[12541.998582] run fstests generic/251 at 2023-10-26 00:22:12
[12542.564566] BTRFS: device fsid ec3e1159-917e-46d6-82d2-6d36aac552b0 devid 1 transid 3024119 /dev/mapper/vg0-lv0 scanned by mount (1603838)
[12542.565921] BTRFS info (device dm-0): using crc32c (crc32c-intel) checksum algorithm
[12542.565928] BTRFS info (device dm-0): using free space tree
[12542.570213] BTRFS info (device dm-0): auto enabling async discard
[12543.103830] BTRFS: device fsid 3e421dd5-32db-4871-bacc-f28d033ddb56 devid 1 transid 6 /dev/mapper/vg0-lv9 scanned by mount (1603893)
[12543.104904] BTRFS info (device dm-9): using crc32c (crc32c-intel) checksum algorithm
[12543.104914] BTRFS info (device dm-9): turning on async discard
[12543.104917] BTRFS info (device dm-9): disk space caching is enabled
[12543.108435] BTRFS info (device dm-9): checking UUID tree
[12772.476908] ======================================================
[12772.477315] WARNING: possible circular locking dependency detected
[12772.477722] 6.6.0-rc7+ #1339 Not tainted
[12772.477948] ------------------------------------------------------
[12772.478328] kswapd0/51 is trying to acquire lock:
[12772.478601] ffff9d305617e390 (btrfs_trans_num_writers){++++}-{0:0}, at: join_transaction+0x1d0/0x580
[12772.479186]
but task is already holding lock:
[12772.479525] ffff9d304252f600 (sb_internal#2){++++}-{0:0}, at: btrfs_commit_inode_delayed_inode+0x5f/0x120
[12772.480232]
which lock already depends on the new lock.
[12772.480861]
the existing dependency chain (in reverse order) is:
[12772.481417]
-> #3 (sb_internal#2){++++}-{0:0}:
[12772.481885] start_transaction+0x493/0xad0
[12772.482234] btrfs_commit_inode_delayed_inode+0x5f/0x120
[12772.482686] btrfs_evict_inode+0x273/0x3c0
[12772.483054] evict+0xcc/0x1d0
[12772.483337] inode_lru_isolate+0x14d/0x1e0
[12772.483692] __list_lru_walk_one+0xbe/0x1c0
[12772.484206] list_lru_walk_one+0x58/0x80
[12772.484686] prune_icache_sb+0x39/0x60
[12772.485161] super_cache_scan+0x167/0x1f0
[12772.485652] do_shrink_slab+0x163/0x340
[12772.486082] shrink_slab+0x1d7/0x2a0
[12772.486513] shrink_node+0x2eb/0x7b0
[12772.486956] balance_pgdat+0x344/0x780
[12772.487420] kswapd+0x205/0x410
[12772.487817] kthread+0xff/0x130
[12772.488209] ret_from_fork+0x2d/0x50
[12772.488651] ret_from_fork_asm+0x1b/0x30
[12772.489124]
-> #2 (fs_reclaim){+.+.}-{0:0}:
[12772.489741] fs_reclaim_acquire+0xa2/0xe0
[12772.490254] kmem_cache_alloc_lru+0x4e/0x600
[12772.490776] btrfs_alloc_inode+0x2d/0x250
[12772.491264] alloc_inode+0x1a/0xc0
[12772.491693] iget5_locked+0xba/0x110
[12772.492106] btrfs_iget+0x43/0xe0
[12772.492530] create_reloc_inode+0x1a0/0x360
[12772.492974] btrfs_relocate_block_group+0x1d2/0x3d0
[12772.493544] btrfs_relocate_chunk+0x4c/0x1b0
[12772.494076] btrfs_balance+0x8e7/0x11d0
[12772.494559] btrfs_ioctl+0x1c25/0x2860
[12772.495021] __x64_sys_ioctl+0x8b/0xc0
[12772.495504] do_syscall_64+0x38/0x90
[12772.495971] entry_SYSCALL_64_after_hwframe+0x6e/0xd8
[12772.496568]
-> #1 (btrfs_trans_num_extwriters){++++}-{0:0}:
[12772.497293] join_transaction+0xaf/0x580
[12772.497748] start_transaction+0x1a0/0xad0
[12772.498241] btrfs_uuid_scan_kthread+0x2bc/0x3d0
[12772.498803] kthread+0xff/0x130
[12772.499176] ret_from_fork+0x2d/0x50
[12772.499623] ret_from_fork_asm+0x1b/0x30
[12772.500097]
-> #0 (btrfs_trans_num_writers){++++}-{0:0}:
[12772.500788] __lock_acquire+0x1415/0x2190
[12772.501263] lock_acquire+0xc7/0x2b0
[12772.501696] join_transaction+0x1e4/0x580
[12772.502186] start_transaction+0x1a0/0xad0
[12772.502696] btrfs_commit_inode_delayed_inode+0x5f/0x120
[12772.503306] btrfs_evict_inode+0x273/0x3c0
[12772.503808] evict+0xcc/0x1d0
[12772.504200] inode_lru_isolate+0x14d/0x1e0
[12772.504706] __list_lru_walk_one+0xbe/0x1c0
[12772.505211] list_lru_walk_one+0x58/0x80
[12772.505702] prune_icache_sb+0x39/0x60
[12772.506136] super_cache_scan+0x167/0x1f0
[12772.506605] do_shrink_slab+0x163/0x340
[12772.507101] shrink_slab+0x1d7/0x2a0
[12772.507552] shrink_node+0x2eb/0x7b0
[12772.507994] balance_pgdat+0x344/0x780
[12772.508450] kswapd+0x205/0x410
[12772.508848] kthread+0xff/0x130
[12772.509255] ret_from_fork+0x2d/0x50
[12772.509704] ret_from_fork_asm+0x1b/0x30
[12772.510173]
other info that might help us debug this:
[12772.511018] Chain exists of:
btrfs_trans_num_writers --> fs_reclaim --> sb_internal#2
[12772.512147] Possible unsafe locking scenario:
[12772.512747] CPU0 CPU1
[12772.513208] ---- ----
[12772.513716] rlock(sb_internal#2);
[12772.514130] lock(fs_reclaim);
[12772.514729] lock(sb_internal#2);
[12772.515327] rlock(btrfs_trans_num_writers);
[12772.515806]
*** DEADLOCK ***
[12772.516439] 4 locks held by kswapd0/51:
[12772.516823] #0: ffffffffa2e62ea0 (fs_reclaim){+.+.}-{0:0}, at: balance_pgdat+0x3eb/0x780
[12772.517587] #1: ffffffffa2e513b0 (shrinker_rwsem){++++}-{3:3}, at: shrink_slab+0x113/0x2a0
[12772.518464] #2: ffff9d304252f0e0 (&type->s_umount_key#45){++++}-{3:3}, at: super_cache_scan+0x38/0x1f0
[12772.519429] #3: ffff9d304252f600 (sb_internal#2){++++}-{0:0}, at: btrfs_commit_inode_delayed_inode+0x5f/0x120
[12772.520404]
stack backtrace:
[12772.520783] CPU: 1 PID: 51 Comm: kswapd0 Not tainted 6.6.0-rc7+ #1339
[12772.521237] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.13.0-2.fc32 04/01/2014
[12772.521968] Call Trace:
[12772.522288]
[12772.522537] dump_stack_lvl+0x58/0x90
[12772.522885] check_noncircular+0x101/0x110
[12772.523267] __lock_acquire+0x1415/0x2190
[12772.523589] lock_acquire+0xc7/0x2b0
[12772.523916] ? join_transaction+0x1d0/0x580
[12772.524342] ? lock_release+0x134/0x270
[12772.524783] ? join_transaction+0x1d0/0x580
[12772.525166] ? join_transaction+0x3d/0x580
[12772.525555] join_transaction+0x1e4/0x580
[12772.525923] ? join_transaction+0x1d0/0x580
[12772.526316] start_transaction+0x1a0/0xad0
[12772.526725] btrfs_commit_inode_delayed_inode+0x5f/0x120
[12772.527202] btrfs_evict_inode+0x273/0x3c0
[12772.527558] ? lock_release+0x134/0x270
[12772.527942] ? __pfx_wake_bit_function+0x10/0x10
[12772.528462] evict+0xcc/0x1d0
[12772.528763] inode_lru_isolate+0x14d/0x1e0
[12772.529124] __list_lru_walk_one+0xbe/0x1c0
[12772.529535] ? __pfx_inode_lru_isolate+0x10/0x10
[12772.529948] ? __pfx_inode_lru_isolate+0x10/0x10
[12772.530399] list_lru_walk_one+0x58/0x80
[12772.530754] prune_icache_sb+0x39/0x60
[12772.531029] super_cache_scan+0x167/0x1f0
[12772.531412] do_shrink_slab+0x163/0x340
[12772.531779] ? lock_is_held_type+0xe2/0x140
[12772.532187] shrink_slab+0x1d7/0x2a0
[12772.532555] shrink_node+0x2eb/0x7b0
[12772.532883] balance_pgdat+0x344/0x780
[12772.533260] kswapd+0x205/0x410
[12772.533493] ? __pfx_autoremove_wake_function+0x10/0x10
[12772.533973] ? __pfx_kswapd+0x10/0x10
[12772.534360] kthread+0xff/0x130
[12772.534665] ? __pfx_kthread+0x10/0x10
[12772.534948] ret_from_fork+0x2d/0x50
[12772.535304] ? __pfx_kthread+0x10/0x10
[12772.535672] ret_from_fork_asm+0x1b/0x30
[12772.536048]
[13386.220956] BTRFS: device fsid 3e421dd5-32db-4871-bacc-f28d033ddb56 devid 1 transid 94 /dev/mapper/vg0-lv9 scanned by mount (1614153)
[13386.222060] BTRFS info (device dm-9): using crc32c (crc32c-intel) checksum algorithm
[13386.222418] BTRFS info (device dm-9): turning on async discard
[13386.222675] BTRFS info (device dm-9): disk space caching is enabled