Hi Miao,
The possible circular locking dependency message doesn't show up in the updated V5. However,
I see a new possible irq lock inversion dependency message while running xfstests.
=========================================================
[ INFO: possible irq lock inversion dependency detected ]
2.6.36-xie+ #122
---------------------------------------------------------
kswapd0/49 just changed the state of lock:
(iprune_sem){++++.-}, at: [<ffffffff811316d0>] shrink_icache_memory+0x4d/0x213
but this lock took another, RECLAIM_FS-unsafe lock in the past:
(&delayed_node->mutex){+.+.+.}
and interrupts could create inverse lock ordering between them.
other info that might help us debug this:
1 lock held by kswapd0/49:
#0: (shrinker_rwsem){++++..}, at: [<ffffffff810e242a>] shrink_slab+0x3d/0x164
the shortest dependencies between 2nd lock and 1st lock:
-> (&delayed_node->mutex){+.+.+.} ops: 1703807 {
HARDIRQ-ON-W at:
[<ffffffff81075ec0>] __lock_acquire+0x346/0xda6
[<ffffffff81076a3d>] lock_acquire+0x11d/0x143
[<ffffffff814c62b1>] __mutex_lock_common+0x5a/0x444
[<ffffffff814c6750>] mutex_lock_nested+0x39/0x3e
[<ffffffff81211fd4>] btrfs_delayed_update_inode+0x45/0x101
[<ffffffff811dc5c3>] btrfs_update_inode+0x2e/0x129
[<ffffffff811e0cba>] btrfs_truncate+0x43d/0x477
[<ffffffff810dfb22>] vmtruncate+0x44/0x52
[<ffffffff811e0ef6>] btrfs_setattr+0x202/0x253
[<ffffffff8113201e>] notify_change+0x1a2/0x29d
[<ffffffff8111bf08>] do_truncate+0x6c/0x89
[<ffffffff81127a77>] do_last+0x579/0x57e
[<ffffffff81129502>] do_filp_open+0x215/0x5ae
[<ffffffff8111aec0>] do_sys_open+0x60/0xfc
[<ffffffff8111af8f>] sys_open+0x20/0x22
[<ffffffff81002ddb>] system_call_fastpath+0x16/0x1b
SOFTIRQ-ON-W at:
[<ffffffff81075ee1>] __lock_acquire+0x367/0xda6
[<ffffffff81076a3d>] lock_acquire+0x11d/0x143
[<ffffffff814c62b1>] __mutex_lock_common+0x5a/0x444
[<ffffffff814c6750>] mutex_lock_nested+0x39/0x3e
[<ffffffff81211fd4>] btrfs_delayed_update_inode+0x45/0x101
[<ffffffff811dc5c3>] btrfs_update_inode+0x2e/0x129
[<ffffffff811e0cba>] btrfs_truncate+0x43d/0x477
[<ffffffff810dfb22>] vmtruncate+0x44/0x52
[<ffffffff811e0ef6>] btrfs_setattr+0x202/0x253
[<ffffffff8113201e>] notify_change+0x1a2/0x29d
[<ffffffff8111bf08>] do_truncate+0x6c/0x89
[<ffffffff81127a77>] do_last+0x579/0x57e
[<ffffffff81129502>] do_filp_open+0x215/0x5ae
[<ffffffff8111aec0>] do_sys_open+0x60/0xfc
[<ffffffff8111af8f>] sys_open+0x20/0x22
[<ffffffff81002ddb>] system_call_fastpath+0x16/0x1b
RECLAIM_FS-ON-W at:
[<ffffffff81074292>] mark_held_locks+0x52/0x70
[<ffffffff81074354>] lockdep_trace_alloc+0xa4/0xc2
[<ffffffff8110f206>] __kmalloc+0x7f/0x154
[<ffffffff811c2c21>] kzalloc+0x14/0x16
[<ffffffff811c5e83>] cache_block_group+0x106/0x238
[<ffffffff811c7069>] find_free_extent+0x4e2/0xa86
[<ffffffff811c76c1>] btrfs_reserve_extent+0xb4/0x142
[<ffffffff811c78b6>] btrfs_alloc_free_block+0x167/0x2af
[<ffffffff811be610>] __btrfs_cow_block+0x103/0x346
[<ffffffff811bedb8>] btrfs_cow_block+0x101/0x110
[<ffffffff811c05d8>] btrfs_search_slot+0x143/0x513
[<ffffffff811cf5ab>] btrfs_lookup_inode+0x2f/0x8f
[<ffffffff81212405>] btrfs_update_delayed_inode+0x75/0x135
[<ffffffff8121340d>] btrfs_run_delayed_items+0xd6/0x131
[<ffffffff811d64d7>] btrfs_commit_transaction+0x28b/0x668
[<ffffffff811ba786>] btrfs_sync_fs+0x6b/0x70
[<ffffffff81140265>] __sync_filesystem+0x6b/0x83
[<ffffffff81140347>] sync_filesystem+0x4c/0x50
[<ffffffff8111fc56>] generic_shutdown_super+0x27/0xd7
[<ffffffff8111fd5b>] kill_anon_super+0x16/0x54
[<ffffffff8111effd>] deactivate_locked_super+0x26/0x46
[<ffffffff8111f495>] deactivate_super+0x45/0x4a
[<ffffffff81135962>] mntput_no_expire+0xd6/0x104
[<ffffffff81136a87>] sys_umount+0x2c1/0x2ec
[<ffffffff81002ddb>] system_call_fastpath+0x16/0x1b
INITIAL USE at:
[<ffffffff81075f37>] __lock_acquire+0x3bd/0xda6
[<ffffffff81076a3d>] lock_acquire+0x11d/0x143
[<ffffffff814c62b1>] __mutex_lock_common+0x5a/0x444
[<ffffffff814c6750>] mutex_lock_nested+0x39/0x3e
[<ffffffff81211fd4>] btrfs_delayed_update_inode+0x45/0x101
[<ffffffff811dc5c3>] btrfs_update_inode+0x2e/0x129
[<ffffffff811e0cba>] btrfs_truncate+0x43d/0x477
[<ffffffff810dfb22>] vmtruncate+0x44/0x52
[<ffffffff811e0ef6>] btrfs_setattr+0x202/0x253
[<ffffffff8113201e>] notify_change+0x1a2/0x29d
[<ffffffff8111bf08>] do_truncate+0x6c/0x89
[<ffffffff81127a77>] do_last+0x579/0x57e
[<ffffffff81129502>] do_filp_open+0x215/0x5ae
[<ffffffff8111aec0>] do_sys_open+0x60/0xfc
[<ffffffff8111af8f>] sys_open+0x20/0x22
[<ffffffff81002ddb>] system_call_fastpath+0x16/0x1b
}
... key at: [<ffffffff82925450>] __key.31289+0x0/0x8
... acquired at:
[<ffffffff81076a3d>] lock_acquire+0x11d/0x143
[<ffffffff814c62b1>] __mutex_lock_common+0x5a/0x444
[<ffffffff814c6750>] mutex_lock_nested+0x39/0x3e
[<ffffffff81213217>] btrfs_remove_delayed_node+0x3e/0xd2
[<ffffffff811d77ca>] btrfs_destroy_inode+0x2ae/0x2d4
[<ffffffff81130dc1>] destroy_inode+0x2f/0x45
[<ffffffff811312ca>] dispose_list+0xaa/0xdf
[<ffffffff81131427>] invalidate_inodes+0x128/0x146
[<ffffffff8111fc76>] generic_shutdown_super+0x47/0xd7
[<ffffffff8111fd5b>] kill_anon_super+0x16/0x54
[<ffffffff8111effd>] deactivate_locked_super+0x26/0x46
[<ffffffff8111f495>] deactivate_super+0x45/0x4a
[<ffffffff81135962>] mntput_no_expire+0xd6/0x104
[<ffffffff81136a87>] sys_umount+0x2c1/0x2ec
[<ffffffff81002ddb>] system_call_fastpath+0x16/0x1b
-> (iprune_sem){++++.-} ops: 69 {
HARDIRQ-ON-W at:
[<ffffffff81075ec0>] __lock_acquire+0x346/0xda6
[<ffffffff81076a3d>] lock_acquire+0x11d/0x143
[<ffffffff814c6a4a>] down_write+0x55/0x9b
[<ffffffff8113133d>] invalidate_inodes+0x3e/0x146
[<ffffffff8111fc76>] generic_shutdown_super+0x47/0xd7
[<ffffffff8111fd5b>] kill_anon_super+0x16/0x54
[<ffffffffa034d679>] nfs4_kill_super+0x44/0x77 [nfs]
[<ffffffff8111effd>] deactivate_locked_super+0x26/0x46
[<ffffffff8111f495>] deactivate_super+0x45/0x4a
[<ffffffff81135962>] mntput_no_expire+0xd6/0x104
[<ffffffff81135b40>] release_mounts+0x8e/0xa4
[<ffffffff81135bb7>] put_mnt_ns+0x61/0x72
[<ffffffffa034d3da>] nfs_follow_remote_path+0x207/0x302 [nfs]
[<ffffffffa034d5fb>] nfs4_try_mount+0x7a/0xb4 [nfs]
[<ffffffffa034e8a3>] nfs_get_sb+0x4cf/0x750 [nfs]
[<ffffffff8111f25e>] vfs_kern_mount+0xbd/0x1a7
[<ffffffff8111f3b0>] do_kern_mount+0x4d/0xed
[<ffffffff8113668d>] do_mount+0x74e/0x7c5
[<ffffffff8113678c>] sys_mount+0x88/0xc2
[<ffffffff81002ddb>] system_call_fastpath+0x16/0x1b
HARDIRQ-ON-R at:
[<ffffffff81075e98>] __lock_acquire+0x31e/0xda6
[<ffffffff81076a3d>] lock_acquire+0x11d/0x143
[<ffffffff814c6adc>] down_read+0x4c/0x91
[<ffffffff811316d0>] shrink_icache_memory+0x4d/0x213
[<ffffffff810e24cd>] shrink_slab+0xe0/0x164
[<ffffffff810e4619>] balance_pgdat+0x2e8/0x50b
[<ffffffff810e4bbc>] kswapd+0x380/0x3c0
[<ffffffff81061a60>] kthread+0x9d/0xa5
[<ffffffff81003c14>] kernel_thread_helper+0x4/0x10
SOFTIRQ-ON-W at:
[<ffffffff81075ee1>] __lock_acquire+0x367/0xda6
[<ffffffff81076a3d>] lock_acquire+0x11d/0x143
[<ffffffff814c6a4a>] down_write+0x55/0x9b
[<ffffffff8113133d>] invalidate_inodes+0x3e/0x146
[<ffffffff8111fc76>] generic_shutdown_super+0x47/0xd7
[<ffffffff8111fd5b>] kill_anon_super+0x16/0x54
[<ffffffffa034d679>] nfs4_kill_super+0x44/0x77 [nfs]
[<ffffffff8111effd>] deactivate_locked_super+0x26/0x46
[<ffffffff8111f495>] deactivate_super+0x45/0x4a
[<ffffffff81135962>] mntput_no_expire+0xd6/0x104
[<ffffffff81135b40>] release_mounts+0x8e/0xa4
[<ffffffff81135bb7>] put_mnt_ns+0x61/0x72
[<ffffffffa034d3da>] nfs_follow_remote_path+0x207/0x302 [nfs]
[<ffffffffa034d5fb>] nfs4_try_mount+0x7a/0xb4 [nfs]
[<ffffffffa034e8a3>] nfs_get_sb+0x4cf/0x750 [nfs]
[<ffffffff8111f25e>] vfs_kern_mount+0xbd/0x1a7
[<ffffffff8111f3b0>] do_kern_mount+0x4d/0xed
[<ffffffff8113668d>] do_mount+0x74e/0x7c5
[<ffffffff8113678c>] sys_mount+0x88/0xc2
[<ffffffff81002ddb>] system_call_fastpath+0x16/0x1b
SOFTIRQ-ON-R at:
[<ffffffff81075ee1>] __lock_acquire+0x367/0xda6
[<ffffffff81076a3d>] lock_acquire+0x11d/0x143
[<ffffffff814c6adc>] down_read+0x4c/0x91
[<ffffffff811316d0>] shrink_icache_memory+0x4d/0x213
[<ffffffff810e24cd>] shrink_slab+0xe0/0x164
[<ffffffff810e4619>] balance_pgdat+0x2e8/0x50b
[<ffffffff810e4bbc>] kswapd+0x380/0x3c0
[<ffffffff81061a60>] kthread+0x9d/0xa5
[<ffffffff81003c14>] kernel_thread_helper+0x4/0x10
IN-RECLAIM_FS-R at:
[<ffffffff81075f1f>] __lock_acquire+0x3a5/0xda6
[<ffffffff81076a3d>] lock_acquire+0x11d/0x143
[<ffffffff814c6adc>] down_read+0x4c/0x91
[<ffffffff811316d0>] shrink_icache_memory+0x4d/0x213
[<ffffffff810e24cd>] shrink_slab+0xe0/0x164
[<ffffffff810e4619>] balance_pgdat+0x2e8/0x50b
[<ffffffff810e4bbc>] kswapd+0x380/0x3c0
[<ffffffff81061a60>] kthread+0x9d/0xa5
[<ffffffff81003c14>] kernel_thread_helper+0x4/0x10
INITIAL USE at:
[<ffffffff81075f37>] __lock_acquire+0x3bd/0xda6
[<ffffffff81076a3d>] lock_acquire+0x11d/0x143
[<ffffffff814c6a4a>] down_write+0x55/0x9b
[<ffffffff8113133d>] invalidate_inodes+0x3e/0x146
[<ffffffff8111fc76>] generic_shutdown_super+0x47/0xd7
[<ffffffff8111fd5b>] kill_anon_super+0x16/0x54
[<ffffffffa034d679>] nfs4_kill_super+0x44/0x77 [nfs]
[<ffffffff8111effd>] deactivate_locked_super+0x26/0x46
[<ffffffff8111f495>] deactivate_super+0x45/0x4a
[<ffffffff81135962>] mntput_no_expire+0xd6/0x104
[<ffffffff81135b40>] release_mounts+0x8e/0xa4
[<ffffffff81135bb7>] put_mnt_ns+0x61/0x72
[<ffffffffa034d3da>] nfs_follow_remote_path+0x207/0x302 [nfs]
[<ffffffffa034d5fb>] nfs4_try_mount+0x7a/0xb4 [nfs]
[<ffffffffa034e8a3>] nfs_get_sb+0x4cf/0x750 [nfs]
[<ffffffff8111f25e>] vfs_kern_mount+0xbd/0x1a7
[<ffffffff8111f3b0>] do_kern_mount+0x4d/0xed
[<ffffffff8113668d>] do_mount+0x74e/0x7c5
[<ffffffff8113678c>] sys_mount+0x88/0xc2
[<ffffffff81002ddb>] system_call_fastpath+0x16/0x1b
}
... key at: [<ffffffff81a4d268>] iprune_sem+0x58/0xb0
... acquired at:
[<ffffffff810749bf>] check_usage_forwards+0x71/0x7e
[<ffffffff81074113>] mark_lock+0x13d/0x26a
[<ffffffff81075f1f>] __lock_acquire+0x3a5/0xda6
[<ffffffff81076a3d>] lock_acquire+0x11d/0x143
[<ffffffff814c6adc>] down_read+0x4c/0x91
[<ffffffff811316d0>] shrink_icache_memory+0x4d/0x213
[<ffffffff810e24cd>] shrink_slab+0xe0/0x164
[<ffffffff810e4619>] balance_pgdat+0x2e8/0x50b
[<ffffffff810e4bbc>] kswapd+0x380/0x3c0
[<ffffffff81061a60>] kthread+0x9d/0xa5
[<ffffffff81003c14>] kernel_thread_helper+0x4/0x10
stack backtrace:
Pid: 49, comm: kswapd0 Not tainted 2.6.36-xie+ #122
Call Trace:
[<ffffffff8107493d>] print_irq_inversion_bug+0x124/0x135
[<ffffffff810749bf>] check_usage_forwards+0x71/0x7e
[<ffffffff8107494e>] ? check_usage_forwards+0x0/0x7e
[<ffffffff81074113>] mark_lock+0x13d/0x26a
[<ffffffff81075f1f>] __lock_acquire+0x3a5/0xda6
[<ffffffff81074003>] ? mark_lock+0x2d/0x26a
[<ffffffff81076911>] ? __lock_acquire+0xd97/0xda6
[<ffffffff811316d0>] ? shrink_icache_memory+0x4d/0x213
[<ffffffff81076a3d>] lock_acquire+0x11d/0x143
[<ffffffff811316d0>] ? shrink_icache_memory+0x4d/0x213
[<ffffffff810dcdfb>] ? global_dirty_limits+0x17/0xca
[<ffffffff814c6adc>] down_read+0x4c/0x91
[<ffffffff811316d0>] ? shrink_icache_memory+0x4d/0x213
[<ffffffff811316d0>] shrink_icache_memory+0x4d/0x213
[<ffffffff810e24cd>] shrink_slab+0xe0/0x164
[<ffffffff810e4619>] balance_pgdat+0x2e8/0x50b
[<ffffffff810e4bbc>] kswapd+0x380/0x3c0
[<ffffffff81062032>] ? autoremove_wake_function+0x0/0x39
[<ffffffff810e483c>] ? kswapd+0x0/0x3c0
[<ffffffff81061a60>] kthread+0x9d/0xa5
[<ffffffff81003c14>] kernel_thread_helper+0x4/0x10
[<ffffffff81038cd9>] ? finish_task_switch+0x70/0xb9
[<ffffffff814c88c0>] ? restore_args+0x0/0x30
[<ffffffff810619c3>] ? kthread+0x0/0xa5
[<ffffffff81003c10>] ? kernel_thread_helper+0x0/0x10
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