[51991.268469] run fstests generic/251 at 2023-07-13 11:21:28
[51991.688719] BTRFS: device fsid ec3e1159-917e-46d6-82d2-6d36aac552b0 devid 1 transid 2305829 /dev/mapper/vg0-lv0 scanned by mount (3778453)
[51991.689823] BTRFS info (device dm-0): using crc32c (crc32c-intel) checksum algorithm
[51991.689830] BTRFS info (device dm-0): using free space tree
[51991.693990] BTRFS info (device dm-0): auto enabling async discard
[51991.880118] BTRFS: device fsid 06df285a-d975-45af-b618-9ff25b378d13 devid 1 transid 6 /dev/mapper/vg0-lv9 scanned by mkfs.btrfs (3778501)
[51991.915292] BTRFS info (device dm-9): using crc32c (crc32c-intel) checksum algorithm
[51991.915301] BTRFS info (device dm-9): turning on sync discard
[51991.915304] BTRFS info (device dm-9): enabling free space tree
[51991.915305] BTRFS info (device dm-9): using free space tree
[51991.918470] BTRFS info (device dm-9): creating free space tree
[51991.919098] BTRFS info (device dm-9): setting compat-ro feature flag for FREE_SPACE_TREE (0x1)
[51991.919102] BTRFS info (device dm-9): setting compat-ro feature flag for FREE_SPACE_TREE_VALID (0x2)
[51991.926917] BTRFS info (device dm-9): cleaning free space cache v1
[51991.934311] BTRFS info (device dm-9): checking UUID tree
[52242.008714] ======================================================
[52242.008936] WARNING: possible circular locking dependency detected
[52242.009161] 6.5.0-rc1+ #1238 Not tainted
[52242.009303] ------------------------------------------------------
[52242.009520] kswapd0/47 is trying to acquire lock:
[52242.009689] ffff8bcd442a2378 (btrfs_trans_num_writers){++++}-{0:0}, at: join_transaction+0x19f/0x550
[52242.010019]
but task is already holding lock:
[52242.010231] ffff8bcd43592600 (sb_internal#2){++++}-{0:0}, at: btrfs_commit_inode_delayed_inode+0x5f/0x120
[52242.010570]
which lock already depends on the new lock.
[52242.010854]
the existing dependency chain (in reverse order) is:
[52242.011117]
-> #3 (sb_internal#2){++++}-{0:0}:
[52242.011334] start_transaction+0x401/0x730
[52242.011504] btrfs_commit_inode_delayed_inode+0x5f/0x120
[52242.011713] btrfs_evict_inode+0x273/0x3c0
[52242.011883] evict+0xcc/0x1d0
[52242.012014] inode_lru_isolate+0x14d/0x1e0
[52242.012186] __list_lru_walk_one+0xbe/0x1c0
[52242.012358] list_lru_walk_one+0x58/0x80
[52242.012521] prune_icache_sb+0x39/0x60
[52242.012678] super_cache_scan+0x161/0x1f0
[52242.012844] do_shrink_slab+0x163/0x340
[52242.013005] shrink_slab+0x1d7/0x2a0
[52242.013157] shrink_node+0x2eb/0x7b0
[52242.013307] balance_pgdat+0x344/0x780
[52242.013466] kswapd+0x205/0x410
[52242.013602] kthread+0xfc/0x130
[52242.013743] ret_from_fork+0x29/0x50
[52242.013898]
-> #2 (fs_reclaim){+.+.}-{0:0}:
[52242.014103] fs_reclaim_acquire+0xa5/0xe0
[52242.014273] kmem_cache_alloc_lru+0x4e/0x570
[52242.014448] btrfs_alloc_inode+0x2d/0x250
[52242.014613] alloc_inode+0x1a/0xc0
[52242.014757] iget5_locked+0xba/0x110
[52242.014906] btrfs_iget+0x43/0xe0
[52242.015047] create_reloc_inode+0x19d/0x370
[52242.015221] btrfs_relocate_block_group+0x1b7/0x410
[52242.015416] btrfs_relocate_chunk+0x4c/0x190
[52242.015590] btrfs_balance+0x8e7/0x11d0
[52242.015750] btrfs_ioctl+0x1d3d/0x2900
[52242.015908] __x64_sys_ioctl+0x8b/0xc0
[52242.016065] do_syscall_64+0x38/0x90
[52242.016220] entry_SYSCALL_64_after_hwframe+0x6e/0xd8
[52242.016419]
-> #1 (btrfs_trans_num_extwriters){++++}-{0:0}:
[52242.016670] join_transaction+0xdb/0x550
[52242.016834] start_transaction+0x24f/0x730
[52242.017003] btrfs_uuid_scan_kthread+0x2bc/0x3d0
[52242.017193] kthread+0xfc/0x130
[52242.017329] ret_from_fork+0x29/0x50
[52242.017479]
-> #0 (btrfs_trans_num_writers){++++}-{0:0}:
[52242.017718] __lock_acquire+0x1415/0x2190
[52242.017891] lock_acquire+0xc7/0x2b0
[52242.018042] join_transaction+0x1cd/0x550
[52242.018209] start_transaction+0x24f/0x730
[52242.018379] btrfs_commit_inode_delayed_inode+0x5f/0x120
[52242.018590] btrfs_evict_inode+0x273/0x3c0
[52242.018758] evict+0xcc/0x1d0
[52242.018888] inode_lru_isolate+0x14d/0x1e0
[52242.019056] __list_lru_walk_one+0xbe/0x1c0
[52242.019229] list_lru_walk_one+0x58/0x80
[52242.019394] prune_icache_sb+0x39/0x60
[52242.019552] super_cache_scan+0x161/0x1f0
[52242.019716] do_shrink_slab+0x163/0x340
[52242.019877] shrink_slab+0x1d7/0x2a0
[52242.020029] shrink_node+0x2eb/0x7b0
[52242.020183] balance_pgdat+0x344/0x780
[52242.020339] kswapd+0x205/0x410
[52242.020474] kthread+0xfc/0x130
[52242.020610] ret_from_fork+0x29/0x50
[52242.020759]
other info that might help us debug this:
[52242.021035] Chain exists of:
btrfs_trans_num_writers --> fs_reclaim --> sb_internal#2
[52242.021415] Possible unsafe locking scenario:
[52242.021624] CPU0 CPU1
[52242.021785] ---- ----
[52242.021949] rlock(sb_internal#2);
[52242.022077] lock(fs_reclaim);
[52242.022283] lock(sb_internal#2);
[52242.022493] rlock(btrfs_trans_num_writers);
[52242.022651]
*** DEADLOCK ***
[52242.022860] 4 locks held by kswapd0/47:
[52242.022999] #0: ffffffff85e62280 (fs_reclaim){+.+.}-{0:0}, at: balance_pgdat+0x492/0x780
[52242.023299] #1: ffffffff85e507d0 (shrinker_rwsem){++++}-{3:3}, at: shrink_slab+0x113/0x2a0
[52242.023592] #2: ffff8bcd435920e0 (&type->s_umount_key#45){++++}-{3:3}, at: super_cache_scan+0x38/0x1f0
[52242.023921] #3: ffff8bcd43592600 (sb_internal#2){++++}-{0:0}, at: btrfs_commit_inode_delayed_inode+0x5f/0x120
[52242.024277]
stack backtrace:
[52242.024436] CPU: 1 PID: 47 Comm: kswapd0 Not tainted 6.5.0-rc1+ #1238
[52242.024665] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.13.0-2.fc32 04/01/2014
[52242.024965] Call Trace:
[52242.025059]
[52242.025148] dump_stack_lvl+0x58/0x90
[52242.025286] check_noncircular+0x101/0x110
[52242.025439] __lock_acquire+0x1415/0x2190
[52242.025585] lock_acquire+0xc7/0x2b0
[52242.025718] ? join_transaction+0x19f/0x550
[52242.025870] ? lock_release+0x134/0x270
[52242.026014] join_transaction+0x1cd/0x550
[52242.026224] ? join_transaction+0x19f/0x550
[52242.026411] start_transaction+0x24f/0x730
[52242.026594] btrfs_commit_inode_delayed_inode+0x5f/0x120
[52242.026921] btrfs_evict_inode+0x273/0x3c0
[52242.027129] ? lock_release+0x134/0x270
[52242.027321] ? __pfx_wake_bit_function+0x10/0x10
[52242.027536] evict+0xcc/0x1d0
[52242.027800] inode_lru_isolate+0x14d/0x1e0
[52242.028121] __list_lru_walk_one+0xbe/0x1c0
[52242.028377] ? __pfx_inode_lru_isolate+0x10/0x10
[52242.028584] ? __pfx_inode_lru_isolate+0x10/0x10
[52242.028773] list_lru_walk_one+0x58/0x80
[52242.028970] prune_icache_sb+0x39/0x60
[52242.029112] super_cache_scan+0x161/0x1f0
[52242.029324] do_shrink_slab+0x163/0x340
[52242.029491] shrink_slab+0x1d7/0x2a0
[52242.029647] shrink_node+0x2eb/0x7b0
[52242.029867] balance_pgdat+0x344/0x780
[52242.030165] kswapd+0x205/0x410
[52242.030435] ? __pfx_autoremove_wake_function+0x10/0x10
[52242.030750] ? __pfx_kswapd+0x10/0x10
[52242.030958] kthread+0xfc/0x130
[52242.031212] ? __pfx_kthread+0x10/0x10
[52242.031364] ret_from_fork+0x29/0x50
[52242.031500]
[52654.039779] BTRFS warning (device dm-9): failed to trim 3 block group(s), last error -512
[52657.817592] BTRFS: device fsid 06df285a-d975-45af-b618-9ff25b378d13 devid 1 transid 181 /dev/mapper/vg0-lv9 scanned by mount (3786793)
[52657.819066] BTRFS info (device dm-9): using crc32c (crc32c-intel) checksum algorithm
[52657.819361] BTRFS info (device dm-9): turning on sync discard
[52657.819594] BTRFS info (device dm-9): using free space tree