[2.6.18] INFO: possible recursive locking detected

[2.6.18] INFO: possible recursive locking detected

[Tilman Schmidt]

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I am getting this in my syslog during system startup:

Sep 22 16:11:07 gx110 kernel: [  227.330838]
Sep 22 16:11:07 gx110 kernel: [  227.330844] =============================================
Sep 22 16:11:07 gx110 kernel: [  227.330867] [ INFO: possible recursive locking detected ]
Sep 22 16:11:07 gx110 kernel: [  227.330876] ---------------------------------------------
Sep 22 16:11:07 gx110 kernel: [  227.330885] kdm/3153 is trying to acquire lock:
Sep 22 16:11:07 gx110 kernel: [  227.330895]  (&inode->i_mutex){--..}, at: [<c03388cc>] mutex_lock+0x1c/0x1f
Sep 22 16:11:07 gx110 kernel: [  227.330943]
Sep 22 16:11:07 gx110 kernel: [  227.330945] but task is already holding lock:
Sep 22 16:11:07 gx110 kernel: [  227.330953]  (&inode->i_mutex){--..}, at: [<c03388cc>] mutex_lock+0x1c/0x1f
Sep 22 16:11:07 gx110 kernel: [  227.330971]
Sep 22 16:11:07 gx110 kernel: [  227.330973] other info that might help us debug this:
Sep 22 16:11:07 gx110 kernel: [  227.330983] 3 locks held by kdm/3153:
Sep 22 16:11:07 gx110 kernel: [  227.330990]  #0:  (&inode->i_mutex){--..}, at: [<c03388cc>] mutex_lock+0x1c/0x1f
Sep 22 16:11:07 gx110 kernel: [  227.331010]  #1:  (&REISERFS_I(inode)->xattr_sem){----}, at: [<c01ba985>] reiserfs_acl_chmod+0xe1/0x180
Sep 22 16:11:07 gx110 kernel: [  227.331041]  #2:  (&REISERFS_SB(s)->xattr_dir_sem){----}, at: [<c01ba9ba>] reiserfs_acl_chmod+0x116/0x180
Sep 22 16:11:07 gx110 kernel: [  227.331064]
Sep 22 16:11:07 gx110 kernel: [  227.331066] stack backtrace:
Sep 22 16:11:07 gx110 kernel: [  227.331779]  [<c0103fa9>] show_trace_log_lvl+0x58/0x16f
Sep 22 16:11:07 gx110 kernel: [  227.331839]  [<c0105106>] show_trace+0xd/0x10
Sep 22 16:11:07 gx110 kernel: [  227.331886]  [<c0105120>] dump_stack+0x17/0x1b
Sep 22 16:11:07 gx110 kernel: [  227.332006]  [<c012d8b1>] __lock_acquire+0x74a/0x9a7
Sep 22 16:11:07 gx110 kernel: [  227.332257]  [<c012dd90>] lock_acquire+0x4a/0x6a
Sep 22 16:11:07 gx110 kernel: [  227.332498]  [<c0338749>] __mutex_lock_slowpath+0xa7/0x20e
Sep 22 16:11:07 gx110 kernel: [  227.332729]  [<c03388cc>] mutex_lock+0x1c/0x1f
Sep 22 16:11:07 gx110 kernel: [  227.332956]  [<c01b9a26>] reiserfs_xattr_set+0xda/0x2b0
Sep 22 16:11:07 gx110 kernel: [  227.334209]  [<c01ba425>] reiserfs_set_acl+0x184/0x1fd
Sep 22 16:11:07 gx110 kernel: [  227.334832]  [<c01ba9c8>] reiserfs_acl_chmod+0x124/0x180
Sep 22 16:11:07 gx110 kernel: [  227.335454]  [<c019bfdf>] reiserfs_setattr+0x20b/0x243
Sep 22 16:11:07 gx110 kernel: [  227.336037]  [<c0173011>] notify_change+0x135/0x2bc
Sep 22 16:11:07 gx110 kernel: [  227.336506]  [<c015a2e1>] sys_fchmodat+0x9f/0xc6
Sep 22 16:11:07 gx110 kernel: [  227.336901]  [<c015a31a>] sys_chmod+0x12/0x14
Sep 22 16:11:07 gx110 kernel: [  227.337282]  [<c0102d15>] sysenter_past_esp+0x56/0x8d
Sep 22 16:11:07 gx110 kernel: [  227.337323] DWARF2 unwinder stuck at sysenter_past_esp+0x56/0x8d
Sep 22 16:11:07 gx110 kernel: [  227.337339] Leftover inexact backtrace:
Sep 22 16:11:07 gx110 kernel: [  227.337354]  [<c0105106>] show_trace+0xd/0x10
Sep 22 16:11:07 gx110 kernel: [  227.337373]  [<c0105120>] dump_stack+0x17/0x1b
Sep 22 16:11:07 gx110 kernel: [  227.337393]  [<c012d8b1>] __lock_acquire+0x74a/0x9a7
Sep 22 16:11:07 gx110 kernel: [  227.337411]  [<c012dd90>] lock_acquire+0x4a/0x6a
Sep 22 16:11:07 gx110 kernel: [  227.337429]  [<c0338749>] __mutex_lock_slowpath+0xa7/0x20e
Sep 22 16:11:07 gx110 kernel: [  227.337455]  [<c03388cc>] mutex_lock+0x1c/0x1f
Sep 22 16:11:07 gx110 kernel: [  227.337474]  [<c01b9a26>] reiserfs_xattr_set+0xda/0x2b0
Sep 22 16:11:07 gx110 kernel: [  227.337492]  [<c01ba425>] reiserfs_set_acl+0x184/0x1fd
Sep 22 16:11:07 gx110 kernel: [  227.337511]  [<c01ba9c8>] reiserfs_acl_chmod+0x124/0x180
Sep 22 16:11:07 gx110 kernel: [  227.337530]  [<c019bfdf>] reiserfs_setattr+0x20b/0x243
Sep 22 16:11:07 gx110 kernel: [  227.337550]  [<c0173011>] notify_change+0x135/0x2bc
Sep 22 16:11:07 gx110 kernel: [  227.337569]  [<c015a2e1>] sys_fchmodat+0x9f/0xc6
Sep 22 16:11:07 gx110 kernel: [  227.337588]  [<c015a31a>] sys_chmod+0x12/0x14
Sep 22 16:11:07 gx110 kernel: [  227.337606]  [<c0102d15>] sysenter_past_esp+0x56/0x8d

ts@gx110:~> uname -a
Linux gx110 2.6.18-noinitrd #2 PREEMPT Thu Sep 21 23:34:08 CEST 2006 i686 i686 i386 GNU/Linux

Hardware: Dell OptiPlex GX110, Intel Pentium III, 933 MHz, 512 MB RAM,
i810 chipset, 60 GB ATA DISK drive, single 30 GB ReiserFS partition
for Linux
Software: SuSE Linux 10.0 Professional with current patches plus
self-compiled kernel 2.6.18

HTH
Tilman

-- 
Tilman Schmidt                          E-Mail: tilman@imap.cc
Bonn, Germany
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