[50932.564293] run fstests generic/251 at 2023-07-19 11:07:10
[50933.078791] BTRFS: device fsid ec3e1159-917e-46d6-82d2-6d36aac552b0 devid 1 transid 2347475 /dev/mapper/vg0-lv0 scanned by mount (3760436)
[50933.079479] BTRFS info (device dm-0): using crc32c (crc32c-intel) checksum algorithm
[50933.079486] BTRFS info (device dm-0): using free space tree
[50933.083808] BTRFS info (device dm-0): auto enabling async discard
[50933.309303] BTRFS: device fsid 83a291ac-a47c-4c26-873d-d929f8d216b1 devid 1 transid 6 /dev/mapper/vg0-lv9 scanned by mkfs.btrfs (3760484)
[50933.336138] BTRFS info (device dm-9): using crc32c (crc32c-intel) checksum algorithm
[50933.336147] BTRFS info (device dm-9): turning on sync discard
[50933.336150] BTRFS info (device dm-9): enabling free space tree
[50933.336152] BTRFS info (device dm-9): using free space tree
[50933.339889] BTRFS info (device dm-9): creating free space tree
[50933.341304] BTRFS info (device dm-9): setting compat-ro feature flag for FREE_SPACE_TREE (0x1)
[50933.341311] BTRFS info (device dm-9): setting compat-ro feature flag for FREE_SPACE_TREE_VALID (0x2)
[50933.349640] BTRFS info (device dm-9): cleaning free space cache v1
[50933.357704] BTRFS info (device dm-9): checking UUID tree
[51127.073783] ======================================================
[51127.074004] WARNING: possible circular locking dependency detected
[51127.074225] 6.5.0-rc2+ #1244 Not tainted
[51127.074368] ------------------------------------------------------
[51127.074588] kswapd0/47 is trying to acquire lock:
[51127.074763] ffff9b00d6e8e378 (btrfs_trans_num_writers){++++}-{0:0}, at: join_transaction+0x19f/0x550
[51127.075106]
but task is already holding lock:
[51127.075313] ffff9b012b309600 (sb_internal#2){++++}-{0:0}, at: btrfs_commit_inode_delayed_inode+0x5f/0x120
[51127.075657]
which lock already depends on the new lock.
[51127.075947]
the existing dependency chain (in reverse order) is:
[51127.076209]
-> #3 (sb_internal#2){++++}-{0:0}:
[51127.076423] start_transaction+0x401/0x730
[51127.076593] btrfs_commit_inode_delayed_inode+0x5f/0x120
[51127.076808] btrfs_evict_inode+0x273/0x3c0
[51127.076979] evict+0xcc/0x1d0
[51127.077114] inode_lru_isolate+0x14d/0x1e0
[51127.077281] __list_lru_walk_one+0xbe/0x1c0
[51127.077458] list_lru_walk_one+0x58/0x80
[51127.077620] prune_icache_sb+0x39/0x60
[51127.077781] super_cache_scan+0x161/0x1f0
[51127.077949] do_shrink_slab+0x163/0x340
[51127.078109] shrink_slab+0x1d7/0x2a0
[51127.078259] shrink_node+0x2eb/0x7b0
[51127.078408] balance_pgdat+0x344/0x780
[51127.078567] kswapd+0x205/0x410
[51127.079174] kthread+0xfc/0x130
[51127.079424] ret_from_fork+0x2d/0x50
[51127.079642] ret_from_fork_asm+0x1b/0x30
[51127.079886]
-> #2 (fs_reclaim){+.+.}-{0:0}:
[51127.080178] fs_reclaim_acquire+0xa5/0xe0
[51127.080420] kmem_cache_alloc_lru+0x4e/0x570
[51127.080675] btrfs_alloc_inode+0x2d/0x250
[51127.080917] alloc_inode+0x1a/0xc0
[51127.081123] iget5_locked+0xba/0x110
[51127.081338] btrfs_iget+0x43/0xe0
[51127.081540] create_reloc_inode+0x19d/0x370
[51127.081788] btrfs_relocate_block_group+0x1b7/0x410
[51127.082063] btrfs_relocate_chunk+0x4c/0x190
[51127.082318] btrfs_balance+0x8e7/0x11d0
[51127.082548] btrfs_ioctl+0x1d3d/0x2900
[51127.082781] __x64_sys_ioctl+0x8b/0xc0
[51127.083008] do_syscall_64+0x38/0x90
[51127.083231] entry_SYSCALL_64_after_hwframe+0x6e/0xd8
[51127.083521]
-> #1 (btrfs_trans_num_extwriters){++++}-{0:0}:
[51127.083881] join_transaction+0xdb/0x550
[51127.084113] start_transaction+0x24f/0x730
[51127.084354] btrfs_uuid_scan_kthread+0x2bc/0x3d0
[51127.084616] kthread+0xfc/0x130
[51127.084813] ret_from_fork+0x2d/0x50
[51127.085027] ret_from_fork_asm+0x1b/0x30
[51127.085260]
-> #0 (btrfs_trans_num_writers){++++}-{0:0}:
[51127.085603] __lock_acquire+0x1415/0x2190
[51127.085861] lock_acquire+0xc7/0x2b0
[51127.086008] join_transaction+0x1cd/0x550
[51127.086166] start_transaction+0x24f/0x730
[51127.086335] btrfs_commit_inode_delayed_inode+0x5f/0x120
[51127.086555] btrfs_evict_inode+0x273/0x3c0
[51127.086724] evict+0xcc/0x1d0
[51127.086849] inode_lru_isolate+0x14d/0x1e0
[51127.087009] __list_lru_walk_one+0xbe/0x1c0
[51127.087172] list_lru_walk_one+0x58/0x80
[51127.087326] prune_icache_sb+0x39/0x60
[51127.087476] super_cache_scan+0x161/0x1f0
[51127.087634] do_shrink_slab+0x163/0x340
[51127.087793] shrink_slab+0x1d7/0x2a0
[51127.087935] shrink_node+0x2eb/0x7b0
[51127.088078] balance_pgdat+0x344/0x780
[51127.088228] kswapd+0x205/0x410
[51127.088356] kthread+0xfc/0x130
[51127.088486] ret_from_fork+0x2d/0x50
[51127.088627] ret_from_fork_asm+0x1b/0x30
[51127.088789]
other info that might help us debug this:
[51127.089055] Chain exists of:
btrfs_trans_num_writers --> fs_reclaim --> sb_internal#2
[51127.089432] Possible unsafe locking scenario:
[51127.089633] CPU0 CPU1
[51127.089796] ---- ----
[51127.089952] rlock(sb_internal#2);
[51127.090088] lock(fs_reclaim);
[51127.090284] lock(sb_internal#2);
[51127.090487] rlock(btrfs_trans_num_writers);
[51127.090640]
*** DEADLOCK ***
[51127.090864] 4 locks held by kswapd0/47:
[51127.090999] #0: ffffffff91e62280 (fs_reclaim){+.+.}-{0:0}, at: balance_pgdat+0x492/0x780
[51127.091293] #1: ffffffff91e507d0 (shrinker_rwsem){++++}-{3:3}, at: shrink_slab+0x113/0x2a0
[51127.091579] #2: ffff9b012b3090e0 (&type->s_umount_key#45){++++}-{3:3}, at: super_cache_scan+0x38/0x1f0
[51127.091909] #3: ffff9b012b309600 (sb_internal#2){++++}-{0:0}, at: btrfs_commit_inode_delayed_inode+0x5f/0x120
[51127.092248]
stack backtrace:
[51127.092401] CPU: 0 PID: 47 Comm: kswapd0 Not tainted 6.5.0-rc2+ #1244
[51127.092621] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.13.0-2.fc32 04/01/2014
[51127.092911] Call Trace:
[51127.093003]
[51127.093101] dump_stack_lvl+0x58/0x90
[51127.093234] check_noncircular+0x101/0x110
[51127.093481] __lock_acquire+0x1415/0x2190
[51127.093695] lock_acquire+0xc7/0x2b0
[51127.093862] ? join_transaction+0x19f/0x550
[51127.094046] ? lock_release+0x134/0x270
[51127.094188] join_transaction+0x1cd/0x550
[51127.094337] ? join_transaction+0x19f/0x550
[51127.094493] start_transaction+0x24f/0x730
[51127.094667] btrfs_commit_inode_delayed_inode+0x5f/0x120
[51127.094874] btrfs_evict_inode+0x273/0x3c0
[51127.095028] ? lock_release+0x134/0x270
[51127.095168] ? __pfx_wake_bit_function+0x10/0x10
[51127.095340] evict+0xcc/0x1d0
[51127.095453] inode_lru_isolate+0x14d/0x1e0
[51127.095604] __list_lru_walk_one+0xbe/0x1c0
[51127.095767] ? __pfx_inode_lru_isolate+0x10/0x10
[51127.095938] ? __pfx_inode_lru_isolate+0x10/0x10
[51127.096110] list_lru_walk_one+0x58/0x80
[51127.096254] prune_icache_sb+0x39/0x60
[51127.096393] super_cache_scan+0x161/0x1f0
[51127.096541] do_shrink_slab+0x163/0x340
[51127.096691] ? lock_is_held_type+0xe2/0x140
[51127.096857] shrink_slab+0x1d7/0x2a0
[51127.096992] shrink_node+0x2eb/0x7b0
[51127.097128] balance_pgdat+0x344/0x780
[51127.097269] kswapd+0x205/0x410
[51127.097390] ? __pfx_autoremove_wake_function+0x10/0x10
[51127.097577] ? __pfx_kswapd+0x10/0x10
[51127.097721] kthread+0xfc/0x130
[51127.097843] ? __pfx_kthread+0x10/0x10
[51127.097982] ret_from_fork+0x2d/0x50
[51127.098117] ? __pfx_kthread+0x10/0x10
[51127.098255] ret_from_fork_asm+0x1b/0x30
[51127.098400] RIP: 0000:0x0
[51127.098511] Code: Unable to access opcode bytes at 0xffffffffffffffd6.
[51127.098757] RSP: 0000:0000000000000000 EFLAGS: 00000000 ORIG_RAX: 0000000000000000
[51127.099025] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[51127.099279] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[51127.099532] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[51127.099794] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[51127.100047] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[51127.100302]
[51594.877388] BTRFS: device fsid 83a291ac-a47c-4c26-873d-d929f8d216b1 devid 1 transid 82 /dev/mapper/vg0-lv9 scanned by mount (3768263)
[51594.879251] BTRFS info (device dm-9): using crc32c (crc32c-intel) checksum algorithm
[51594.879701] BTRFS info (device dm-9): turning on sync discard
[51594.879921] BTRFS info (device dm-9): using free space tree