[35155.867378] run fstests generic/251 at 2023-09-27 06:40:22
[35156.438486] BTRFS: device fsid 13921637-4436-40f4-9cb4-e48f1103a380 devid 1 transid 2503383 /dev/mapper/vg0-lv0 scanned by mount (855833)
[35156.439704] BTRFS info (device dm-0): using crc32c (crc32c-intel) checksum algorithm
[35156.439711] BTRFS info (device dm-0): using free space tree
[35156.444009] BTRFS info (device dm-0): auto enabling async discard
[35156.718927] BTRFS: device fsid 262a7876-e2ac-4dd5-a049-d152a59522d9 devid 1 transid 6 /dev/mapper/vg0-lv9 scanned by mount (855892)
[35156.719750] BTRFS info (device dm-9): using crc32c (crc32c-intel) checksum algorithm
[35156.719759] BTRFS info (device dm-9): setting incompat feature flag for COMPRESS_LZO (0x8)
[35156.719762] BTRFS info (device dm-9): use lzo compression, level 0
[35156.719765] BTRFS info (device dm-9): disk space caching is enabled
[35156.724322] BTRFS info (device dm-9): auto enabling async discard
[35156.724484] BTRFS info (device dm-9): checking UUID tree
[35361.918923] ======================================================
[35361.919269] WARNING: possible circular locking dependency detected
[35361.919618] 6.6.0-rc3+ #1314 Not tainted
[35361.919833] ------------------------------------------------------
[35361.920169] kswapd0/50 is trying to acquire lock:
[35361.920433] ffff9086071ce390 (btrfs_trans_num_writers){++++}-{0:0}, at: join_transaction+0x1d0/0x580
[35361.920931]
but task is already holding lock:
[35361.921251] ffff908662570600 (sb_internal#2){++++}-{0:0}, at: btrfs_commit_inode_delayed_inode+0x5f/0x120
[35361.921770]
which lock already depends on the new lock.
[35361.922218]
the existing dependency chain (in reverse order) is:
[35361.922629]
-> #3 (sb_internal#2){++++}-{0:0}:
[35361.922955] start_transaction+0x493/0xad0
[35361.923210] btrfs_commit_inode_delayed_inode+0x5f/0x120
[35361.923607] btrfs_evict_inode+0x273/0x3c0
[35361.923861] evict+0xcc/0x1d0
[35361.924056] inode_lru_isolate+0x14d/0x1e0
[35361.924321] __list_lru_walk_one+0xbe/0x1c0
[35361.924586] list_lru_walk_one+0x58/0x80
[35361.924831] prune_icache_sb+0x39/0x60
[35361.925069] super_cache_scan+0x167/0x1f0
[35361.925322] do_shrink_slab+0x163/0x340
[35361.925566] shrink_slab+0x1d7/0x2a0
[35361.925795] shrink_node+0x2eb/0x7b0
[35361.926021] balance_pgdat+0x344/0x780
[35361.926258] kswapd+0x205/0x410
[35361.926516] kthread+0xff/0x130
[35361.926733] ret_from_fork+0x2d/0x50
[35361.926958] ret_from_fork_asm+0x1b/0x30
[35361.927250]
-> #2 (fs_reclaim){+.+.}-{0:0}:
[35361.927566] fs_reclaim_acquire+0xa2/0xe0
[35361.927817] kmem_cache_alloc_lru+0x4e/0x600
[35361.928097] btrfs_alloc_inode+0x2d/0x250
[35361.928360] alloc_inode+0x1a/0xc0
[35361.928577] iget5_locked+0xba/0x110
[35361.928803] btrfs_iget+0x43/0xe0
[35361.929018] create_reloc_inode+0x1a0/0x370
[35361.929305] btrfs_relocate_block_group+0x1d2/0x3d0
[35361.929601] btrfs_relocate_chunk+0x4c/0x1b0
[35361.929864] btrfs_balance+0x8e7/0x11d0
[35361.930106] btrfs_ioctl+0x1bb4/0x28b0
[35361.930342] __x64_sys_ioctl+0x8b/0xc0
[35361.930588] do_syscall_64+0x38/0x90
[35361.930814] entry_SYSCALL_64_after_hwframe+0x6e/0xd8
[35361.931119]
-> #1 (btrfs_trans_num_extwriters){++++}-{0:0}:
[35361.931562] join_transaction+0xaf/0x580
[35361.931928] start_transaction+0x1a0/0xad0
[35361.932306] btrfs_uuid_scan_kthread+0x2bc/0x3d0
[35361.932725] kthread+0xff/0x130
[35361.933023] ret_from_fork+0x2d/0x50
[35361.933363] ret_from_fork_asm+0x1b/0x30
[35361.933727]
-> #0 (btrfs_trans_num_writers){++++}-{0:0}:
[35361.934277] __lock_acquire+0x1415/0x2190
[35361.934659] lock_acquire+0xc7/0x2b0
[35361.934999] join_transaction+0x1e4/0x580
[35361.935381] start_transaction+0x1a0/0xad0
[35361.935758] btrfs_commit_inode_delayed_inode+0x5f/0x120
[35361.936234] btrfs_evict_inode+0x273/0x3c0
[35361.936618] evict+0xcc/0x1d0
[35361.936906] inode_lru_isolate+0x14d/0x1e0
[35361.937287] __list_lru_walk_one+0xbe/0x1c0
[35361.937677] list_lru_walk_one+0x58/0x80
[35361.938042] prune_icache_sb+0x39/0x60
[35361.938404] super_cache_scan+0x167/0x1f0
[35361.938779] do_shrink_slab+0x163/0x340
[35361.939139] shrink_slab+0x1d7/0x2a0
[35361.939482] shrink_node+0x2eb/0x7b0
[35361.939817] balance_pgdat+0x344/0x780
[35361.940162] kswapd+0x205/0x410
[35361.940465] kthread+0xff/0x130
[35361.940764] ret_from_fork+0x2d/0x50
[35361.941102] ret_from_fork_asm+0x1b/0x30
[35361.941466]
other info that might help us debug this:
[35361.942100] Chain exists of:
btrfs_trans_num_writers --> fs_reclaim --> sb_internal#2
[35361.942966] Possible unsafe locking scenario:
[35361.943434] CPU0 CPU1
[35361.943796] ---- ----
[35361.944167] rlock(sb_internal#2);
[35361.944463] lock(fs_reclaim);
[35361.944917] lock(sb_internal#2);
[35361.945456] rlock(btrfs_trans_num_writers);
[35361.945809]
*** DEADLOCK ***
[35361.946288] 4 locks held by kswapd0/50:
[35361.946608] #0: ffffffff93e62e00 (fs_reclaim){+.+.}-{0:0}, at: balance_pgdat+0x3eb/0x780
[35361.947263] #1: ffffffff93e51310 (shrinker_rwsem){++++}-{3:3}, at: shrink_slab+0x113/0x2a0
[35361.947936] #2: ffff9086625700e0 (&type->s_umount_key#45){++++}-{3:3}, at: super_cache_scan+0x38/0x1f0
[35361.948690] #3: ffff908662570600 (sb_internal#2){++++}-{0:0}, at: btrfs_commit_inode_delayed_inode+0x5f/0x120
[35361.949500]
stack backtrace:
[35361.949856] CPU: 0 PID: 50 Comm: kswapd0 Not tainted 6.6.0-rc3+ #1314
[35361.950376] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.13.0-2.fc32 04/01/2014
[35361.951056] Call Trace:
[35361.951267]
[35361.951454] dump_stack_lvl+0x58/0x90
[35361.951752] check_noncircular+0x101/0x110
[35361.952097] __lock_acquire+0x1415/0x2190
[35361.952429] lock_acquire+0xc7/0x2b0
[35361.952727] ? join_transaction+0x1d0/0x580
[35361.953070] ? lock_release+0x134/0x270
[35361.953393] ? join_transaction+0x1d0/0x580
[35361.953732] ? join_transaction+0x3d/0x580
[35361.954070] join_transaction+0x1e4/0x580
[35361.954427] ? join_transaction+0x1d0/0x580
[35361.954772] start_transaction+0x1a0/0xad0
[35361.955116] btrfs_commit_inode_delayed_inode+0x5f/0x120
[35361.955563] btrfs_evict_inode+0x273/0x3c0
[35361.955914] ? lock_release+0x134/0x270
[35361.956234] ? __pfx_wake_bit_function+0x10/0x10
[35361.956633] evict+0xcc/0x1d0
[35361.956896] inode_lru_isolate+0x14d/0x1e0
[35361.957245] __list_lru_walk_one+0xbe/0x1c0
[35361.957601] ? __pfx_inode_lru_isolate+0x10/0x10
[35361.957981] ? __pfx_inode_lru_isolate+0x10/0x10
[35361.958303] list_lru_walk_one+0x58/0x80
[35361.958580] prune_icache_sb+0x39/0x60
[35361.958837] super_cache_scan+0x167/0x1f0
[35361.959117] do_shrink_slab+0x163/0x340
[35361.959374] shrink_slab+0x1d7/0x2a0
[35361.959616] shrink_node+0x2eb/0x7b0
[35361.959877] balance_pgdat+0x344/0x780
[35361.960125] kswapd+0x205/0x410
[35361.960331] ? __pfx_autoremove_wake_function+0x10/0x10
[35361.960636] ? __pfx_kswapd+0x10/0x10
[35361.960849] kthread+0xff/0x130
[35361.961035] ? __pfx_kthread+0x10/0x10
[35361.961262] ret_from_fork+0x2d/0x50
[35361.961475] ? __pfx_kthread+0x10/0x10
[35361.961688] ret_from_fork_asm+0x1b/0x30
[35361.961976]
[35808.194661] BTRFS: device fsid 262a7876-e2ac-4dd5-a049-d152a59522d9 devid 1 transid 91 /dev/mapper/vg0-lv9 scanned by mount (929682)
[35808.196720] BTRFS info (device dm-9): using crc32c (crc32c-intel) checksum algorithm
[35808.197161] BTRFS info (device dm-9): use lzo compression, level 0
[35808.197481] BTRFS info (device dm-9): disk space caching is enabled
[35808.201502] BTRFS info (device dm-9): auto enabling async discard