http://oss.sgi.com/bugzilla/show_bug.cgi?id=738
Summary: INFO: possible recursive locking detected
Product: Linux XFS
Version: unspecified
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: XFS kernel code
AssignedTo: xfs-master@xxxxxxxxxxx
ReportedBy: orion@xxxxxxxxxxxxx
This is with Fedora kernel 2.6.19-1.2288.fc5debug
[ INFO: possible recursive locking detected ]
2.6.19-1.2288.fc5debug #1
---------------------------------------------
tcsh/4957 is trying to acquire lock:
(&(&ip->i_lock)->mr_lock){----}, at: [<ffffffff8816086e>] xfs_ilock+0x4f/0x74
[xfs]
but task is already holding lock:
(&(&ip->i_lock)->mr_lock){----}, at: [<ffffffff8816086e>] xfs_ilock+0x4f/0x74
[xfs]
other info that might help us debug this:
2 locks held by tcsh/4957:
#0: (&inode->i_mutex){--..}, at: [<ffffffff8021bd97>] open_namei+0xec/0x698
#1: (&(&ip->i_lock)->mr_lock){----}, at: [<ffffffff8816086e>]
xfs_ilock+0x4f/0x74 [xfs]
stack backtrace:
Call Trace:
[<ffffffff8026d9b9>] show_trace+0x34/0x47
[<ffffffff8026d9de>] dump_stack+0x12/0x17
[<ffffffff802a4a8f>] __lock_acquire+0x132/0x9d4
[<ffffffff802a58b6>] lock_acquire+0x48/0x63
[<ffffffff802a16f7>] down_write+0x34/0x3d
[<ffffffff8816086e>] :xfs:xfs_ilock+0x4f/0x74
[<ffffffff881612b9>] :xfs:xfs_iget+0x35c/0x7e3
[<ffffffff88175f6c>] :xfs:xfs_trans_iget+0xb4/0x128
[<ffffffff88164f3f>] :xfs:xfs_ialloc+0x9e/0x47d
[<ffffffff88176954>] :xfs:xfs_dir_ialloc+0x84/0x2cc
[<ffffffff8817ca5d>] :xfs:xfs_create+0x321/0x634
[<ffffffff88185633>] :xfs:xfs_vn_mknod+0x1b7/0x3c4
[<ffffffff8023c2cc>] vfs_create+0x101/0x174
[<ffffffff8021be47>] open_namei+0x19c/0x698
[<ffffffff80228fb2>] do_filp_open+0x1c/0x38
[<ffffffff8021a9d4>] do_sys_open+0x44/0xbe
[<ffffffff8025f11e>] system_call+0x7e/0x83
[<00000034b3fbdb02>]
and
Feb 21 09:44:49 apapane kernel: [ INFO: possible recursive locking detected ]
Feb 21 09:44:49 apapane kernel: 2.6.19-1.2288.fc5debug #1
Feb 21 09:44:49 apapane kernel: ---------------------------------------------
Feb 21 09:44:49 apapane kernel: mkdir/4813 is trying to acquire lock:
Feb 21 09:44:49 apapane kernel: (&(&ip->i_lock)->mr_lock){----}, at:
[<ffffffff8816086e>
] xfs_ilock+0x4f/0x74 [xfs]
Feb 21 09:44:49 apapane kernel:
Feb 21 09:44:49 apapane kernel: but task is already holding lock:
Feb 21 09:44:49 apapane kernel: (&(&ip->i_lock)->mr_lock){----}, at:
[<ffffffff8816086e>
] xfs_ilock+0x4f/0x74 [xfs]
Feb 21 09:44:49 apapane kernel:
Feb 21 09:44:49 apapane kernel: other info that might help us debug this:
Feb 21 09:44:49 apapane kernel: 2 locks held by mkdir/4813:
Feb 21 09:44:49 apapane kernel: #0: (&inode->i_mutex/1){--..}, at:
[<ffffffff80258ca5>]
lookup_create+0x23/0x84
Feb 21 09:44:49 apapane kernel: #1: (&(&ip->i_lock)->mr_lock){----}, at:
[<ffffffff8816
086e>] xfs_ilock+0x4f/0x74 [xfs]
Feb 21 09:44:49 apapane kernel:
Feb 21 09:44:49 apapane kernel: stack backtrace:
Feb 21 09:44:49 apapane kernel:
Feb 21 09:44:49 apapane kernel: Call Trace:
Feb 21 09:44:49 apapane kernel: [<ffffffff8026d9b9>] show_trace+0x34/0x47
Feb 21 09:44:49 apapane kernel: [<ffffffff8026d9de>] dump_stack+0x12/0x17
Feb 21 09:44:49 apapane kernel: [<ffffffff802a4a8f>] __lock_acquire+0x132/0x9d4
Feb 21 09:44:49 apapane kernel: [<ffffffff802a58b6>] lock_acquire+0x48/0x63
Feb 21 09:44:49 apapane kernel: [<ffffffff802a16f7>] down_write+0x34/0x3d
Feb 21 09:44:49 apapane kernel: [<ffffffff8816086e>] :xfs:xfs_ilock+0x4f/0x74
Feb 21 09:44:49 apapane kernel: [<ffffffff881612b9>] :xfs:xfs_iget+0x35c/0x7e3
Feb 21 09:44:49 apapane kernel: [<ffffffff88175f6c>]
:xfs:xfs_trans_iget+0xb4/0x128
Feb 21 09:44:49 apapane kernel: [<ffffffff88164f3f>] :xfs:xfs_ialloc+0x9e/0x47d
Feb 21 09:44:49 apapane kernel: [<ffffffff88176954>]
:xfs:xfs_dir_ialloc+0x84/0x2cc
Feb 21 09:44:49 apapane kernel: [<ffffffff8817d8df>] :xfs:xfs_mkdir+0x314/0x672
Feb 21 09:44:49 apapane kernel: [<ffffffff88185659>]
:xfs:xfs_vn_mknod+0x1dd/0x3c4
Feb 21 09:44:49 apapane kernel: [<ffffffff802df28d>] vfs_mkdir+0xf7/0x168
Feb 21 09:44:49 apapane kernel: [<ffffffff802df786>] sys_mkdirat+0x97/0xd8
Feb 21 09:44:49 apapane kernel: [<ffffffff8025f11e>] system_call+0x7e/0x83
Feb 21 09:44:49 apapane kernel: [<00000034b3fbd917>]
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