[38141.963936] run fstests generic/251 at 2023-10-24 07:28:03
[38142.422241] BTRFS: device fsid 442e5b9d-ccad-458f-8dc7-acd1904d321e devid 1 transid 1717331 /dev/mapper/vg0-lv0 scanned by mount (649932)
[38142.423191] BTRFS info (device dm-0): using crc32c (crc32c-intel) checksum algorithm
[38142.423199] BTRFS info (device dm-0): using free space tree
[38142.429058] BTRFS info (device dm-0): auto enabling async discard
[38142.696510] BTRFS: device fsid 9275aaef-55e2-457c-9cd9-10eb775683ac devid 1 transid 6 /dev/mapper/vg0-lv7 scanned by mount (649990)
[38142.697324] BTRFS info (device dm-7): using crc32c (crc32c-intel) checksum algorithm
[38142.697331] BTRFS info (device dm-7): use zlib compression, level 3
[38142.697336] BTRFS info (device dm-7): using free space tree
[38142.715121] BTRFS info (device dm-7): auto enabling async discard
[38142.715330] BTRFS info (device dm-7): checking UUID tree
[38391.904003] ======================================================
[38391.904744] WARNING: possible circular locking dependency detected
[38391.904988] 6.6.0-rc7+ #1337 Not tainted
[38391.909080] ------------------------------------------------------
[38391.909301] kswapd0/50 is trying to acquire lock:
[38391.909513] ffff92f3f8f3e390 (btrfs_trans_num_writers){++++}-{0:0}, at: join_transaction+0x1d0/0x580
[38391.911821]
but task is already holding lock:
[38391.912086] ffff92f390fe1600 (sb_internal){++++}-{0:0}, at: btrfs_commit_inode_delayed_inode+0x5f/0x120
[38391.912566]
which lock already depends on the new lock.
[38391.912923]
the existing dependency chain (in reverse order) is:
[38391.913297]
-> #3 (sb_internal){++++}-{0:0}:
[38391.913699] start_transaction+0x493/0xad0
[38391.913899] btrfs_commit_inode_delayed_inode+0x5f/0x120
[38391.914143] btrfs_evict_inode+0x273/0x3c0
[38391.914356] evict+0xcc/0x1d0
[38391.915491] inode_lru_isolate+0x14d/0x1e0
[38391.915695] __list_lru_walk_one+0xbe/0x1c0
[38391.916396] list_lru_walk_one+0x58/0x80
[38391.916671] prune_icache_sb+0x39/0x60
[38391.916935] super_cache_scan+0x167/0x1f0
[38391.917280] do_shrink_slab+0x163/0x340
[38391.917870] shrink_slab+0x1d7/0x2a0
[38391.918075] shrink_node+0x2eb/0x7b0
[38391.918263] balance_pgdat+0x344/0x780
[38391.918480] kswapd+0x205/0x410
[38391.918672] kthread+0xff/0x130
[38391.919875] ret_from_fork+0x2d/0x50
[38391.920664] ret_from_fork_asm+0x1b/0x30
[38391.921264]
-> #2 (fs_reclaim){+.+.}-{0:0}:
[38391.921528] fs_reclaim_acquire+0xa2/0xe0
[38391.921880] kmem_cache_alloc_lru+0x4e/0x600
[38391.922439] btrfs_alloc_inode+0x2d/0x250
[38391.922656] alloc_inode+0x1a/0xc0
[38391.922887] iget5_locked+0xba/0x110
[38391.923131] btrfs_iget+0x43/0xe0
[38391.923306] create_reloc_inode+0x1a0/0x360
[38391.923495] btrfs_relocate_block_group+0x1d2/0x3d0
[38391.923701] btrfs_relocate_chunk+0x4c/0x1b0
[38391.924105] btrfs_balance+0x8e7/0x11d0
[38391.924275] btrfs_ioctl+0x1c25/0x2860
[38391.924449] __x64_sys_ioctl+0x8b/0xc0
[38391.924781] do_syscall_64+0x38/0x90
[38391.926380] entry_SYSCALL_64_after_hwframe+0x6e/0xd8
[38391.927607]
-> #1 (btrfs_trans_num_extwriters){++++}-{0:0}:
[38391.927862] join_transaction+0xaf/0x580
[38391.928030] start_transaction+0x1a0/0xad0
[38391.928226] btrfs_dirty_inode+0x40/0xd0
[38391.928394] touch_atime+0x133/0x220
[38391.928575] filemap_read+0x2f0/0x300
[38391.929056] __kernel_read+0xef/0x2a0
[38391.929278] bprm_execve+0x2b0/0x870
[38391.929473] do_execveat_common+0x1b5/0x260
[38391.929668] __x64_sys_execve+0x39/0x50
[38391.929848] do_syscall_64+0x38/0x90
[38391.930026] entry_SYSCALL_64_after_hwframe+0x6e/0xd8
[38391.933190]
-> #0 (btrfs_trans_num_writers){++++}-{0:0}:
[38391.933468] __lock_acquire+0x1415/0x2190
[38391.933810] lock_acquire+0xc7/0x2b0
[38391.934309] join_transaction+0x1e4/0x580
[38391.934488] start_transaction+0x1a0/0xad0
[38391.934722] btrfs_commit_inode_delayed_inode+0x5f/0x120
[38391.934959] btrfs_evict_inode+0x273/0x3c0
[38391.935214] evict+0xcc/0x1d0
[38391.935451] inode_lru_isolate+0x14d/0x1e0
[38391.935699] __list_lru_walk_one+0xbe/0x1c0
[38391.935893] list_lru_walk_one+0x58/0x80
[38391.936060] prune_icache_sb+0x39/0x60
[38391.936248] super_cache_scan+0x167/0x1f0
[38391.936435] do_shrink_slab+0x163/0x340
[38391.936616] shrink_slab+0x1d7/0x2a0
[38391.936775] shrink_node+0x2eb/0x7b0
[38391.936940] balance_pgdat+0x344/0x780
[38391.937116] kswapd+0x205/0x410
[38391.937272] kthread+0xff/0x130
[38391.937444] ret_from_fork+0x2d/0x50
[38391.937631] ret_from_fork_asm+0x1b/0x30
[38391.937809]
other info that might help us debug this:
[38391.938141] Chain exists of:
btrfs_trans_num_writers --> fs_reclaim --> sb_internal
[38391.938560] Possible unsafe locking scenario:
[38391.938837] CPU0 CPU1
[38391.939023] ---- ----
[38391.939229] rlock(sb_internal);
[38391.939479] lock(fs_reclaim);
[38391.939757] lock(sb_internal);
[38391.939961] rlock(btrfs_trans_num_writers);
[38391.940138]
*** DEADLOCK ***
[38391.940428] 4 locks held by kswapd0/50:
[38391.940611] #0: ffffffffb2e62ea0 (fs_reclaim){+.+.}-{0:0}, at: balance_pgdat+0x3eb/0x780
[38391.940912] #1: ffffffffb2e513b0 (shrinker_rwsem){++++}-{3:3}, at: shrink_slab+0x113/0x2a0
[38391.941203] #2: ffff92f390fe10e0 (&type->s_umount_key#35){++++}-{3:3}, at: super_cache_scan+0x38/0x1f0
[38391.941524] #3: ffff92f390fe1600 (sb_internal){++++}-{0:0}, at: btrfs_commit_inode_delayed_inode+0x5f/0x120
[38391.941860]
stack backtrace:
[38391.942324] CPU: 1 PID: 50 Comm: kswapd0 Not tainted 6.6.0-rc7+ #1337
[38391.942552] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.13.0-2.fc32 04/01/2014
[38391.942846] Call Trace:
[38391.943000]
[38391.943257] dump_stack_lvl+0x58/0x90
[38391.943690] check_noncircular+0x101/0x110
[38391.943870] __lock_acquire+0x1415/0x2190
[38391.944057] lock_acquire+0xc7/0x2b0
[38391.944219] ? join_transaction+0x1d0/0x580
[38391.944402] ? lock_release+0x134/0x270
[38391.944586] ? join_transaction+0x1d0/0x580
[38391.944778] ? join_transaction+0x3d/0x580
[38391.944954] join_transaction+0x1e4/0x580
[38391.945133] ? join_transaction+0x1d0/0x580
[38391.945309] start_transaction+0x1a0/0xad0
[38391.945481] btrfs_commit_inode_delayed_inode+0x5f/0x120
[38391.945708] btrfs_evict_inode+0x273/0x3c0
[38391.945935] ? lock_release+0x134/0x270
[38391.946185] ? __pfx_wake_bit_function+0x10/0x10
[38391.946459] evict+0xcc/0x1d0
[38391.946657] inode_lru_isolate+0x14d/0x1e0
[38391.946847] __list_lru_walk_one+0xbe/0x1c0
[38391.947025] ? __pfx_inode_lru_isolate+0x10/0x10
[38391.947196] ? __pfx_inode_lru_isolate+0x10/0x10
[38391.947374] list_lru_walk_one+0x58/0x80
[38391.947566] prune_icache_sb+0x39/0x60
[38391.947734] super_cache_scan+0x167/0x1f0
[38391.947907] do_shrink_slab+0x163/0x340
[38391.948070] ? lock_is_held_type+0xe2/0x140
[38391.948240] shrink_slab+0x1d7/0x2a0
[38391.948410] shrink_node+0x2eb/0x7b0
[38391.948586] balance_pgdat+0x344/0x780
[38391.948763] kswapd+0x205/0x410
[38391.948919] ? __pfx_autoremove_wake_function+0x10/0x10
[38391.949117] ? __pfx_kswapd+0x10/0x10
[38391.949308] kthread+0xff/0x130
[38391.949512] ? __pfx_kthread+0x10/0x10
[38391.949753] ret_from_fork+0x2d/0x50
[38391.949963] ? __pfx_kthread+0x10/0x10
[38391.950129] ret_from_fork_asm+0x1b/0x30
[38391.950291]
[39042.423103] BTRFS warning (device dm-7): failed to trim 4 block group(s), last error -512
[39046.030561] BTRFS: device fsid 9275aaef-55e2-457c-9cd9-10eb775683ac devid 1 transid 94 /dev/mapper/vg0-lv7 scanned by mount (667244)
[39046.031562] BTRFS info (device dm-7): using crc32c (crc32c-intel) checksum algorithm
[39046.031869] BTRFS info (device dm-7): use zlib compression, level 3
[39046.032056] BTRFS info (device dm-7): using free space tree
[39046.034606] BTRFS info (device dm-7): auto enabling async discard