ 173.696599] __blockdev_direct_IO+0x2e/0x30
[ 173.696640] btrfs_direct_IO+0x171/0x400 [btrfs]
[ 173.696647] generic_file_direct_write+0xa3/0x160
[ 173.696690] btrfs_file_write_iter+0x2fb/0x610 [btrfs]
[ 173.696695] aio_write+0x116/0x1a0
[ 173.696700] do_io_submit+0x42d/0x940
[ 173.696706] SyS_io_submit+0x10/0x20
[ 173.696714] entry_SYSCALL_64_fastpath+0x1f/0xbe
[ 173.696717]
[ 173.696722] Chain exists of:
[ 173.696738] Possible unsafe locking scenario:
[ 173.696742] CPU0 CPU1
[ 173.696745] ---- ----
[ 173.696748] lock(&ei->dio_sem);
[ 173.696755] lock(&ei->log_mutex);
[ 173.696762] lock(&ei->dio_sem);
[ 173.696768] lock(&mm->mmap_sem);
[ 173.696775]
[ 173.696781] 2 locks held by mysqld/1282:
[ 173.696785] #0: (sb_writers#10){.+.+}, at: [<ffffffff9434a001>]
aio_write+0x191/0x1a0
[ 173.696799] #1: (&ei->dio_sem){++++}, at: [<ffffffffc0320bcf>]
btrfs_direct_IO+0x39f/0x400 [btrfs]
[ 173.696846]
[ 173.696855] CPU: 0 PID: 1282 Comm: mysqld Tainted: G OE
4.14.0-0.rc2.git3.1.fc28.x86_64 #1
[ 173.696859] Hardware name: Sony Corporation VPCSB2M9E/VAIO, BIOS
R2087H4 06/15/2012
[ 173.696864] Call Trace:
[ 173.696875] dump_stack+0x8e/0xd6
[ 173.696884] print_circular_bug+0x1f6/0x2e0
[ 173.696893] ? copy_trace+0x90/0x90
[ 173.696901] check_prev_add+0x351/0x700
[ 173.696911] ? rcu_read_lock_sched_held+0x22/0x80
[ 173.696919] ? __module_address+0x2c/0xf0
[ 173.696932] __lock_acquire+0x1107/0x11d0
[ 173.696939] ? __lock_acquire+0x1107/0x11d0
[ 173.696947] ? copy_trace+0x90/0x90
[ 173.696958] lock_acquire+0xa3/0x1f0
[ 173.696966] ? get_user_pages_unlocked+0x5e/0x1b0
[ 173.696976] down_read+0x48/0xb0
[ 173.696983] ? get_user_pages_unlocked+0x5e/0x1b0
[ 173.696990] get_user_pages_unlocked+0x5e/0x1b0
[ 173.697000] get_user_pages_fast+0x7a/0xc0
[ 173.697009] iov_iter_get_pages+0xc9/0x300
[ 173.697020] do_blockdev_direct_IO+0x192b/0x2940
[ 173.697030] ? update_stack_state+0x144/0x160
[ 173.697071] ? btrfs_endio_direct_read+0xe0/0xe0 [btrfs]
[ 173.697113] ? btrfs_page_exists_in_range+0x310/0x310 [btrfs]
[ 173.697158] ? btrfs_page_exists_in_range+0x310/0x310 [btrfs]
[ 173.697195] ? btrfs_endio_direct_read+0xe0/0xe0 [btrfs]
[ 173.697209] __blockdev_direct_IO+0x2e/0x30
[ 173.697217] ? __blockdev_direct_IO+0x2e/0x30
[ 173.697254] ? btrfs_endio_direct_read+0xe0/0xe0 [btrfs]
[ 173.697291] btrfs_direct_IO+0x171/0x400 [btrfs]
[ 173.697328] ? btrfs_endio_direct_read+0xe0/0xe0 [btrfs]
[ 173.697339] generic_file_direct_write+0xa3/0x160
[ 173.697383] btrfs_file_write_iter+0x2fb/0x610 [btrfs]
[ 173.697391] ? rcu_read_lock_sched_held+0x79/0x80
[ 173.697400] aio_write+0x116/0x1a0
[ 173.697410] ? sched_clock+0x9/0x10
[ 173.697418] ? __might_fault+0x3e/0x90
[ 173.697427] do_io_submit+0x42d/0x940
[ 173.697432] ? do_io_submit+0x42d/0x940
[ 173.697441] ? __do_page_fault+0x296/0x510
[ 173.697451] SyS_io_submit+0x10/0x20
[ 173.697456] ? SyS_io_submit+0x10/0x20
[ 173.697464] entry_SYSCALL_64_fastpath+0x1f/0xbe
[ 173.697471] RIP: 0033:0x7f337131d687
[ 173.697476] RSP: 002b:00007f334c9d34a8 EFLAGS: 00000206 ORIG_RAX:
00000000000000d1
[ 173.697483] RAX: ffffffffffffffda RBX: 00007f335c694000 RCX: 00007f337131d687
[ 173.697487] RDX: 00007f334c9d34b0 RSI: 0000000000000001 RDI: 00007f3368e20000
[ 173.697492] RBP: 00007f334c9d3830 R08: 00007f334c9d34b0 R09: 0000000000000400
[ 173.697496] R10: 0000000000000000 R11: 0000000000000206 R12: 00007f335bd184a8
[ 173.697500] R13: 0000562b50713f48 R14: 00000011d1d47ffa R15: 0000000000000001
kloczek
--
Tomasz Kłoczko | LinkedIn: http://lnkd.in/FXPWxH
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