[12503.089374] run fstests generic/251 at 2023-10-18 00:21:41
[12503.792309] BTRFS: device fsid ec3e1159-917e-46d6-82d2-6d36aac552b0 devid 1 transid 2959184 /dev/mapper/vg0-lv0 scanned by mount (1605992)
[12503.793193] BTRFS info (device dm-0): using crc32c (crc32c-intel) checksum algorithm
[12503.793202] BTRFS info (device dm-0): using free space tree
[12503.799695] BTRFS info (device dm-0): auto enabling async discard
[12504.347151] BTRFS: device fsid 6c605ab1-556b-440b-bb52-dc9f2d9b835a devid 1 transid 6 /dev/mapper/vg0-lv9 scanned by mount (1606050)
[12504.348096] BTRFS info (device dm-9): using crc32c (crc32c-intel) checksum algorithm
[12504.348105] BTRFS info (device dm-9): turning on async discard
[12504.348108] BTRFS info (device dm-9): disk space caching is enabled
[12504.353885] BTRFS info (device dm-9): checking UUID tree
[13403.384595] ======================================================
[13403.384827] WARNING: possible circular locking dependency detected
[13403.385092] 6.6.0-rc5+ #1331 Not tainted
[13403.385243] ------------------------------------------------------
[13403.385477] kswapd0/50 is trying to acquire lock:
[13403.385655] ffff895cd7bfe390 (btrfs_trans_num_writers){++++}-{0:0}, at: join_transaction+0x1d0/0x580
[13403.387909]
but task is already holding lock:
[13403.388174] ffff895ce1cc5600 (sb_internal#2){++++}-{0:0}, at: evict_refill_and_join+0x7d/0xe0
[13403.388614]
which lock already depends on the new lock.
[13403.388928]
the existing dependency chain (in reverse order) is:
[13403.389212]
-> #3 (sb_internal#2){++++}-{0:0}:
[13403.389436] start_transaction+0x493/0xad0
[13403.389611] evict_refill_and_join+0x7d/0xe0
[13403.389792] btrfs_evict_inode+0x2ff/0x3c0
[13403.389965] evict+0xcc/0x1d0
[13403.390119] inode_lru_isolate+0x14d/0x1e0
[13403.390301] __list_lru_walk_one+0xbe/0x1c0
[13403.390487] list_lru_walk_one+0x58/0x80
[13403.390655] prune_icache_sb+0x39/0x60
[13403.390818] super_cache_scan+0x167/0x1f0
[13403.390994] do_shrink_slab+0x163/0x340
[13403.391175] shrink_slab+0x1d7/0x2a0
[13403.391330] shrink_node+0x2eb/0x7b0
[13403.391487] balance_pgdat+0x344/0x780
[13403.391649] kswapd+0x205/0x410
[13403.391789] kthread+0xff/0x130
[13403.392138] ret_from_fork+0x2d/0x50
[13403.392298] ret_from_fork_asm+0x1b/0x30
[13403.392472]
-> #2 (fs_reclaim){+.+.}-{0:0}:
[13403.392684] fs_reclaim_acquire+0xa2/0xe0
[13403.392860] kmem_cache_alloc_lru+0x4e/0x600
[13403.393049] btrfs_alloc_inode+0x2d/0x250
[13403.393220] alloc_inode+0x1a/0xc0
[13403.393369] iget5_locked+0xba/0x110
[13403.393525] btrfs_iget+0x43/0xe0
[13403.393671] create_reloc_inode+0x1a0/0x360
[13403.393855] btrfs_relocate_block_group+0x1d2/0x3d0
[13403.394057] btrfs_relocate_chunk+0x4c/0x1b0
[13403.394242] btrfs_balance+0x8e7/0x11d0
[13403.394408] btrfs_ioctl+0x1c25/0x2860
[13403.394570] __x64_sys_ioctl+0x8b/0xc0
[13403.394781] do_syscall_64+0x38/0x90
[13403.394942] entry_SYSCALL_64_after_hwframe+0x6e/0xd8
[13403.395160]
-> #1 (btrfs_trans_num_extwriters){++++}-{0:0}:
[13403.395422] join_transaction+0xaf/0x580
[13403.395591] start_transaction+0x1a0/0xad0
[13403.395764] btrfs_uuid_scan_kthread+0x2bc/0x3d0
[13403.395962] kthread+0xff/0x130
[13403.396109] ret_from_fork+0x2d/0x50
[13403.396267] ret_from_fork_asm+0x1b/0x30
[13403.396441]
-> #0 (btrfs_trans_num_writers){++++}-{0:0}:
[13403.396689] __lock_acquire+0x1415/0x2190
[13403.396869] lock_acquire+0xc7/0x2b0
[13403.397023] join_transaction+0x1e4/0x580
[13403.397225] start_transaction+0x1a0/0xad0
[13403.397401] evict_refill_and_join+0x7d/0xe0
[13403.397580] btrfs_evict_inode+0x2ff/0x3c0
[13403.397755] evict+0xcc/0x1d0
[13403.397890] inode_lru_isolate+0x14d/0x1e0
[13403.398073] __list_lru_walk_one+0xbe/0x1c0
[13403.398252] list_lru_walk_one+0x58/0x80
[13403.398420] prune_icache_sb+0x39/0x60
[13403.398583] super_cache_scan+0x167/0x1f0
[13403.398762] do_shrink_slab+0x163/0x340
[13403.398932] shrink_slab+0x1d7/0x2a0
[13403.399092] shrink_node+0x2eb/0x7b0
[13403.399248] balance_pgdat+0x344/0x780
[13403.399409] kswapd+0x205/0x410
[13403.399549] kthread+0xff/0x130
[13403.399690] ret_from_fork+0x2d/0x50
[13403.399846] ret_from_fork_asm+0x1b/0x30
[13403.400018]
other info that might help us debug this:
[13403.400315] Chain exists of:
btrfs_trans_num_writers --> fs_reclaim --> sb_internal#2
[13403.400706] Possible unsafe locking scenario:
[13403.400971] CPU0 CPU1
[13403.401147] ---- ----
[13403.401317] rlock(sb_internal#2);
[13403.401451] lock(fs_reclaim);
[13403.401660] lock(sb_internal#2);
[13403.401879] rlock(btrfs_trans_num_writers);
[13403.402047]
*** DEADLOCK ***
[13403.402264] 4 locks held by kswapd0/50:
[13403.402409] #0: ffffffff9fe62ea0 (fs_reclaim){+.+.}-{0:0}, at: balance_pgdat+0x3eb/0x780
[13403.402707] #1: ffffffff9fe513b0 (shrinker_rwsem){++++}-{3:3}, at: shrink_slab+0x113/0x2a0
[13403.403016] #2: ffff895ce1cc50e0 (&type->s_umount_key#45){++++}-{3:3}, at: super_cache_scan+0x38/0x1f0
[13403.403359] #3: ffff895ce1cc5600 (sb_internal#2){++++}-{0:0}, at: evict_refill_and_join+0x7d/0xe0
[13403.403685]
stack backtrace:
[13403.403850] CPU: 0 PID: 50 Comm: kswapd0 Not tainted 6.6.0-rc5+ #1331
[13403.404090] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.13.0-2.fc32 04/01/2014
[13403.404400] Call Trace:
[13403.404501]
[13403.404591] dump_stack_lvl+0x58/0x90
[13403.404744] check_noncircular+0x101/0x110
[13403.404902] __lock_acquire+0x1415/0x2190
[13403.405062] lock_acquire+0xc7/0x2b0
[13403.405201] ? join_transaction+0x1d0/0x580
[13403.405359] ? lock_release+0x134/0x270
[13403.405507] ? join_transaction+0x1d0/0x580
[13403.405664] ? join_transaction+0x3d/0x580
[13403.405824] join_transaction+0x1e4/0x580
[13403.405979] ? join_transaction+0x1d0/0x580
[13403.406224] start_transaction+0x1a0/0xad0
[13403.406382] evict_refill_and_join+0x7d/0xe0
[13403.406549] btrfs_evict_inode+0x2ff/0x3c0
[13403.406736] evict+0xcc/0x1d0
[13403.406855] inode_lru_isolate+0x14d/0x1e0
[13403.407010] __list_lru_walk_one+0xbe/0x1c0
[13403.407175] ? __pfx_inode_lru_isolate+0x10/0x10
[13403.407350] ? __pfx_inode_lru_isolate+0x10/0x10
[13403.407524] list_lru_walk_one+0x58/0x80
[13403.407674] prune_icache_sb+0x39/0x60
[13403.407818] super_cache_scan+0x167/0x1f0
[13403.407972] do_shrink_slab+0x163/0x340
[13403.408123] ? lock_is_held_type+0xe2/0x140
[13403.408293] shrink_slab+0x1d7/0x2a0
[13403.408432] shrink_node+0x2eb/0x7b0
[13403.408572] balance_pgdat+0x344/0x780
[13403.408719] kswapd+0x205/0x410
[13403.408843] ? __pfx_autoremove_wake_function+0x10/0x10
[13403.409038] ? __pfx_kswapd+0x10/0x10
[13403.409184] kthread+0xff/0x130
[13403.409309] ? __pfx_kthread+0x10/0x10
[13403.409453] ret_from_fork+0x2d/0x50
[13403.409591] ? __pfx_kthread+0x10/0x10
[13403.409735] ret_from_fork_asm+0x1b/0x30
[13403.409887]
[13604.486555] BTRFS: device fsid 6c605ab1-556b-440b-bb52-dc9f2d9b835a devid 1 transid 123 /dev/mapper/vg0-lv9 scanned by mount (1616760)
[13604.487460] BTRFS info (device dm-9): using crc32c (crc32c-intel) checksum algorithm
[13604.487813] BTRFS info (device dm-9): turning on async discard
[13604.488062] BTRFS info (device dm-9): disk space caching is enabled