[12168.694845] run fstests generic/251 at 2023-10-13 00:15:03
[12169.159383] BTRFS: device fsid 442e5b9d-ccad-458f-8dc7-acd1904d321e devid 1 transid 1667833 /dev/mapper/vg0-lv0 scanned by mount (1571261)
[12169.160637] BTRFS info (device dm-0): using crc32c (crc32c-intel) checksum algorithm
[12169.160647] BTRFS info (device dm-0): using free space tree
[12169.167281] BTRFS info (device dm-0): auto enabling async discard
[12169.891678] BTRFS: device fsid b899f911-9889-4272-9224-11b35fca8064 devid 1 transid 6 /dev/mapper/vg0-lv7 scanned by mount (1571320)
[12169.892843] BTRFS info (device dm-7): using crc32c (crc32c-intel) checksum algorithm
[12169.892851] BTRFS info (device dm-7): using free space tree
[12169.898460] BTRFS info (device dm-7): auto enabling async discard
[12169.898592] BTRFS info (device dm-7): checking UUID tree
[12695.373468] ======================================================
[12695.373653] WARNING: possible circular locking dependency detected
[12695.373838] 6.6.0-rc5+ #1326 Not tainted
[12695.373980] ------------------------------------------------------
[12695.374158] kswapd0/50 is trying to acquire lock:
[12695.374311] ffff9f1fee62e390 (btrfs_trans_num_writers){++++}-{0:0}, at: join_transaction+0x1d0/0x580
[12695.374611]
but task is already holding lock:
[12695.374843] ffff9f1ff059b600 (sb_internal){++++}-{0:0}, at: btrfs_commit_inode_delayed_inode+0x5f/0x120
[12695.375124]
which lock already depends on the new lock.
[12695.375409]
the existing dependency chain (in reverse order) is:
[12695.375644]
-> #3 (sb_internal){++++}-{0:0}:
[12695.375855] start_transaction+0x493/0xad0
[12695.376012] btrfs_commit_inode_delayed_inode+0x5f/0x120
[12695.376188] btrfs_evict_inode+0x273/0x3c0
[12695.376341] evict+0xcc/0x1d0
[12695.376487] inode_lru_isolate+0x14d/0x1e0
[12695.376643] __list_lru_walk_one+0xbe/0x1c0
[12695.376814] list_lru_walk_one+0x58/0x80
[12695.376965] prune_icache_sb+0x39/0x60
[12695.377114] super_cache_scan+0x167/0x1f0
[12695.377272] do_shrink_slab+0x163/0x340
[12695.377429] shrink_slab+0x1d7/0x2a0
[12695.377573] shrink_node+0x2eb/0x7b0
[12695.377723] balance_pgdat+0x344/0x780
[12695.377873] kswapd+0x205/0x410
[12695.378013] kthread+0xff/0x130
[12695.378163] ret_from_fork+0x2d/0x50
[12695.378318] ret_from_fork_asm+0x1b/0x30
[12695.378477]
-> #2 (fs_reclaim){+.+.}-{0:0}:
[12695.378717] fs_reclaim_acquire+0xa2/0xe0
[12695.378878] kmem_cache_alloc_lru+0x4e/0x600
[12695.379037] btrfs_alloc_inode+0x2d/0x250
[12695.379189] alloc_inode+0x1a/0xc0
[12695.379330] iget5_locked+0xba/0x110
[12695.379478] btrfs_iget+0x43/0xe0
[12695.379623] create_reloc_inode+0x1a0/0x360
[12695.379782] btrfs_relocate_block_group+0x1d2/0x3d0
[12695.379949] btrfs_relocate_chunk+0x4c/0x1b0
[12695.380107] btrfs_balance+0x8e7/0x11d0
[12695.380276] btrfs_ioctl+0x1c25/0x2860
[12695.380422] __x64_sys_ioctl+0x8b/0xc0
[12695.380572] do_syscall_64+0x38/0x90
[12695.380741] entry_SYSCALL_64_after_hwframe+0x6e/0xd8
[12695.380925]
-> #1 (btrfs_trans_num_extwriters){++++}-{0:0}:
[12695.381149] join_transaction+0xaf/0x580
[12695.381304] start_transaction+0x1a0/0xad0
[12695.381458] btrfs_dirty_inode+0x40/0xd0
[12695.381608] touch_atime+0x133/0x220
[12695.381758] filemap_read+0x2f0/0x300
[12695.381909] __kernel_read+0xef/0x2a0
[12695.382061] bprm_execve+0x2b0/0x870
[12695.382204] do_execveat_common+0x1b5/0x260
[12695.382359] __x64_sys_execve+0x39/0x50
[12695.382508] do_syscall_64+0x38/0x90
[12695.382658] entry_SYSCALL_64_after_hwframe+0x6e/0xd8
[12695.382830]
-> #0 (btrfs_trans_num_writers){++++}-{0:0}:
[12695.383056] __lock_acquire+0x1415/0x2190
[12695.383216] lock_acquire+0xc7/0x2b0
[12695.383360] join_transaction+0x1e4/0x580
[12695.383512] start_transaction+0x1a0/0xad0
[12695.383666] btrfs_commit_inode_delayed_inode+0x5f/0x120
[12695.383848] btrfs_evict_inode+0x273/0x3c0
[12695.384002] evict+0xcc/0x1d0
[12695.384137] inode_lru_isolate+0x14d/0x1e0
[12695.384293] __list_lru_walk_one+0xbe/0x1c0
[12695.384532] list_lru_walk_one+0x58/0x80
[12695.384684] prune_icache_sb+0x39/0x60
[12695.384839] super_cache_scan+0x167/0x1f0
[12695.384992] do_shrink_slab+0x163/0x340
[12695.385145] shrink_slab+0x1d7/0x2a0
[12695.385288] shrink_node+0x2eb/0x7b0
[12695.385432] balance_pgdat+0x344/0x780
[12695.385583] kswapd+0x205/0x410
[12695.385726] kthread+0xff/0x130
[12695.385863] ret_from_fork+0x2d/0x50
[12695.386006] ret_from_fork_asm+0x1b/0x30
[12695.386161]
other info that might help us debug this:
[12695.386440] Chain exists of:
btrfs_trans_num_writers --> fs_reclaim --> sb_internal
[12695.386764] Possible unsafe locking scenario:
[12695.386972] CPU0 CPU1
[12695.387125] ---- ----
[12695.387278] rlock(sb_internal);
[12695.387409] lock(fs_reclaim);
[12695.387577] lock(sb_internal);
[12695.387754] rlock(btrfs_trans_num_writers);
[12695.387904]
*** DEADLOCK ***
[12695.388146] 4 locks held by kswapd0/50:
[12695.388286] #0: fffffffface62ea0 (fs_reclaim){+.+.}-{0:0}, at: balance_pgdat+0x3eb/0x780
[12695.388619] #1: fffffffface513b0 (shrinker_rwsem){++++}-{3:3}, at: shrink_slab+0x113/0x2a0
[12695.388879] #2: ffff9f1ff059b0e0 (&type->s_umount_key#35){++++}-{3:3}, at: super_cache_scan+0x38/0x1f0
[12695.389155] #3: ffff9f1ff059b600 (sb_internal){++++}-{0:0}, at: btrfs_commit_inode_delayed_inode+0x5f/0x120
[12695.389432]
stack backtrace:
[12695.389618] CPU: 0 PID: 50 Comm: kswapd0 Not tainted 6.6.0-rc5+ #1326
[12695.389805] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.13.0-2.fc32 04/01/2014
[12695.390058] Call Trace:
[12695.390178]
[12695.390291] dump_stack_lvl+0x58/0x90
[12695.390436] check_noncircular+0x101/0x110
[12695.390586] __lock_acquire+0x1415/0x2190
[12695.390736] lock_acquire+0xc7/0x2b0
[12695.390873] ? join_transaction+0x1d0/0x580
[12695.391132] ? lock_release+0x134/0x270
[12695.391273] ? join_transaction+0x1d0/0x580
[12695.391418] ? join_transaction+0x3d/0x580
[12695.391567] join_transaction+0x1e4/0x580
[12695.391722] ? join_transaction+0x1d0/0x580
[12695.391870] start_transaction+0x1a0/0xad0
[12695.392015] btrfs_commit_inode_delayed_inode+0x5f/0x120
[12695.392185] btrfs_evict_inode+0x273/0x3c0
[12695.392404] ? lock_release+0x134/0x270
[12695.392544] ? __pfx_wake_bit_function+0x10/0x10
[12695.392709] evict+0xcc/0x1d0
[12695.392841] inode_lru_isolate+0x14d/0x1e0
[12695.392990] __list_lru_walk_one+0xbe/0x1c0
[12695.393139] ? __pfx_inode_lru_isolate+0x10/0x10
[12695.393292] ? __pfx_inode_lru_isolate+0x10/0x10
[12695.393615] list_lru_walk_one+0x58/0x80
[12695.393812] prune_icache_sb+0x39/0x60
[12695.393953] super_cache_scan+0x167/0x1f0
[12695.394098] do_shrink_slab+0x163/0x340
[12695.394243] ? lock_is_held_type+0xe2/0x140
[12695.394399] shrink_slab+0x1d7/0x2a0
[12695.394537] shrink_node+0x2eb/0x7b0
[12695.394754] balance_pgdat+0x344/0x780
[12695.394902] kswapd+0x205/0x410
[12695.395031] ? __pfx_autoremove_wake_function+0x10/0x10
[12695.395199] ? __pfx_kswapd+0x10/0x10
[12695.395342] kthread+0xff/0x130
[12695.395473] ? __pfx_kthread+0x10/0x10
[12695.395634] ret_from_fork+0x2d/0x50
[12695.395780] ? __pfx_kthread+0x10/0x10
[12695.395922] ret_from_fork_asm+0x1b/0x30
[12695.396068]
[13034.355487] BTRFS warning (device dm-7): failed to trim 11 block group(s), last error -512
[13050.520268] BTRFS: device fsid b899f911-9889-4272-9224-11b35fca8064 devid 1 transid 77 /dev/mapper/vg0-lv7 scanned by mount (1580420)
[13050.520980] BTRFS info (device dm-7): using crc32c (crc32c-intel) checksum algorithm
[13050.521254] BTRFS info (device dm-7): using free space tree
[13050.524250] BTRFS info (device dm-7): auto enabling async discard