[54552.734969] run fstests generic/251 at 2023-08-01 12:04:22
[54553.175959] BTRFS: device fsid ec3e1159-917e-46d6-82d2-6d36aac552b0 devid 1 transid 2450465 /dev/mapper/vg0-lv0 scanned by mount (3754245)
[54553.177054] BTRFS info (device dm-0): using crc32c (crc32c-intel) checksum algorithm
[54553.177061] BTRFS info (device dm-0): using free space tree
[54553.181165] BTRFS info (device dm-0): auto enabling async discard
[54553.373938] BTRFS: device fsid 6d35f8c0-2c4c-4f5b-8c05-5e9334373997 devid 1 transid 6 /dev/mapper/vg0-lv9 scanned by mkfs.btrfs (3754293)
[54553.391072] BTRFS info: devid 1 device path /dev/mapper/vg0-lv9 changed to /dev/dm-9 scanned by systemd-udevd (3753163)
[54553.391921] BTRFS info (device dm-9): using crc32c (crc32c-intel) checksum algorithm
[54553.391929] BTRFS info (device dm-9): turning on sync discard
[54553.391932] BTRFS info (device dm-9): enabling free space tree
[54553.391934] BTRFS info (device dm-9): using free space tree
[54553.392211] BTRFS info: devid 1 device path /dev/dm-9 changed to /dev/mapper/vg0-lv9 scanned by systemd-udevd (3753163)
[54553.395045] BTRFS info (device dm-9): creating free space tree
[54553.395667] BTRFS info (device dm-9): setting compat-ro feature flag for FREE_SPACE_TREE (0x1)
[54553.395671] BTRFS info (device dm-9): setting compat-ro feature flag for FREE_SPACE_TREE_VALID (0x2)
[54553.403233] BTRFS info (device dm-9): cleaning free space cache v1
[54553.410963] BTRFS info (device dm-9): checking UUID tree
[54824.010967] ======================================================
[54824.011199] WARNING: possible circular locking dependency detected
[54824.011426] 6.5.0-rc3+ #1257 Not tainted
[54824.011574] ------------------------------------------------------
[54824.011831] kswapd0/47 is trying to acquire lock:
[54824.012006] ffff8c9450602378 (btrfs_trans_num_writers){++++}-{0:0}, at: join_transaction+0x1af/0x590
[54824.012350]
but task is already holding lock:
[54824.012565] ffff8c944431c600 (sb_internal#2){++++}-{0:0}, at: btrfs_commit_inode_delayed_inode+0x5f/0x120
[54824.012915]
which lock already depends on the new lock.
[54824.013214]
the existing dependency chain (in reverse order) is:
[54824.013486]
-> #3 (sb_internal#2){++++}-{0:0}:
[54824.013705] start_transaction+0x3f9/0x740
[54824.013881] btrfs_commit_inode_delayed_inode+0x5f/0x120
[54824.014097] btrfs_evict_inode+0x273/0x3c0
[54824.014275] evict+0xcc/0x1d0
[54824.014410] inode_lru_isolate+0x14d/0x1e0
[54824.014584] __list_lru_walk_one+0xbe/0x1c0
[54824.014763] list_lru_walk_one+0x58/0x80
[54824.014933] prune_icache_sb+0x39/0x60
[54824.015096] super_cache_scan+0x161/0x1f0
[54824.015270] do_shrink_slab+0x163/0x340
[54824.015438] shrink_slab+0x1d7/0x2a0
[54824.015592] shrink_node+0x2eb/0x7b0
[54824.015748] balance_pgdat+0x344/0x780
[54824.015910] kswapd+0x205/0x410
[54824.016052] kthread+0xfc/0x130
[54824.016198] ret_from_fork+0x2d/0x50
[54824.016354] ret_from_fork_asm+0x1b/0x30
[54824.016524]
-> #2 (fs_reclaim){+.+.}-{0:0}:
[54824.016736] fs_reclaim_acquire+0xa5/0xe0
[54824.016906] kmem_cache_alloc_lru+0x4e/0x570
[54824.017087] btrfs_alloc_inode+0x2d/0x250
[54824.017264] alloc_inode+0x1a/0xc0
[54824.017412] iget5_locked+0xba/0x110
[54824.017566] btrfs_iget+0x43/0xe0
[54824.017711] create_reloc_inode+0x19d/0x370
[54824.017889] btrfs_relocate_block_group+0x1b7/0x410
[54824.018090] btrfs_relocate_chunk+0x4c/0x1b0
[54824.018273] btrfs_balance+0x8e7/0x11d0
[54824.018437] btrfs_ioctl+0x1d3d/0x2900
[54824.018600] __x64_sys_ioctl+0x8b/0xc0
[54824.018762] do_syscall_64+0x38/0x90
[54824.018920] entry_SYSCALL_64_after_hwframe+0x6e/0xd8
[54824.019127]
-> #1 (btrfs_trans_num_extwriters){++++}-{0:0}:
[54824.019389] join_transaction+0xb4/0x590
[54824.019557] start_transaction+0x187/0x740
[54824.019730] btrfs_uuid_scan_kthread+0x2bc/0x3d0
[54824.019922] kthread+0xfc/0x130
[54824.020063] ret_from_fork+0x2d/0x50
[54824.020221] ret_from_fork_asm+0x1b/0x30
[54824.020392]
-> #0 (btrfs_trans_num_writers){++++}-{0:0}:
[54824.020641] __lock_acquire+0x1415/0x2190
[54824.020814] lock_acquire+0xc7/0x2b0
[54824.020967] join_transaction+0x1de/0x590
[54824.021142] start_transaction+0x187/0x740
[54824.021317] btrfs_commit_inode_delayed_inode+0x5f/0x120
[54824.021532] btrfs_evict_inode+0x273/0x3c0
[54824.021706] evict+0xcc/0x1d0
[54824.021839] inode_lru_isolate+0x14d/0x1e0
[54824.022014] __list_lru_walk_one+0xbe/0x1c0
[54824.022195] list_lru_walk_one+0x58/0x80
[54824.022363] prune_icache_sb+0x39/0x60
[54824.022525] super_cache_scan+0x161/0x1f0
[54824.022698] do_shrink_slab+0x163/0x340
[54824.022865] shrink_slab+0x1d7/0x2a0
[54824.023021] shrink_node+0x2eb/0x7b0
[54824.023178] balance_pgdat+0x344/0x780
[54824.023340] kswapd+0x205/0x410
[54824.023479] kthread+0xfc/0x130
[54824.023619] ret_from_fork+0x2d/0x50
[54824.023773] ret_from_fork_asm+0x1b/0x30
[54824.023941]
other info that might help us debug this:
[54824.024233] Chain exists of:
btrfs_trans_num_writers --> fs_reclaim --> sb_internal#2
[54824.024623] Possible unsafe locking scenario:
[54824.024840] CPU0 CPU1
[54824.025010] ---- ----
[54824.025181] rlock(sb_internal#2);
[54824.025315] lock(fs_reclaim);
[54824.025527] lock(sb_internal#2);
[54824.025746] rlock(btrfs_trans_num_writers);
[54824.025911]
*** DEADLOCK ***
[54824.026135] 4 locks held by kswapd0/47:
[54824.026305] #0: ffffffff95e62280 (fs_reclaim){+.+.}-{0:0}, at: balance_pgdat+0x492/0x780
[54824.026604] #1: ffffffff95e507d0 (shrinker_rwsem){++++}-{3:3}, at: shrink_slab+0x113/0x2a0
[54824.026908] #2: ffff8c944431c0e0 (&type->s_umount_key#45){++++}-{3:3}, at: super_cache_scan+0x38/0x1f0
[54824.027251] #3: ffff8c944431c600 (sb_internal#2){++++}-{0:0}, at: btrfs_commit_inode_delayed_inode+0x5f/0x120
[54824.027615]
stack backtrace:
[54824.027781] CPU: 0 PID: 47 Comm: kswapd0 Not tainted 6.5.0-rc3+ #1257
[54824.028017] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.13.0-2.fc32 04/01/2014
[54824.028328] Call Trace:
[54824.028425]
[54824.028512] dump_stack_lvl+0x58/0x90
[54824.028655] check_noncircular+0x101/0x110
[54824.028809] __lock_acquire+0x1415/0x2190
[54824.028962] lock_acquire+0xc7/0x2b0
[54824.029098] ? join_transaction+0x1af/0x590
[54824.029260] ? lock_release+0x134/0x270
[54824.029405] join_transaction+0x1de/0x590
[54824.029555] ? join_transaction+0x1af/0x590
[54824.029713] start_transaction+0x187/0x740
[54824.029868] btrfs_commit_inode_delayed_inode+0x5f/0x120
[54824.030066] btrfs_evict_inode+0x273/0x3c0
[54824.030224] ? lock_release+0x134/0x270
[54824.030369] ? __pfx_wake_bit_function+0x10/0x10
[54824.030543] evict+0xcc/0x1d0
[54824.030659] inode_lru_isolate+0x14d/0x1e0
[54824.030815] __list_lru_walk_one+0xbe/0x1c0
[54824.030975] ? __pfx_inode_lru_isolate+0x10/0x10
[54824.031155] ? __pfx_inode_lru_isolate+0x10/0x10
[54824.031329] list_lru_walk_one+0x58/0x80
[54824.031480] prune_icache_sb+0x39/0x60
[54824.031624] super_cache_scan+0x161/0x1f0
[54824.031777] do_shrink_slab+0x163/0x340
[54824.031924] ? lock_is_held_type+0xe2/0x140
[54824.032081] shrink_slab+0x1d7/0x2a0
[54824.032279] shrink_node+0x2eb/0x7b0
[54824.032418] balance_pgdat+0x344/0x780
[54824.032567] kswapd+0x205/0x410
[54824.032690] ? __pfx_autoremove_wake_function+0x10/0x10
[54824.032884] ? __pfx_kswapd+0x10/0x10
[54824.033023] kthread+0xfc/0x130
[54824.033152] ? __pfx_kthread+0x10/0x10
[54824.033294] ret_from_fork+0x2d/0x50
[54824.033431] ? __pfx_kthread+0x10/0x10
[54824.033573] ret_from_fork_asm+0x1b/0x30
[54824.033725] RIP: 0000:0x0
[54824.033839] Code: Unable to access opcode bytes at 0xffffffffffffffd6.
[54824.034077] RSP: 0000:0000000000000000 EFLAGS: 00000000 ORIG_RAX: 0000000000000000
[54824.034355] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[54824.034614] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[54824.034874] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[54824.035134] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[54824.035394] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[54824.035655]
[55226.332725] BTRFS: device fsid 6d35f8c0-2c4c-4f5b-8c05-5e9334373997 devid 1 transid 176 /dev/mapper/vg0-lv9 scanned by mount (3769805)
[55226.333708] BTRFS info (device dm-9): using crc32c (crc32c-intel) checksum algorithm
[55226.334002] BTRFS info (device dm-9): turning on sync discard
[55226.334213] BTRFS info (device dm-9): using free space tree