[35052.174855] run fstests generic/251 at 2023-10-20 06:39:32
[35052.778436] BTRFS: device fsid 13921637-4436-40f4-9cb4-e48f1103a380 devid 1 transid 2653970 /dev/mapper/vg0-lv0 scanned by mount (804549)
[35052.779510] BTRFS info (device dm-0): using crc32c (crc32c-intel) checksum algorithm
[35052.779516] BTRFS info (device dm-0): using free space tree
[35052.783691] BTRFS info (device dm-0): auto enabling async discard
[35052.996320] BTRFS: device fsid 0d3ab505-2852-4fa7-bbe8-54be7c3e7889 devid 1 transid 6 /dev/mapper/vg0-lv9 scanned by mount (804607)
[35052.997134] BTRFS info (device dm-9): using crc32c (crc32c-intel) checksum algorithm
[35052.997141] BTRFS info (device dm-9): setting incompat feature flag for COMPRESS_LZO (0x8)
[35052.997144] BTRFS info (device dm-9): use lzo compression, level 0
[35052.997146] BTRFS info (device dm-9): disk space caching is enabled
[35053.002510] BTRFS info (device dm-9): auto enabling async discard
[35053.002800] BTRFS info (device dm-9): checking UUID tree
[35394.339747] ======================================================
[35394.340260] WARNING: possible circular locking dependency detected
[35394.340778] 6.6.0-rc5+ #1333 Not tainted
[35394.341109] ------------------------------------------------------
[35394.341627] kswapd0/51 is trying to acquire lock:
[35394.342022] ffff8f63919c6390 (btrfs_trans_num_writers){++++}-{0:0}, at: join_transaction+0x1d0/0x580
[35394.342883]
but task is already holding lock:
[35394.343371] ffff8f63829f9600 (sb_internal#2){++++}-{0:0}, at: btrfs_commit_inode_delayed_inode+0x5f/0x120
[35394.344171]
which lock already depends on the new lock.
[35394.344844]
the existing dependency chain (in reverse order) is:
[35394.345459]
-> #3 (sb_internal#2){++++}-{0:0}:
[35394.345929] start_transaction+0x493/0xad0
[35394.346242] btrfs_commit_inode_delayed_inode+0x5f/0x120
[35394.346603] btrfs_evict_inode+0x273/0x3c0
[35394.346901] evict+0xcc/0x1d0
[35394.347135] inode_lru_isolate+0x14d/0x1e0
[35394.347415] __list_lru_walk_one+0xbe/0x1c0
[35394.347709] list_lru_walk_one+0x58/0x80
[35394.347979] prune_icache_sb+0x39/0x60
[35394.348255] super_cache_scan+0x167/0x1f0
[35394.348663] do_shrink_slab+0x163/0x340
[35394.349063] shrink_slab+0x1d7/0x2a0
[35394.349422] shrink_node+0x2eb/0x7b0
[35394.349792] balance_pgdat+0x344/0x780
[35394.350177] kswapd+0x205/0x410
[35394.350518] kthread+0xff/0x130
[35394.350845] ret_from_fork+0x2d/0x50
[35394.351206] ret_from_fork_asm+0x1b/0x30
[35394.351626]
-> #2 (fs_reclaim){+.+.}-{0:0}:
[35394.352113] fs_reclaim_acquire+0xa2/0xe0
[35394.352508] kmem_cache_alloc_lru+0x4e/0x600
[35394.352928] btrfs_alloc_inode+0x2d/0x250
[35394.353325] alloc_inode+0x1a/0xc0
[35394.353665] iget5_locked+0xba/0x110
[35394.354018] btrfs_iget+0x43/0xe0
[35394.354352] create_reloc_inode+0x1a0/0x360
[35394.354758] btrfs_relocate_block_group+0x1d2/0x3d0
[35394.355222] btrfs_relocate_chunk+0x4c/0x1b0
[35394.355637] btrfs_balance+0x8e7/0x11d0
[35394.356013] btrfs_ioctl+0x1c25/0x2860
[35394.356388] __x64_sys_ioctl+0x8b/0xc0
[35394.356771] do_syscall_64+0x38/0x90
[35394.357124] entry_SYSCALL_64_after_hwframe+0x6e/0xd8
[35394.357603]
-> #1 (btrfs_trans_num_extwriters){++++}-{0:0}:
[35394.358195] join_transaction+0xaf/0x580
[35394.358577] start_transaction+0x1a0/0xad0
[35394.358965] btrfs_uuid_scan_kthread+0x2bc/0x3d0
[35394.359394] kthread+0xff/0x130
[35394.359711] ret_from_fork+0x2d/0x50
[35394.360054] ret_from_fork_asm+0x1b/0x30
[35394.360428]
-> #0 (btrfs_trans_num_writers){++++}-{0:0}:
[35394.360990] __lock_acquire+0x1415/0x2190
[35394.361371] lock_acquire+0xc7/0x2b0
[35394.361720] join_transaction+0x1e4/0x580
[35394.362103] start_transaction+0x1a0/0xad0
[35394.362495] btrfs_commit_inode_delayed_inode+0x5f/0x120
[35394.362985] btrfs_evict_inode+0x273/0x3c0
[35394.363376] evict+0xcc/0x1d0
[35394.363678] inode_lru_isolate+0x14d/0x1e0
[35394.364060] __list_lru_walk_one+0xbe/0x1c0
[35394.364455] list_lru_walk_one+0x58/0x80
[35394.364823] prune_icache_sb+0x39/0x60
[35394.365184] super_cache_scan+0x167/0x1f0
[35394.365582] do_shrink_slab+0x163/0x340
[35394.365939] shrink_slab+0x1d7/0x2a0
[35394.366271] shrink_node+0x2eb/0x7b0
[35394.366611] balance_pgdat+0x344/0x780
[35394.366959] kswapd+0x205/0x410
[35394.367257] kthread+0xff/0x130
[35394.367586] ret_from_fork+0x2d/0x50
[35394.367928] ret_from_fork_asm+0x1b/0x30
[35394.368299]
other info that might help us debug this:
[35394.368951] Chain exists of:
btrfs_trans_num_writers --> fs_reclaim --> sb_internal#2
[35394.369837] Possible unsafe locking scenario:
[35394.370328] CPU0 CPU1
[35394.370708] ---- ----
[35394.371084] rlock(sb_internal#2);
[35394.371381] lock(fs_reclaim);
[35394.371853] lock(sb_internal#2);
[35394.372440] rlock(btrfs_trans_num_writers);
[35394.372816]
*** DEADLOCK ***
[35394.373305] 4 locks held by kswapd0/51:
[35394.373635] #0: ffffffff83e62ea0 (fs_reclaim){+.+.}-{0:0}, at: balance_pgdat+0x3eb/0x780
[35394.374308] #1: ffffffff83e513b0 (shrinker_rwsem){++++}-{3:3}, at: shrink_slab+0x113/0x2a0
[35394.375006] #2: ffff8f63829f90e0 (&type->s_umount_key#45){++++}-{3:3}, at: super_cache_scan+0x38/0x1f0
[35394.375776] #3: ffff8f63829f9600 (sb_internal#2){++++}-{0:0}, at: btrfs_commit_inode_delayed_inode+0x5f/0x120
[35394.376593]
stack backtrace:
[35394.376962] CPU: 0 PID: 51 Comm: kswapd0 Not tainted 6.6.0-rc5+ #1333
[35394.377490] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.13.0-2.fc32 04/01/2014
[35394.378184] Call Trace:
[35394.378396]
[35394.378590] dump_stack_lvl+0x58/0x90
[35394.378906] check_noncircular+0x101/0x110
[35394.379253] __lock_acquire+0x1415/0x2190
[35394.379600] lock_acquire+0xc7/0x2b0
[35394.379904] ? join_transaction+0x1d0/0x580
[35394.380256] ? lock_release+0x134/0x270
[35394.380582] ? join_transaction+0x1d0/0x580
[35394.380935] ? join_transaction+0x3d/0x580
[35394.381278] join_transaction+0x1e4/0x580
[35394.381619] ? join_transaction+0x1d0/0x580
[35394.381982] start_transaction+0x1a0/0xad0
[35394.382323] btrfs_commit_inode_delayed_inode+0x5f/0x120
[35394.382760] btrfs_evict_inode+0x273/0x3c0
[35394.383093] ? lock_release+0x134/0x270
[35394.383408] ? __pfx_wake_bit_function+0x10/0x10
[35394.383788] evict+0xcc/0x1d0
[35394.384040] inode_lru_isolate+0x14d/0x1e0
[35394.384375] __list_lru_walk_one+0xbe/0x1c0
[35394.384721] ? __pfx_inode_lru_isolate+0x10/0x10
[35394.385098] ? __pfx_inode_lru_isolate+0x10/0x10
[35394.385476] list_lru_walk_one+0x58/0x80
[35394.385796] prune_icache_sb+0x39/0x60
[35394.386104] super_cache_scan+0x167/0x1f0
[35394.386437] do_shrink_slab+0x163/0x340
[35394.386779] shrink_slab+0x1d7/0x2a0
[35394.387087] shrink_node+0x2eb/0x7b0
[35394.387395] balance_pgdat+0x344/0x780
[35394.387737] kswapd+0x205/0x410
[35394.388004] ? __pfx_autoremove_wake_function+0x10/0x10
[35394.388418] ? __pfx_kswapd+0x10/0x10
[35394.388721] kthread+0xff/0x130
[35394.388987] ? __pfx_kthread+0x10/0x10
[35394.389295] ret_from_fork+0x2d/0x50
[35394.389609] ? __pfx_kthread+0x10/0x10
[35394.389910] ret_from_fork_asm+0x1b/0x30
[35394.390228]
[35845.404572] BTRFS: device fsid 0d3ab505-2852-4fa7-bbe8-54be7c3e7889 devid 1 transid 82 /dev/mapper/vg0-lv9 scanned by mount (883957)
[35845.405884] BTRFS info (device dm-9): using crc32c (crc32c-intel) checksum algorithm
[35845.406420] BTRFS info (device dm-9): use lzo compression, level 0
[35845.406865] BTRFS info (device dm-9): disk space caching is enabled
[35845.410055] BTRFS info (device dm-9): auto enabling async discard