https://bugzilla.kernel.org/show_bug.cgi?id=201261 Bug ID: 201261 Summary: [xfstests shared/010]: WARNING: possible circular locking dependency detected Product: File System Version: 2.5 Kernel Version: v4.19-rc5 Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: low Priority: P1 Component: XFS Assignee: filesystem_xfs@xxxxxxxxxxxxxxxxxxxxxx Reporter: zlang@xxxxxxxxxx Regression: No shared/010 detected a 'possible' circular locking dependency, although it maybe not a real deadlock, but still hope to get reviewing for sure. [77175.048175] run fstests shared/010 at 2018-09-28 00:09:33 [77175.871044] XFS (dm-3): Unmounting Filesystem [77176.888694] XFS (dm-3): Mounting V5 Filesystem [77176.996978] XFS (dm-3): Ending clean mount [77177.157523] XFS (dm-3): Unmounting Filesystem [77178.132455] XFS (dm-3): Mounting V5 Filesystem [77178.217982] XFS (dm-3): Ending clean mount [77510.592827] ====================================================== [77510.599723] WARNING: possible circular locking dependency detected [77510.606621] 4.19.0-rc5+ #4 Not tainted [77510.610802] ------------------------------------------------------ [77510.617699] kswapd1/182 is trying to acquire lock: [77510.623046] 00000000c73c570f (sb_internal#2){.+.+}, at: xfs_trans_alloc+0x476/0x620 [xfs] [77510.632253] but task is already holding lock: [77510.638760] 00000000f626d6e6 (fs_reclaim){+.+.}, at: __fs_reclaim_acquire+0x5/0x30 [77510.647219] which lock already depends on the new lock. [77510.656346] the existing dependency chain (in reverse order) is: [77510.664698] -> #1 (fs_reclaim){+.+.}: [77510.670440] fs_reclaim_acquire.part.89+0x29/0x30 [77510.676274] kmem_cache_alloc+0x3d/0x330 [77510.681287] kmem_zone_alloc+0x6c/0x120 [xfs] [77510.686774] xfs_trans_alloc+0xeb/0x620 [xfs] [77510.692260] xfs_attr_set+0x59d/0x940 [xfs] [77510.697562] xfs_xattr_set+0x75/0xe0 [xfs] [77510.702716] __vfs_setxattr+0xd0/0x130 [77510.707480] __vfs_setxattr_noperm+0xe7/0x390 [77510.712922] vfs_setxattr+0xa3/0xd0 [77510.717403] setxattr+0x182/0x240 [77510.721682] path_setxattr+0x11b/0x130 [77510.726446] __x64_sys_lsetxattr+0xbd/0x150 [77510.731699] do_syscall_64+0xa5/0x470 [77510.736369] entry_SYSCALL_64_after_hwframe+0x49/0xbe [77510.742585] -> #0 (sb_internal#2){.+.+}: [77510.748607] lock_acquire+0x14f/0x3a0 [77510.753277] __sb_start_write+0x176/0x260 [77510.758386] xfs_trans_alloc+0x476/0x620 [xfs] [77510.763975] xfs_free_eofblocks+0x2eb/0x500 [xfs] [77510.769859] xfs_fs_destroy_inode+0x31b/0x8f0 [xfs] [77510.775885] dispose_list+0xfa/0x1d0 [77510.780455] prune_icache_sb+0xd9/0x150 [77510.785317] super_cache_scan+0x279/0x430 [77510.790374] do_shrink_slab+0x304/0x8d0 [77510.795234] shrink_slab+0x35f/0x420 [77510.799806] shrink_node+0x2db/0x1080 [77510.804474] kswapd+0x8df/0x12e0 [77510.808658] kthread+0x31a/0x3e0 [77510.812840] ret_from_fork+0x3a/0x50 [77510.817409] other info that might help us debug this: [77510.826344] Possible unsafe locking scenario: [77510.832951] CPU0 CPU1 [77510.838012] ---- ---- [77510.843066] lock(fs_reclaim); [77510.846570] lock(sb_internal#2); [77510.853176] lock(fs_reclaim); [77510.859492] lock(sb_internal#2); [77510.863286] *** DEADLOCK *** [77510.869894] 3 locks held by kswapd1/182: [77510.874268] #0: 00000000f626d6e6 (fs_reclaim){+.+.}, at: __fs_reclaim_acquire+0x5/0x30 [77510.883206] #1: 000000002d35879e (shrinker_rwsem){++++}, at: shrink_slab+0x135/0x420 [77510.891950] #2: 0000000064c43e71 (&type->s_umount_key#58){++++}, at: trylock_super+0x16/0xc0 [77510.901471] stack backtrace: [77510.906334] CPU: 11 PID: 182 Comm: kswapd1 Not tainted 4.19.0-rc5+ #4 [77510.913523] Hardware name: IBM System x3650 M4 -[7915ON3]-/00J6520, BIOS -[VVE124AUS-1.30]- 11/21/2012 [77510.923910] Call Trace: [77510.926642] dump_stack+0x9a/0xe9 [77510.930341] print_circular_bug.isra.33.cold.53+0x1bc/0x279 [77510.936561] ? save_trace+0xd6/0x250 [77510.940550] check_prev_add.constprop.40+0xc0f/0x14c0 [77510.946189] ? tsc_cs_mark_unstable+0x60/0x60 [77510.951051] ? check_usage+0x540/0x540 [77510.955234] ? native_sched_clock+0x7c/0x120 [77510.959997] ? tsc_cs_mark_unstable+0x60/0x60 [77510.964861] ? sched_clock+0x5/0x10 [77510.968754] ? sched_clock_cpu+0x18/0x170 [77510.973230] __lock_acquire+0x1f96/0x36e0 [77510.977706] ? mark_held_locks+0x140/0x140 [77510.982276] ? sched_clock_cpu+0x18/0x170 [77510.986750] ? find_held_lock+0x3a/0x1c0 [77510.991126] lock_acquire+0x14f/0x3a0 [77510.995266] ? xfs_trans_alloc+0x476/0x620 [xfs] [77511.000421] __sb_start_write+0x176/0x260 [77511.004939] ? xfs_trans_alloc+0x476/0x620 [xfs] [77511.010145] xfs_trans_alloc+0x476/0x620 [xfs] [77511.015154] xfs_free_eofblocks+0x2eb/0x500 [xfs] [77511.020404] ? find_held_lock+0x3a/0x1c0 [77511.024830] ? xfs_can_free_eofblocks+0x240/0x240 [xfs] [77511.030662] ? lock_downgrade+0x5e0/0x5e0 [77511.035139] ? do_raw_spin_unlock+0x54/0x1e0 [77511.039958] xfs_fs_destroy_inode+0x31b/0x8f0 [xfs] [77511.045404] dispose_list+0xfa/0x1d0 [77511.049396] ? list_lru_walk_one+0x97/0xd0 [77511.053966] prune_icache_sb+0xd9/0x150 [77511.058248] ? invalidate_inodes+0x380/0x380 [77511.063005] ? list_lru_count_one+0x160/0x310 [77511.067867] super_cache_scan+0x279/0x430 [77511.072343] do_shrink_slab+0x304/0x8d0 [77511.076615] shrink_slab+0x35f/0x420 [77511.080604] ? do_shrink_slab+0x8d0/0x8d0 [77511.085079] ? mem_cgroup_iter+0x198/0xa20 [77511.089649] ? mem_cgroup_protected+0x46/0x3f0 [77511.094607] ? vmpressure+0x2a/0x2a0 [77511.098598] shrink_node+0x2db/0x1080 [77511.102686] ? shrink_node_memcg+0x10e0/0x10e0 [77511.107635] ? mem_cgroup_nr_lru_pages+0x90/0x90 [77511.112787] ? inactive_list_is_low+0x253/0x550 [77511.117844] ? pgdat_balanced+0x8c/0xe0 [77511.122123] kswapd+0x8df/0x12e0 [77511.125728] ? mem_cgroup_shrink_node+0x620/0x620 [77511.130980] ? sched_clock_cpu+0x140/0x170 [77511.135550] ? find_held_lock+0x3a/0x1c0 [77511.139929] ? finish_wait+0x280/0x280 [77511.144112] ? lock_downgrade+0x5e0/0x5e0 [77511.148588] ? __kthread_parkme+0xb6/0x180 [77511.153159] ? mem_cgroup_shrink_node+0x620/0x620 [77511.158408] kthread+0x31a/0x3e0 [77511.162008] ? kthread_create_worker_on_cpu+0xc0/0xc0 [77511.167645] ret_from_fork+0x3a/0x50 [77530.225565] XFS (dm-3): Unmounting Filesystem [77532.976435] XFS (dm-3): Mounting V5 Filesystem [77533.061634] XFS (dm-3): Ending clean mount [77670.112391] XFS (dm-2): Unmounting Filesystem [77675.350231] XFS (dm-3): Unmounting Filesystem [77680.714375] XFS (dm-3): Mounting V5 Filesystem [77680.805766] XFS (dm-3): Ending clean mount -- You are receiving this mail because: You are watching the assignee of the bug.
