[29845.112046] run fstests generic/251 at 2023-11-09 05:11:28
[29845.584243] BTRFS: device fsid ec3e1159-917e-46d6-82d2-6d36aac552b0 devid 1 transid 3134102 /dev/mapper/vg0-lv0 scanned by mount (3835314)
[29845.585427] BTRFS info (device dm-0): using crc32c (crc32c-intel) checksum algorithm
[29845.585433] BTRFS info (device dm-0): using free space tree
[29845.589738] BTRFS info (device dm-0): auto enabling async discard
[29845.871868] BTRFS: device fsid fb42cd14-e0f6-4a55-a38b-21938001d065 devid 1 transid 6 /dev/mapper/vg0-lv9 scanned by mount (3835372)
[29845.872945] BTRFS info (device dm-9): using crc32c (crc32c-intel) checksum algorithm
[29845.872953] BTRFS info (device dm-9): setting incompat feature flag for COMPRESS_ZSTD (0x10)
[29845.872956] BTRFS info (device dm-9): use zstd compression, level 3
[29845.872960] BTRFS info (device dm-9): turning on async discard
[29845.872962] BTRFS info (device dm-9): disk space caching is enabled
[29845.878604] BTRFS info (device dm-9): checking UUID tree
[30156.932684] ======================================================
[30156.933023] WARNING: possible circular locking dependency detected
[30156.933338] 6.6.0-rc7+ #1353 Not tainted
[30156.933543] ------------------------------------------------------
[30156.933865] kswapd0/50 is trying to acquire lock:
[30156.934110] ffff95a601ede390 (btrfs_trans_num_writers){++++}-{0:0}, at: join_transaction+0x1d0/0x580
[30156.936461]
but task is already holding lock:
[30156.936764] ffff95a634a41600 (sb_internal#2){++++}-{0:0}, at: btrfs_commit_inode_delayed_inode+0x5f/0x120
[30156.937266]
which lock already depends on the new lock.
[30156.937678]
the existing dependency chain (in reverse order) is:
[30156.938066]
-> #3 (sb_internal#2){++++}-{0:0}:
[30156.938381] start_transaction+0x493/0xad0
[30156.938676] btrfs_commit_inode_delayed_inode+0x5f/0x120
[30156.939041] btrfs_evict_inode+0x273/0x3c0
[30156.939320] evict+0xcc/0x1d0
[30156.939529] inode_lru_isolate+0x14d/0x1e0
[30156.939802] __list_lru_walk_one+0xbe/0x1c0
[30156.940104] list_lru_walk_one+0x58/0x80
[30156.940396] prune_icache_sb+0x39/0x60
[30156.940663] super_cache_scan+0x167/0x1f0
[30156.940952] do_shrink_slab+0x163/0x340
[30156.941232] shrink_slab+0x1d7/0x2a0
[30156.941485] shrink_node+0x2eb/0x7b0
[30156.941737] balance_pgdat+0x344/0x780
[30156.942005] kswapd+0x205/0x410
[30156.942233] kthread+0xff/0x130
[30156.942472] ret_from_fork+0x2d/0x50
[30156.942728] ret_from_fork_asm+0x1b/0x30
[30156.943016]
-> #2 (fs_reclaim){+.+.}-{0:0}:
[30156.943328] fs_reclaim_acquire+0xa2/0xe0
[30156.943587] kmem_cache_alloc_lru+0x4e/0x600
[30156.943859] btrfs_alloc_inode+0x2d/0x250
[30156.944110] alloc_inode+0x1a/0xc0
[30156.944328] iget5_locked+0xba/0x110
[30156.944555] btrfs_iget+0x43/0xe0
[30156.944768] create_reloc_inode+0x1a0/0x360
[30156.945033] btrfs_relocate_block_group+0x1d2/0x3d0
[30156.945323] btrfs_relocate_chunk+0x4c/0x1b0
[30156.945584] btrfs_balance+0x8e7/0x11d0
[30156.945827] btrfs_ioctl+0x1c25/0x2860
[30156.946063] __x64_sys_ioctl+0x8b/0xc0
[30156.946300] do_syscall_64+0x38/0x90
[30156.946534] entry_SYSCALL_64_after_hwframe+0x6e/0xd8
[30156.946846]
-> #1 (btrfs_trans_num_extwriters){++++}-{0:0}:
[30156.947224] join_transaction+0xaf/0x580
[30156.947464] start_transaction+0x1a0/0xad0
[30156.947713] btrfs_uuid_scan_kthread+0x2bc/0x3d0
[30156.948002] kthread+0xff/0x130
[30156.948205] ret_from_fork+0x2d/0x50
[30156.948432] ret_from_fork_asm+0x1b/0x30
[30156.948677]
-> #0 (btrfs_trans_num_writers){++++}-{0:0}:
[30156.949049] __lock_acquire+0x1415/0x2190
[30156.949306] lock_acquire+0xc7/0x2b0
[30156.949532] join_transaction+0x1e4/0x580
[30156.949783] start_transaction+0x1a0/0xad0
[30156.950085] btrfs_commit_inode_delayed_inode+0x5f/0x120
[30156.950402] btrfs_evict_inode+0x273/0x3c0
[30156.950659] evict+0xcc/0x1d0
[30156.950876] inode_lru_isolate+0x14d/0x1e0
[30156.951153] __list_lru_walk_one+0xbe/0x1c0
[30156.951416] list_lru_walk_one+0x58/0x80
[30156.951660] prune_icache_sb+0x39/0x60
[30156.951907] super_cache_scan+0x167/0x1f0
[30156.952159] do_shrink_slab+0x163/0x340
[30156.952404] shrink_slab+0x1d7/0x2a0
[30156.952631] shrink_node+0x2eb/0x7b0
[30156.952862] balance_pgdat+0x344/0x780
[30156.953100] kswapd+0x205/0x410
[30156.953305] kthread+0xff/0x130
[30156.953548] ret_from_fork+0x2d/0x50
[30156.953801] ret_from_fork_asm+0x1b/0x30
[30156.954061]
other info that might help us debug this:
[30156.954483] Chain exists of:
btrfs_trans_num_writers --> fs_reclaim --> sb_internal#2
[30156.955042] Possible unsafe locking scenario:
[30156.955344] CPU0 CPU1
[30156.955577] ---- ----
[30156.955810] rlock(sb_internal#2);
[30156.956000] lock(fs_reclaim);
[30156.956292] lock(sb_internal#2);
[30156.956595] rlock(btrfs_trans_num_writers);
[30156.956827]
*** DEADLOCK ***
[30156.957130] 4 locks held by kswapd0/50:
[30156.957330] #0: ffffffff97e62ea0 (fs_reclaim){+.+.}-{0:0}, at: balance_pgdat+0x3eb/0x780
[30156.957746] #1: ffffffff97e513b0 (shrinker_rwsem){++++}-{3:3}, at: shrink_slab+0x113/0x2a0
[30156.958174] #2: ffff95a634a410e0 (&type->s_umount_key#45){++++}-{3:3}, at: super_cache_scan+0x38/0x1f0
[30156.958650] #3: ffff95a634a41600 (sb_internal#2){++++}-{0:0}, at: btrfs_commit_inode_delayed_inode+0x5f/0x120
[30156.959163]
stack backtrace:
[30156.959395] CPU: 0 PID: 50 Comm: kswapd0 Not tainted 6.6.0-rc7+ #1353
[30156.959830] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.13.0-2.fc32 04/01/2014
[30156.960263] Call Trace:
[30156.960398]
[30156.960516] dump_stack_lvl+0x58/0x90
[30156.960714] check_noncircular+0x101/0x110
[30156.960934] __lock_acquire+0x1415/0x2190
[30156.961144] lock_acquire+0xc7/0x2b0
[30156.961334] ? join_transaction+0x1d0/0x580
[30156.961555] ? lock_release+0x134/0x270
[30156.961756] ? join_transaction+0x1d0/0x580
[30156.961982] ? join_transaction+0x3d/0x580
[30156.962200] join_transaction+0x1e4/0x580
[30156.962408] ? join_transaction+0x1d0/0x580
[30156.962625] start_transaction+0x1a0/0xad0
[30156.962849] btrfs_commit_inode_delayed_inode+0x5f/0x120
[30156.963125] btrfs_evict_inode+0x273/0x3c0
[30156.963338] ? lock_release+0x134/0x270
[30156.963541] ? __pfx_wake_bit_function+0x10/0x10
[30156.963780] evict+0xcc/0x1d0
[30156.963947] inode_lru_isolate+0x14d/0x1e0
[30156.964160] __list_lru_walk_one+0xbe/0x1c0
[30156.964380] ? __pfx_inode_lru_isolate+0x10/0x10
[30156.964621] ? __pfx_inode_lru_isolate+0x10/0x10
[30156.964870] list_lru_walk_one+0x58/0x80
[30156.965078] prune_icache_sb+0x39/0x60
[30156.965276] super_cache_scan+0x167/0x1f0
[30156.965486] do_shrink_slab+0x163/0x340
[30156.965688] ? lock_is_held_type+0xe2/0x140
[30156.966150] shrink_slab+0x1d7/0x2a0
[30156.966343] shrink_node+0x2eb/0x7b0
[30156.966534] balance_pgdat+0x344/0x780
[30156.966736] kswapd+0x205/0x410
[30156.966917] ? __pfx_autoremove_wake_function+0x10/0x10
[30156.967191] ? __pfx_kswapd+0x10/0x10
[30156.967384] kthread+0xff/0x130
[30156.967555] ? __pfx_kthread+0x10/0x10
[30156.967755] ret_from_fork+0x2d/0x50
[30156.967949] ? __pfx_kthread+0x10/0x10
[30156.968147] ret_from_fork_asm+0x1b/0x30
[30156.968357]
[30623.772185] BTRFS: device fsid fb42cd14-e0f6-4a55-a38b-21938001d065 devid 1 transid 78 /dev/mapper/vg0-lv9 scanned by mount (3889294)
[30623.773790] BTRFS info (device dm-9): using crc32c (crc32c-intel) checksum algorithm
[30623.774402] BTRFS info (device dm-9): use zstd compression, level 3
[30623.774997] BTRFS info (device dm-9): turning on async discard
[30623.775553] BTRFS info (device dm-9): disk space caching is enabled