[12185.470791] run fstests generic/251 at 2023-10-28 00:15:21
[12185.899064] BTRFS: device fsid 442e5b9d-ccad-458f-8dc7-acd1904d321e devid 1 transid 1733055 /dev/mapper/vg0-lv0 scanned by mount (1596482)
[12185.899960] BTRFS info (device dm-0): using crc32c (crc32c-intel) checksum algorithm
[12185.899966] BTRFS info (device dm-0): using free space tree
[12185.904246] BTRFS info (device dm-0): auto enabling async discard
[12186.859398] BTRFS: device fsid aaf2593f-dcc3-40f3-86fa-075666af1a08 devid 1 transid 6 /dev/mapper/vg0-lv7 scanned by mount (1596540)
[12186.861889] BTRFS info (device dm-7): using crc32c (crc32c-intel) checksum algorithm
[12186.861897] BTRFS info (device dm-7): using free space tree
[12186.865874] BTRFS info (device dm-7): auto enabling async discard
[12186.866000] BTRFS info (device dm-7): checking UUID tree
[12658.349254] ======================================================
[12658.349442] WARNING: possible circular locking dependency detected
[12658.349773] 6.6.0-rc7+ #1341 Not tainted
[12658.349948] ------------------------------------------------------
[12658.350215] kswapd0/50 is trying to acquire lock:
[12658.350383] ffff9465c57ee390 (btrfs_trans_num_writers){++++}-{0:0}, at: join_transaction+0x1d0/0x580
[12658.351431]
but task is already holding lock:
[12658.351670] ffff9465dff79600 (sb_internal){++++}-{0:0}, at: btrfs_commit_inode_delayed_inode+0x5f/0x120
[12658.352259]
which lock already depends on the new lock.
[12658.352569]
the existing dependency chain (in reverse order) is:
[12658.352825]
-> #3 (sb_internal){++++}-{0:0}:
[12658.353047] start_transaction+0x493/0xad0
[12658.353215] btrfs_commit_inode_delayed_inode+0x5f/0x120
[12658.353397] btrfs_evict_inode+0x273/0x3c0
[12658.353888] evict+0xcc/0x1d0
[12658.354247] inode_lru_isolate+0x14d/0x1e0
[12658.354415] __list_lru_walk_one+0xbe/0x1c0
[12658.354794] list_lru_walk_one+0x58/0x80
[12658.354956] prune_icache_sb+0x39/0x60
[12658.355116] super_cache_scan+0x167/0x1f0
[12658.355502] do_shrink_slab+0x163/0x340
[12658.355883] shrink_slab+0x1d7/0x2a0
[12658.356038] shrink_node+0x2eb/0x7b0
[12658.356195] balance_pgdat+0x344/0x780
[12658.356356] kswapd+0x205/0x410
[12658.356503] kthread+0xff/0x130
[12658.356660] ret_from_fork+0x2d/0x50
[12658.356820] ret_from_fork_asm+0x1b/0x30
[12658.356981]
-> #2 (fs_reclaim){+.+.}-{0:0}:
[12658.357213] fs_reclaim_acquire+0xa2/0xe0
[12658.357648] kmem_cache_alloc_lru+0x4e/0x600
[12658.358084] btrfs_alloc_inode+0x2d/0x250
[12658.358366] alloc_inode+0x1a/0xc0
[12658.358531] iget5_locked+0xba/0x110
[12658.358696] btrfs_iget+0x43/0xe0
[12658.358848] create_reloc_inode+0x1a0/0x360
[12658.359011] btrfs_relocate_block_group+0x1d2/0x3d0
[12658.359213] btrfs_relocate_chunk+0x4c/0x1b0
[12658.359401] btrfs_balance+0x8e7/0x11d0
[12658.359588] btrfs_ioctl+0x1c25/0x2860
[12658.359776] __x64_sys_ioctl+0x8b/0xc0
[12658.360163] do_syscall_64+0x38/0x90
[12658.360507] entry_SYSCALL_64_after_hwframe+0x6e/0xd8
[12658.360955]
-> #1 (btrfs_trans_num_extwriters){++++}-{0:0}:
[12658.361252] join_transaction+0xaf/0x580
[12658.361432] start_transaction+0x1a0/0xad0
[12658.361602] btrfs_dirty_inode+0x40/0xd0
[12658.361805] touch_atime+0x133/0x220
[12658.361998] iterate_dir+0x117/0x180
[12658.362156] __x64_sys_getdents64+0x6a/0x120
[12658.362340] do_syscall_64+0x38/0x90
[12658.362496] entry_SYSCALL_64_after_hwframe+0x6e/0xd8
[12658.362690]
-> #0 (btrfs_trans_num_writers){++++}-{0:0}:
[12658.362931] __lock_acquire+0x1415/0x2190
[12658.363097] lock_acquire+0xc7/0x2b0
[12658.363310] join_transaction+0x1e4/0x580
[12658.363481] start_transaction+0x1a0/0xad0
[12658.363662] btrfs_commit_inode_delayed_inode+0x5f/0x120
[12658.363849] btrfs_evict_inode+0x273/0x3c0
[12658.364018] evict+0xcc/0x1d0
[12658.364166] inode_lru_isolate+0x14d/0x1e0
[12658.364328] __list_lru_walk_one+0xbe/0x1c0
[12658.364496] list_lru_walk_one+0x58/0x80
[12658.364663] prune_icache_sb+0x39/0x60
[12658.364825] super_cache_scan+0x167/0x1f0
[12658.364988] do_shrink_slab+0x163/0x340
[12658.365149] shrink_slab+0x1d7/0x2a0
[12658.365307] shrink_node+0x2eb/0x7b0
[12658.365466] balance_pgdat+0x344/0x780
[12658.365628] kswapd+0x205/0x410
[12658.365775] kthread+0xff/0x130
[12658.365926] ret_from_fork+0x2d/0x50
[12658.366083] ret_from_fork_asm+0x1b/0x30
[12658.366246]
other info that might help us debug this:
[12658.366540] Chain exists of:
btrfs_trans_num_writers --> fs_reclaim --> sb_internal
[12658.366937] Possible unsafe locking scenario:
[12658.367170] CPU0 CPU1
[12658.367329] ---- ----
[12658.367491] rlock(sb_internal);
[12658.367643] lock(fs_reclaim);
[12658.367825] lock(sb_internal);
[12658.368009] rlock(btrfs_trans_num_writers);
[12658.368168]
*** DEADLOCK ***
[12658.369555] 4 locks held by kswapd0/50:
[12658.369751] #0: ffffffff8de62ea0 (fs_reclaim){+.+.}-{0:0}, at: balance_pgdat+0x3eb/0x780
[12658.370074] #1: ffffffff8de513b0 (shrinker_rwsem){++++}-{3:3}, at: shrink_slab+0x113/0x2a0
[12658.370393] #2: ffff9465dff790e0 (&type->s_umount_key#35){++++}-{3:3}, at: super_cache_scan+0x38/0x1f0
[12658.370746] #3: ffff9465dff79600 (sb_internal){++++}-{0:0}, at: btrfs_commit_inode_delayed_inode+0x5f/0x120
[12658.371052]
stack backtrace:
[12658.371255] CPU: 1 PID: 50 Comm: kswapd0 Not tainted 6.6.0-rc7+ #1341
[12658.371454] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.13.0-2.fc32 04/01/2014
[12658.371786] Call Trace:
[12658.371918]
[12658.372060] dump_stack_lvl+0x58/0x90
[12658.372502] check_noncircular+0x101/0x110
[12658.372703] __lock_acquire+0x1415/0x2190
[12658.372909] lock_acquire+0xc7/0x2b0
[12658.373098] ? join_transaction+0x1d0/0x580
[12658.373261] ? lock_release+0x134/0x270
[12658.373417] ? join_transaction+0x1d0/0x580
[12658.373584] ? join_transaction+0x3d/0x580
[12658.373749] join_transaction+0x1e4/0x580
[12658.373909] ? join_transaction+0x1d0/0x580
[12658.374141] start_transaction+0x1a0/0xad0
[12658.374332] btrfs_commit_inode_delayed_inode+0x5f/0x120
[12658.374523] btrfs_evict_inode+0x273/0x3c0
[12658.374694] ? lock_release+0x134/0x270
[12658.374849] ? __pfx_wake_bit_function+0x10/0x10
[12658.375017] evict+0xcc/0x1d0
[12658.375153] inode_lru_isolate+0x14d/0x1e0
[12658.375309] __list_lru_walk_one+0xbe/0x1c0
[12658.375470] ? __pfx_inode_lru_isolate+0x10/0x10
[12658.375643] ? __pfx_inode_lru_isolate+0x10/0x10
[12658.375808] list_lru_walk_one+0x58/0x80
[12658.375962] prune_icache_sb+0x39/0x60
[12658.376115] super_cache_scan+0x167/0x1f0
[12658.376272] do_shrink_slab+0x163/0x340
[12658.376427] shrink_slab+0x1d7/0x2a0
[12658.376585] shrink_node+0x2eb/0x7b0
[12658.376772] balance_pgdat+0x344/0x780
[12658.376927] kswapd+0x205/0x410
[12658.377067] ? __pfx_autoremove_wake_function+0x10/0x10
[12658.377245] ? __pfx_kswapd+0x10/0x10
[12658.377396] kthread+0xff/0x130
[12658.377536] ? __pfx_kthread+0x10/0x10
[12658.377693] ret_from_fork+0x2d/0x50
[12658.377844] ? __pfx_kthread+0x10/0x10
[12658.377994] ret_from_fork_asm+0x1b/0x30
[12658.378150]
[13015.926775] BTRFS warning (device dm-7): failed to trim 7 block group(s), last error -512
[13022.111414] BTRFS: device fsid aaf2593f-dcc3-40f3-86fa-075666af1a08 devid 1 transid 94 /dev/mapper/vg0-lv7 scanned by mount (1605828)
[13022.112996] BTRFS info (device dm-7): using crc32c (crc32c-intel) checksum algorithm
[13022.113443] BTRFS info (device dm-7): using free space tree
[13022.116753] BTRFS info (device dm-7): auto enabling async discard