Hi
When debugging the qgroup problem, I found the following lockdep warning
outputted when running btrfs/114.
It seems to be more easy to trigger if run all qgroup tests in a row.
(-g qgroup)
The source is integration-4.6 branch *WITHOUT* my qgroup fix patch
v2(not submitted yet).
Just post this out as it seems to be related to a lot of infrastructures
like delayed_inode, delayed_refs, backref and qgroups.
Maybe some one has better idea of what's going wrong, and can fix it faster.
Thanks,
Qu
=========================================================
[ INFO: possible irq lock inversion dependency detected ]
4.5.0-rc6+ #6 Tainted: G O
---------------------------------------------------------
kswapd0/546 just changed the state of lock:
(&delayed_node->mutex){+.+.-.}, at: [<ffffffffa0568d1a>]
__btrfs_release_delayed_node+0x3a/0x200 [btrfs]
but this lock took another, RECLAIM_FS-unsafe lock in the past:
(pcpu_alloc_mutex){+.+.+.}
and interrupts could create inverse lock ordering between them.
other info that might help us debug this:
Chain exists of:
&delayed_node->mutex --> &found->groups_sem --> pcpu_alloc_mutex
Possible interrupt unsafe locking scenario:
CPU0 CPU1
---- ----
lock(pcpu_alloc_mutex);
local_irq_disable();
lock(&delayed_node->mutex);
lock(&found->groups_sem);
<Interrupt>
lock(&delayed_node->mutex);
*** DEADLOCK ***
2 locks held by kswapd0/546:
#0: (shrinker_rwsem){++++..}, at: [<ffffffff811c865d>]
shrink_slab.part.63.constprop.82+0x3d/0x500
#1: (&type->s_umount_key#30){+++++.}, at: [<ffffffff812198c6>]
trylock_super+0x16/0x50
the shortest dependencies between 2nd lock and 1st lock:
-> (pcpu_alloc_mutex){+.+.+.} ops: 1201 {
HARDIRQ-ON-W at:
[<ffffffff81108c46>] __lock_acquire+0xb46/0x1cf0
[<ffffffff81109ebd>] lock_acquire+0xcd/0x200
[<ffffffff81810901>] mutex_lock_nested+0x71/0x3b0
[<ffffffff811d8f9e>] pcpu_alloc+0x42e/0x620
[<ffffffff811d91b0>] __alloc_percpu+0x10/0x20
[<ffffffff8120e33b>]
__kmem_cache_create+0x36b/0x4c0
[<ffffffff811da87f>]
kmem_cache_create+0x11f/0x220
[<ffffffff8212cad9>]
debug_objects_mem_init+0x30/0x1ec
[<ffffffff820f3f6a>] start_kernel+0x3ca/0x491
[<ffffffff820f35ad>]
x86_64_start_reservations+0x2a/0x2c
[<ffffffff820f3699>]
x86_64_start_kernel+0xea/0xed
SOFTIRQ-ON-W at:
[<ffffffff81108af7>] __lock_acquire+0x9f7/0x1cf0
[<ffffffff81109ebd>] lock_acquire+0xcd/0x200
[<ffffffff81810901>] mutex_lock_nested+0x71/0x3b0
[<ffffffff811d8f9e>] pcpu_alloc+0x42e/0x620
[<ffffffff811d91b0>] __alloc_percpu+0x10/0x20
[<ffffffff8120e33b>]
__kmem_cache_create+0x36b/0x4c0
[<ffffffff811da87f>]
kmem_cache_create+0x11f/0x220
[<ffffffff8212cad9>]
debug_objects_mem_init+0x30/0x1ec
[<ffffffff820f3f6a>] start_kernel+0x3ca/0x491
[<ffffffff820f35ad>]
x86_64_start_reservations+0x2a/0x2c
[<ffffffff820f3699>]
x86_64_start_kernel+0xea/0xed
RECLAIM_FS-ON-W at:
[<ffffffff81106e81>] mark_held_locks+0x71/0x90
[<ffffffff811078e1>]
lockdep_trace_alloc+0xb1/0x100
[<ffffffff8120b8be>] __kmalloc+0x4e/0x280
[<ffffffff811d8592>] pcpu_mem_zalloc+0x32/0x60
[<ffffffff811d86c1>]
pcpu_create_chunk+0x11/0x120
[<ffffffff811d95f5>]
pcpu_balance_workfn+0x435/0x5a0
[<ffffffff810d8b9a>]
process_one_work+0x1fa/0x650
[<ffffffff810d9116>] worker_thread+0x126/0x4a0
[<ffffffff810df4dd>] kthread+0xed/0x110
[<ffffffff818150bf>] ret_from_fork+0x3f/0x70
INITIAL USE at:
[<ffffffff811084b3>] __lock_acquire+0x3b3/0x1cf0
[<ffffffff81109ebd>] lock_acquire+0xcd/0x200
[<ffffffff81810901>] mutex_lock_nested+0x71/0x3b0
[<ffffffff811d8f9e>] pcpu_alloc+0x42e/0x620
[<ffffffff811d91b0>] __alloc_percpu+0x10/0x20
[<ffffffff8120e33b>]
__kmem_cache_create+0x36b/0x4c0
[<ffffffff8211db72>] create_boot_cache+0x67/0x91
[<ffffffff8212062d>] kmem_cache_init+0x4b/0xf3
[<ffffffff820f3df1>] start_kernel+0x251/0x491
[<ffffffff820f35ad>]
x86_64_start_reservations+0x2a/0x2c
[<ffffffff820f3699>] x86_64_start_kernel+0xea/0xed
}
... key at: [<ffffffff81e63350>] pcpu_alloc_mutex+0x70/0xa0
... acquired at:
[<ffffffff81109ebd>] lock_acquire+0xcd/0x200
[<ffffffff81810901>] mutex_lock_nested+0x71/0x3b0
[<ffffffff811d8f9e>] pcpu_alloc+0x42e/0x620
[<ffffffff811d919d>] __alloc_percpu_gfp+0xd/0x10
[<ffffffff813b5ba5>] __percpu_counter_init+0x55/0xe0
[<ffffffffa0508b5b>] btrfs_init_fs_root+0x9b/0x1d0 [btrfs]
[<ffffffffa050a392>] btrfs_get_fs_root+0xc2/0x260 [btrfs]
[<ffffffffa0575b91>] __resolve_indirect_refs+0x121/0x7d0 [btrfs]
[<ffffffffa0576d6d>] find_parent_nodes+0x39d/0x760 [btrfs]
[<ffffffffa05771ee>] __btrfs_find_all_roots+0xbe/0x130 [btrfs]
[<ffffffffa05772d0>] btrfs_find_all_roots+0x50/0x60 [btrfs]
[<ffffffffa057ab33>] btrfs_qgroup_prepare_account_extents+0x53/0x90
[btrfs]
[<ffffffffa0511670>] btrfs_commit_transaction+0x490/0xb50 [btrfs]
[<ffffffffa04d9bda>] btrfs_sync_fs+0x7a/0x1d0 [btrfs]
[<ffffffff8124b5cc>] sync_filesystem+0x6c/0xa0
[<ffffffff81218532>] generic_shutdown_super+0x22/0xf0
[<ffffffff8121884d>] kill_anon_super+0xd/0x20
[<ffffffffa04de6b3>] btrfs_kill_super+0x13/0x110 [btrfs]
[<ffffffff81218aa9>] deactivate_locked_super+0x39/0x70
[<ffffffff81219071>] deactivate_super+0x41/0x60
[<ffffffff81237a0a>] cleanup_mnt+0x3a/0x80
[<ffffffff81237a8d>] __cleanup_mnt+0xd/0x10
[<ffffffff810ddb42>] task_work_run+0x72/0xa0
[<ffffffff810b7488>] exit_to_usermode_loop+0x60/0x89
[<ffffffff81001b35>] syscall_return_slowpath+0x85/0xb0
[<ffffffff81814eb1>] int_ret_from_sys_call+0x25/0x9f
-> (&fs_info->commit_root_sem){++++..} ops: 5719 {
HARDIRQ-ON-W at:
[<ffffffff81108c46>] __lock_acquire+0xb46/0x1cf0
[<ffffffff81109ebd>] lock_acquire+0xcd/0x200
[<ffffffff81812b15>] down_write+0x55/0xc0
[<ffffffffa04ee832>]
cache_block_group+0x282/0x450 [btrfs]
[<ffffffffa04fdf8a>]
find_free_extent+0xeda/0x10f0 [btrfs]
[<ffffffffa04fe24a>]
btrfs_reserve_extent+0xaa/0x140 [btrfs]
[<ffffffffa04fe44c>]
btrfs_alloc_tree_block+0x16c/0x490 [btrfs]
[<ffffffffa050a69a>]
btrfs_create_tree+0xba/0x2b0 [btrfs]
[<ffffffffa053ba0a>]
btrfs_create_uuid_tree+0x3a/0x130 [btrfs]
[<ffffffffa050e261>] open_ctree+0x24a1/0x2990
[btrfs]
[<ffffffffa04e1690>] btrfs_mount+0xc90/0xea0
[btrfs]
[<ffffffff8121a134>] mount_fs+0x34/0x170
[<ffffffff81238296>] vfs_kern_mount+0x66/0x150
[<ffffffffa04e0b86>] btrfs_mount+0x186/0xea0
[btrfs]
[<ffffffff8121a134>] mount_fs+0x34/0x170
[<ffffffff81238296>] vfs_kern_mount+0x66/0x150
[<ffffffff8123ae00>] do_mount+0x220/0xe90
[<ffffffff8123bd5e>] SyS_mount+0x7e/0xd0
[<ffffffff81814d57>]
entry_SYSCALL_64_fastpath+0x12/0x6f
HARDIRQ-ON-R at:
[<ffffffff81108ad1>] __lock_acquire+0x9d1/0x1cf0
[<ffffffff81109ebd>] lock_acquire+0xcd/0x200
[<ffffffff81812a6c>] down_read+0x4c/0xa0
[<ffffffffa04f341e>] caching_thread+0x5e/0x650
[btrfs]
[<ffffffffa054440a>]
normal_work_helper+0x19a/0x5b0 [btrfs]
[<ffffffffa054485d>]
btrfs_cache_helper+0xd/0x10 [btrfs]
[<ffffffff810d8b9a>] process_one_work+0x1fa/0x650
[<ffffffff810d9116>] worker_thread+0x126/0x4a0
[<ffffffff810df4dd>] kthread+0xed/0x110
[<ffffffff818150bf>] ret_from_fork+0x3f/0x70
SOFTIRQ-ON-W at:
[<ffffffff81108af7>] __lock_acquire+0x9f7/0x1cf0
[<ffffffff81109ebd>] lock_acquire+0xcd/0x200
[<ffffffff81812b15>] down_write+0x55/0xc0
[<ffffffffa04ee832>]
cache_block_group+0x282/0x450 [btrfs]
[<ffffffffa04fdf8a>]
find_free_extent+0xeda/0x10f0 [btrfs]
[<ffffffffa04fe24a>]
btrfs_reserve_extent+0xaa/0x140 [btrfs]
[<ffffffffa04fe44c>]
btrfs_alloc_tree_block+0x16c/0x490 [btrfs]
[<ffffffffa050a69a>]
btrfs_create_tree+0xba/0x2b0 [btrfs]
[<ffffffffa053ba0a>]
btrfs_create_uuid_tree+0x3a/0x130 [btrfs]
[<ffffffffa050e261>] open_ctree+0x24a1/0x2990
[btrfs]
[<ffffffffa04e1690>] btrfs_mount+0xc90/0xea0
[btrfs]
[<ffffffff8121a134>] mount_fs+0x34/0x170
[<ffffffff81238296>] vfs_kern_mount+0x66/0x150
[<ffffffffa04e0b86>] btrfs_mount+0x186/0xea0
[btrfs]
[<ffffffff8121a134>] mount_fs+0x34/0x170
[<ffffffff81238296>] vfs_kern_mount+0x66/0x150
[<ffffffff8123ae00>] do_mount+0x220/0xe90
[<ffffffff8123bd5e>] SyS_mount+0x7e/0xd0
[<ffffffff81814d57>]
entry_SYSCALL_64_fastpath+0x12/0x6f
SOFTIRQ-ON-R at:
[<ffffffff81108af7>] __lock_acquire+0x9f7/0x1cf0
[<ffffffff81109ebd>] lock_acquire+0xcd/0x200
[<ffffffff81812a6c>] down_read+0x4c/0xa0
[<ffffffffa04f341e>] caching_thread+0x5e/0x650
[btrfs]
[<ffffffffa054440a>]
normal_work_helper+0x19a/0x5b0 [btrfs]
[<ffffffffa054485d>]
btrfs_cache_helper+0xd/0x10 [btrfs]
[<ffffffff810d8b9a>] process_one_work+0x1fa/0x650
[<ffffffff810d9116>] worker_thread+0x126/0x4a0
[<ffffffff810df4dd>] kthread+0xed/0x110
[<ffffffff818150bf>] ret_from_fork+0x3f/0x70
INITIAL USE at:
[<ffffffff811084b3>] __lock_acquire+0x3b3/0x1cf0
[<ffffffff81109ebd>] lock_acquire+0xcd/0x200
[<ffffffff81812b15>] down_write+0x55/0xc0
[<ffffffffa04ee832>]
cache_block_group+0x282/0x450 [btrfs]
[<ffffffffa04fdf8a>]
find_free_extent+0xeda/0x10f0 [btrfs]
[<ffffffffa04fe24a>]
btrfs_reserve_extent+0xaa/0x140 [btrfs]
[<ffffffffa04fe44c>]
btrfs_alloc_tree_block+0x16c/0x490 [btrfs]
[<ffffffffa050a69a>]
btrfs_create_tree+0xba/0x2b0 [btrfs]
[<ffffffffa053ba0a>]
btrfs_create_uuid_tree+0x3a/0x130 [btrfs]
[<ffffffffa050e261>] open_ctree+0x24a1/0x2990
[btrfs]
[<ffffffffa04e1690>] btrfs_mount+0xc90/0xea0 [btrfs]
[<ffffffff8121a134>] mount_fs+0x34/0x170
[<ffffffff81238296>] vfs_kern_mount+0x66/0x150
[<ffffffffa04e0b86>] btrfs_mount+0x186/0xea0 [btrfs]
[<ffffffff8121a134>] mount_fs+0x34/0x170
[<ffffffff81238296>] vfs_kern_mount+0x66/0x150
[<ffffffff8123ae00>] do_mount+0x220/0xe90
[<ffffffff8123bd5e>] SyS_mount+0x7e/0xd0
[<ffffffff81814d57>]
entry_SYSCALL_64_fastpath+0x12/0x6f
}
... key at: [<ffffffffa05ab368>]
__key.50190+0x0/0xfffffffffffe6159 [btrfs]
... acquired at:
[<ffffffff81109ebd>] lock_acquire+0xcd/0x200
[<ffffffff81812b15>] down_write+0x55/0xc0
[<ffffffffa04ee832>] cache_block_group+0x282/0x450 [btrfs]
[<ffffffffa04fdf8a>] find_free_extent+0xeda/0x10f0 [btrfs]
[<ffffffffa04fe24a>] btrfs_reserve_extent+0xaa/0x140 [btrfs]
[<ffffffffa04fe44c>] btrfs_alloc_tree_block+0x16c/0x490 [btrfs]
[<ffffffffa050a69a>] btrfs_create_tree+0xba/0x2b0 [btrfs]
[<ffffffffa053ba0a>] btrfs_create_uuid_tree+0x3a/0x130 [btrfs]
[<ffffffffa050e261>] open_ctree+0x24a1/0x2990 [btrfs]
[<ffffffffa04e1690>] btrfs_mount+0xc90/0xea0 [btrfs]
[<ffffffff8121a134>] mount_fs+0x34/0x170
[<ffffffff81238296>] vfs_kern_mount+0x66/0x150
[<ffffffffa04e0b86>] btrfs_mount+0x186/0xea0 [btrfs]
[<ffffffff8121a134>] mount_fs+0x34/0x170
[<ffffffff81238296>] vfs_kern_mount+0x66/0x150
[<ffffffff8123ae00>] do_mount+0x220/0xe90
[<ffffffff8123bd5e>] SyS_mount+0x7e/0xd0
[<ffffffff81814d57>] entry_SYSCALL_64_fastpath+0x12/0x6f
-> (&found->groups_sem){++++..} ops: 9002 {
HARDIRQ-ON-W at:
[<ffffffff81108c46>] __lock_acquire+0xb46/0x1cf0
[<ffffffff81109ebd>] lock_acquire+0xcd/0x200
[<ffffffff81812b15>] down_write+0x55/0xc0
[<ffffffffa04f8a35>]
__link_block_group+0x35/0x140 [btrfs]
[<ffffffffa04fa1c3>]
btrfs_read_block_groups+0x2c3/0x620 [btrfs]
[<ffffffffa050d8fd>] open_ctree+0x1b3d/0x2990 [btrfs]
[<ffffffffa04e1690>] btrfs_mount+0xc90/0xea0 [btrfs]
[<ffffffff8121a134>] mount_fs+0x34/0x170
[<ffffffff81238296>] vfs_kern_mount+0x66/0x150
[<ffffffffa04e0b86>] btrfs_mount+0x186/0xea0 [btrfs]
[<ffffffff8121a134>] mount_fs+0x34/0x170
[<ffffffff81238296>] vfs_kern_mount+0x66/0x150
[<ffffffff8123ae00>] do_mount+0x220/0xe90
[<ffffffff8123bd5e>] SyS_mount+0x7e/0xd0
[<ffffffff81814d57>]
entry_SYSCALL_64_fastpath+0x12/0x6f
HARDIRQ-ON-R at:
[<ffffffff81108ad1>] __lock_acquire+0x9d1/0x1cf0
[<ffffffff81109ebd>] lock_acquire+0xcd/0x200
[<ffffffff81812a6c>] down_read+0x4c/0xa0
[<ffffffffa0508f70>]
btrfs_calc_num_tolerated_disk_barrier_failures+0x120/0x200 [btrfs]
[<ffffffffa050d915>] open_ctree+0x1b55/0x2990 [btrfs]
[<ffffffffa04e1690>] btrfs_mount+0xc90/0xea0 [btrfs]
[<ffffffff8121a134>] mount_fs+0x34/0x170
[<ffffffff81238296>] vfs_kern_mount+0x66/0x150
[<ffffffffa04e0b86>] btrfs_mount+0x186/0xea0 [btrfs]
[<ffffffff8121a134>] mount_fs+0x34/0x170
[<ffffffff81238296>] vfs_kern_mount+0x66/0x150
[<ffffffff8123ae00>] do_mount+0x220/0xe90
[<ffffffff8123bd5e>] SyS_mount+0x7e/0xd0
[<ffffffff81814d57>]
entry_SYSCALL_64_fastpath+0x12/0x6f
SOFTIRQ-ON-W at:
[<ffffffff81108af7>] __lock_acquire+0x9f7/0x1cf0
[<ffffffff81109ebd>] lock_acquire+0xcd/0x200
[<ffffffff81812b15>] down_write+0x55/0xc0
[<ffffffffa04f8a35>]
__link_block_group+0x35/0x140 [btrfs]
[<ffffffffa04fa1c3>]
btrfs_read_block_groups+0x2c3/0x620 [btrfs]
[<ffffffffa050d8fd>] open_ctree+0x1b3d/0x2990 [btrfs]
[<ffffffffa04e1690>] btrfs_mount+0xc90/0xea0 [btrfs]
[<ffffffff8121a134>] mount_fs+0x34/0x170
[<ffffffff81238296>] vfs_kern_mount+0x66/0x150
[<ffffffffa04e0b86>] btrfs_mount+0x186/0xea0 [btrfs]
[<ffffffff8121a134>] mount_fs+0x34/0x170
[<ffffffff81238296>] vfs_kern_mount+0x66/0x150
[<ffffffff8123ae00>] do_mount+0x220/0xe90
[<ffffffff8123bd5e>] SyS_mount+0x7e/0xd0
[<ffffffff81814d57>]
entry_SYSCALL_64_fastpath+0x12/0x6f
SOFTIRQ-ON-R at:
[<ffffffff81108af7>] __lock_acquire+0x9f7/0x1cf0
[<ffffffff81109ebd>] lock_acquire+0xcd/0x200
[<ffffffff81812a6c>] down_read+0x4c/0xa0
[<ffffffffa0508f70>]
btrfs_calc_num_tolerated_disk_barrier_failures+0x120/0x200 [btrfs]
[<ffffffffa050d915>] open_ctree+0x1b55/0x2990 [btrfs]
[<ffffffffa04e1690>] btrfs_mount+0xc90/0xea0 [btrfs]
[<ffffffff8121a134>] mount_fs+0x34/0x170
[<ffffffff81238296>] vfs_kern_mount+0x66/0x150
[<ffffffffa04e0b86>] btrfs_mount+0x186/0xea0 [btrfs]
[<ffffffff8121a134>] mount_fs+0x34/0x170
[<ffffffff81238296>] vfs_kern_mount+0x66/0x150
[<ffffffff8123ae00>] do_mount+0x220/0xe90
[<ffffffff8123bd5e>] SyS_mount+0x7e/0xd0
[<ffffffff81814d57>]
entry_SYSCALL_64_fastpath+0x12/0x6f
INITIAL USE at:
[<ffffffff811084b3>] __lock_acquire+0x3b3/0x1cf0
[<ffffffff81109ebd>] lock_acquire+0xcd/0x200
[<ffffffff81812b15>] down_write+0x55/0xc0
[<ffffffffa04f8a35>] __link_block_group+0x35/0x140
[btrfs]
[<ffffffffa04fa1c3>]
btrfs_read_block_groups+0x2c3/0x620 [btrfs]
[<ffffffffa050d8fd>] open_ctree+0x1b3d/0x2990 [btrfs]
[<ffffffffa04e1690>] btrfs_mount+0xc90/0xea0 [btrfs]
[<ffffffff8121a134>] mount_fs+0x34/0x170
[<ffffffff81238296>] vfs_kern_mount+0x66/0x150
[<ffffffffa04e0b86>] btrfs_mount+0x186/0xea0 [btrfs]
[<ffffffff8121a134>] mount_fs+0x34/0x170
[<ffffffff81238296>] vfs_kern_mount+0x66/0x150
[<ffffffff8123ae00>] do_mount+0x220/0xe90
[<ffffffff8123bd5e>] SyS_mount+0x7e/0xd0
[<ffffffff81814d57>]
entry_SYSCALL_64_fastpath+0x12/0x6f
}
... key at: [<ffffffffa05ab278>]
__key.48892+0x0/0xfffffffffffe6249 [btrfs]
... acquired at:
[<ffffffff81109ebd>] lock_acquire+0xcd/0x200
[<ffffffff81812a6c>] down_read+0x4c/0xa0
[<ffffffffa04fdc6c>] find_free_extent+0xbbc/0x10f0 [btrfs]
[<ffffffffa04fe24a>] btrfs_reserve_extent+0xaa/0x140 [btrfs]
[<ffffffffa04fe44c>] btrfs_alloc_tree_block+0x16c/0x490 [btrfs]
[<ffffffffa04e5027>] __btrfs_cow_block+0x117/0x5a0 [btrfs]
[<ffffffffa04e5649>] btrfs_cow_block+0x119/0x270 [btrfs]
[<ffffffffa04e90c6>] btrfs_search_slot+0x1c6/0x9b0 [btrfs]
[<ffffffffa0569582>] btrfs_delete_delayed_items+0xb2/0x310 [btrfs]
[<ffffffffa0569f47>] __btrfs_run_delayed_items+0x137/0x200 [btrfs]
[<ffffffffa056a03e>] btrfs_run_delayed_items+0xe/0x10 [btrfs]
[<ffffffffa051148b>] btrfs_commit_transaction+0x2ab/0xb50 [btrfs]
[<ffffffffa04d9bda>] btrfs_sync_fs+0x7a/0x1d0 [btrfs]
[<ffffffff8124b55b>] sync_fs_one_sb+0x1b/0x20
[<ffffffff81219b39>] iterate_supers+0xa9/0x100
[<ffffffff8124b650>] sys_sync+0x50/0x90
[<ffffffff81814d57>] entry_SYSCALL_64_fastpath+0x12/0x6f
-> (&delayed_node->mutex){+.+.-.} ops: 1373744 {
HARDIRQ-ON-W at:
[<ffffffff81108c46>] __lock_acquire+0xb46/0x1cf0
[<ffffffff81109ebd>] lock_acquire+0xcd/0x200
[<ffffffff81810901>] mutex_lock_nested+0x71/0x3b0
[<ffffffffa056b063>]
btrfs_delayed_update_inode+0x43/0x850 [btrfs]
[<ffffffffa0517d1a>] btrfs_update_inode+0x8a/0x100
[btrfs]
[<ffffffffa0521060>] btrfs_create+0x130/0x1e0 [btrfs]
[<ffffffff81221e4d>] vfs_create+0xbd/0x120
[<ffffffff812250d5>] path_openat+0x915/0x1400
[<ffffffff81226bc9>] do_filp_open+0x79/0xd0
[<ffffffff81214e20>] do_sys_open+0x110/0x1f0
[<ffffffff81214f19>] SyS_open+0x19/0x20
[<ffffffff81814d57>]
entry_SYSCALL_64_fastpath+0x12/0x6f
SOFTIRQ-ON-W at:
[<ffffffff81108af7>] __lock_acquire+0x9f7/0x1cf0
[<ffffffff81109ebd>] lock_acquire+0xcd/0x200
[<ffffffff81810901>] mutex_lock_nested+0x71/0x3b0
[<ffffffffa056b063>]
btrfs_delayed_update_inode+0x43/0x850 [btrfs]
[<ffffffffa0517d1a>] btrfs_update_inode+0x8a/0x100
[btrfs]
[<ffffffffa0521060>] btrfs_create+0x130/0x1e0 [btrfs]
[<ffffffff81221e4d>] vfs_create+0xbd/0x120
[<ffffffff812250d5>] path_openat+0x915/0x1400
[<ffffffff81226bc9>] do_filp_open+0x79/0xd0
[<ffffffff81214e20>] do_sys_open+0x110/0x1f0
[<ffffffff81214f19>] SyS_open+0x19/0x20
[<ffffffff81814d57>]
entry_SYSCALL_64_fastpath+0x12/0x6f
IN-RECLAIM_FS-W at:
[<ffffffff81108a7f>] __lock_acquire+0x97f/0x1cf0
[<ffffffff81109ebd>] lock_acquire+0xcd/0x200
[<ffffffff81810901>] mutex_lock_nested+0x71/0x3b0
[<ffffffffa0568d1a>]
__btrfs_release_delayed_node+0x3a/0x200 [btrfs]
[<ffffffffa056a2ef>]
btrfs_remove_delayed_node+0x1f/0x30 [btrfs]
[<ffffffffa051dcb7>]
btrfs_evict_inode+0x1f7/0x680 [btrfs]
[<ffffffff81233130>] evict+0xc0/0x1a0
[<ffffffff81233244>] dispose_list+0x34/0x60
[<ffffffff81234346>] prune_icache_sb+0x46/0x60
[<ffffffff81219a3c>] super_cache_scan+0x13c/0x190
[<ffffffff811c8826>]
shrink_slab.part.63.constprop.82+0x206/0x500
[<ffffffff811ccd97>] shrink_zone+0x147/0x160
[<ffffffff811cdb5b>] kswapd+0x49b/0xa80
[<ffffffff810df4dd>] kthread+0xed/0x110
[<ffffffff818150bf>] ret_from_fork+0x3f/0x70
INITIAL USE at:
[<ffffffff811084b3>] __lock_acquire+0x3b3/0x1cf0
[<ffffffff81109ebd>] lock_acquire+0xcd/0x200
[<ffffffff81810901>] mutex_lock_nested+0x71/0x3b0
[<ffffffffa056b063>]
btrfs_delayed_update_inode+0x43/0x850 [btrfs]
[<ffffffffa0517d1a>] btrfs_update_inode+0x8a/0x100
[btrfs]
[<ffffffffa0521060>] btrfs_create+0x130/0x1e0 [btrfs]
[<ffffffff81221e4d>] vfs_create+0xbd/0x120
[<ffffffff812250d5>] path_openat+0x915/0x1400
[<ffffffff81226bc9>] do_filp_open+0x79/0xd0
[<ffffffff81214e20>] do_sys_open+0x110/0x1f0
[<ffffffff81214f19>] SyS_open+0x19/0x20
[<ffffffff81814d57>] entry_SYSCALL_64_fastpath+0x12/0x6f
}
... key at: [<ffffffffa05af268>]
__key.46828+0x0/0xfffffffffffe2259 [btrfs]
... acquired at:
[<ffffffff811064d5>] check_usage_forwards+0x115/0x120
[<ffffffff81106d0b>] mark_lock+0x1db/0x2e0
[<ffffffff81108a7f>] __lock_acquire+0x97f/0x1cf0
[<ffffffff81109ebd>] lock_acquire+0xcd/0x200
[<ffffffff81810901>] mutex_lock_nested+0x71/0x3b0
[<ffffffffa0568d1a>] __btrfs_release_delayed_node+0x3a/0x200 [btrfs]
[<ffffffffa056a2ef>] btrfs_remove_delayed_node+0x1f/0x30 [btrfs]
[<ffffffffa051dcb7>] btrfs_evict_inode+0x1f7/0x680 [btrfs]
[<ffffffff81233130>] evict+0xc0/0x1a0
[<ffffffff81233244>] dispose_list+0x34/0x60
[<ffffffff81234346>] prune_icache_sb+0x46/0x60
[<ffffffff81219a3c>] super_cache_scan+0x13c/0x190
[<ffffffff811c8826>] shrink_slab.part.63.constprop.82+0x206/0x500
[<ffffffff811ccd97>] shrink_zone+0x147/0x160
[<ffffffff811cdb5b>] kswapd+0x49b/0xa80
[<ffffffff810df4dd>] kthread+0xed/0x110
[<ffffffff818150bf>] ret_from_fork+0x3f/0x70
stack backtrace:
CPU: 0 PID: 546 Comm: kswapd0 Tainted: G O 4.5.0-rc6+ #6
Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox
12/01/2006
0000000000000000 ffff88003dacb808 ffffffff8138090f ffffffff82d9cf80
ffff88003de01b00 ffff88003dacb848 ffffffff811b271f ffffffff81c85849
0000000000000000 ffff88003de023a8 ffff88003de01b00 ffffffff81c85849
Call Trace:
[<ffffffff8138090f>] dump_stack+0x67/0x98
[<ffffffff811b271f>] print_irq_inversion_bug.part.34+0x1ac/0x1b8
[<ffffffff811064d5>] check_usage_forwards+0x115/0x120
[<ffffffff811063c0>] ? check_usage_backwards+0x120/0x120
[<ffffffff81106d0b>] mark_lock+0x1db/0x2e0
[<ffffffff81108a7f>] __lock_acquire+0x97f/0x1cf0
[<ffffffff818144d7>] ? _raw_spin_unlock_irq+0x27/0x40
[<ffffffff811070ad>] ? trace_hardirqs_on+0xd/0x10
[<ffffffff818144d7>] ? _raw_spin_unlock_irq+0x27/0x40
[<ffffffff810e78b6>] ? finish_task_switch+0xa6/0x2c0
[<ffffffff810e7877>] ? finish_task_switch+0x67/0x2c0
[<ffffffff81109ebd>] lock_acquire+0xcd/0x200
[<ffffffffa0568d1a>] ? __btrfs_release_delayed_node+0x3a/0x200 [btrfs]
[<ffffffff81810901>] mutex_lock_nested+0x71/0x3b0
[<ffffffffa0568d1a>] ? __btrfs_release_delayed_node+0x3a/0x200 [btrfs]
[<ffffffffa0568d1a>] ? __btrfs_release_delayed_node+0x3a/0x200 [btrfs]
[<ffffffffa0568d1a>] __btrfs_release_delayed_node+0x3a/0x200 [btrfs]
[<ffffffffa056a2ef>] btrfs_remove_delayed_node+0x1f/0x30 [btrfs]
[<ffffffffa051dcb7>] btrfs_evict_inode+0x1f7/0x680 [btrfs]
[<ffffffff81814412>] ? _raw_spin_unlock+0x22/0x30
[<ffffffff81233130>] evict+0xc0/0x1a0
[<ffffffff81233244>] dispose_list+0x34/0x60
[<ffffffff81234346>] prune_icache_sb+0x46/0x60
[<ffffffff81219a3c>] super_cache_scan+0x13c/0x190
[<ffffffff811c8826>] shrink_slab.part.63.constprop.82+0x206/0x500
[<ffffffff811ccd97>] shrink_zone+0x147/0x160
[<ffffffff811cdb5b>] kswapd+0x49b/0xa80
[<ffffffff811cd6c0>] ? shrink_all_memory+0xb0/0xb0
[<ffffffff810df4dd>] kthread+0xed/0x110
[<ffffffff810df3f0>] ? kthread_create_on_node+0x220/0x220
[<ffffffff818150bf>] ret_from_fork+0x3f/0x70
[<ffffffff810df3f0>] ? kthread_create_on_node+0x220/0x220
------
--
To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
