linux-kernel - [2.6.19-rc4] "possible recursive locking detected" in reiserfs_xattr

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Message-ID: <454B6A64.1000107@imap.cc>
Date:	Fri, 03 Nov 2006 17:12:20 +0100
From:	Tilman Schmidt <tilman@...p.cc>
To:	LKML <linux-kernel@...r.kernel.org>
Subject: [2.6.19-rc4] "possible recursive locking detected" in reiserfs_xattr_set

JFTR, these messages still appear with 2.6.19-rc4:

Nov  3 11:08:05 gx110 kernel: [ 1025.512025]
Nov  3 11:08:05 gx110 kernel: [ 1025.512031] =============================================
Nov  3 11:08:05 gx110 kernel: [ 1025.512053] [ INFO: possible recursive locking detected ]
Nov  3 11:08:05 gx110 kernel: [ 1025.512064] 2.6.19-rc4-noinitrd #1
Nov  3 11:08:05 gx110 kernel: [ 1025.512071] ---------------------------------------------
Nov  3 11:08:05 gx110 kernel: [ 1025.512080] kdm/3234 is trying to acquire lock:
Nov  3 11:08:05 gx110 kernel: [ 1025.512089]  (&inode->i_mutex){--..}, at: [<c035aced>] mutex_lock+0x1c/0x1f
Nov  3 11:08:05 gx110 kernel: [ 1025.512124]
Nov  3 11:08:05 gx110 kernel: [ 1025.512126] but task is already holding lock:
Nov  3 11:08:05 gx110 kernel: [ 1025.512134]  (&inode->i_mutex){--..}, at: [<c035aced>] mutex_lock+0x1c/0x1f
Nov  3 11:08:05 gx110 kernel: [ 1025.512152]
Nov  3 11:08:05 gx110 kernel: [ 1025.512155] other info that might help us debug this:
Nov  3 11:08:05 gx110 kernel: [ 1025.512165] 3 locks held by kdm/3234:
Nov  3 11:08:05 gx110 kernel: [ 1025.512172]  #0:  (&inode->i_mutex){--..}, at: [<c035aced>] mutex_lock+0x1c/0x1f
Nov  3 11:08:05 gx110 kernel: [ 1025.512192]  #1:  (&REISERFS_I(inode)->xattr_sem){----}, at: [<c01c3951>] reiserfs_acl_chmod+0xe1/0x180
Nov  3 11:08:05 gx110 kernel: [ 1025.512234]  #2:  (&REISERFS_SB(s)->xattr_dir_sem){----}, at: [<c01c3986>] reiserfs_acl_chmod+0x116/0x180
Nov  3 11:08:05 gx110 kernel: [ 1025.512257]
Nov  3 11:08:05 gx110 kernel: [ 1025.512260] stack backtrace:
Nov  3 11:08:05 gx110 kernel: [ 1025.512274]  [<c0103dc4>] dump_trace+0x64/0x1cc
Nov  3 11:08:05 gx110 kernel: [ 1025.512300]  [<c0103f45>] show_trace_log_lvl+0x19/0x2e
Nov  3 11:08:05 gx110 kernel: [ 1025.512317]  [<c01042a2>] show_trace+0x12/0x14
Nov  3 11:08:05 gx110 kernel: [ 1025.512334]  [<c01042bb>] dump_stack+0x17/0x19
Nov  3 11:08:05 gx110 kernel: [ 1025.512348]  [<c012fdd9>] __lock_acquire+0x106/0x99c
Nov  3 11:08:05 gx110 kernel: [ 1025.512373]  [<c0130930>] lock_acquire+0x5b/0x7b
Nov  3 11:08:05 gx110 kernel: [ 1025.512457]  [<c035ab5d>] __mutex_lock_slowpath+0xc6/0x23a
Nov  3 11:08:05 gx110 kernel: [ 1025.512482]  [<c035aced>] mutex_lock+0x1c/0x1f
Nov  3 11:08:05 gx110 kernel: [ 1025.512504]  [<c01c29c5>] reiserfs_xattr_set+0xe4/0x2bf
Nov  3 11:08:05 gx110 kernel: [ 1025.512529]  [<c01c33ef>] reiserfs_set_acl+0x18d/0x204
Nov  3 11:08:05 gx110 kernel: [ 1025.512553]  [<c01c3994>] reiserfs_acl_chmod+0x124/0x180
Nov  3 11:08:05 gx110 kernel: [ 1025.512577]  [<c01a3c41>] reiserfs_setattr+0x20b/0x243
Nov  3 11:08:05 gx110 kernel: [ 1025.512608]  [<c017395b>] notify_change+0x135/0x2c2
Nov  3 11:08:05 gx110 kernel: [ 1025.512645]  [<c015fbba>] sys_fchmodat+0xa0/0xca
Nov  3 11:08:05 gx110 kernel: [ 1025.512670]  [<c015fc05>] sys_chmod+0x21/0x23
Nov  3 11:08:05 gx110 kernel: [ 1025.512691]  [<c0102dfd>] sysenter_past_esp+0x56/0x8d
Nov  3 11:08:05 gx110 kernel: [ 1025.512718] DWARF2 unwinder stuck at sysenter_past_esp+0x56/0x8d
Nov  3 11:08:05 gx110 kernel: [ 1025.512733]
Nov  3 11:08:05 gx110 kernel: [ 1025.512746] Leftover inexact backtrace:
Nov  3 11:08:05 gx110 kernel: [ 1025.512750]
Nov  3 11:08:05 gx110 kernel: [ 1025.512771]  =======================

The message appears when the first KDE session is started.

Possibly relevant system info:

ts@...10:~> uname -a
Linux gx110 2.6.19-rc4-noinitrd #1 PREEMPT Fri Nov 3 02:47:33 CET 2006 i686 i686 i386 GNU/Linux
ts@...10:~> fgrep REISER /boot/config-2.6.19-rc4-noinitrd
CONFIG_REISERFS_FS=y
# CONFIG_REISERFS_CHECK is not set
CONFIG_REISERFS_PROC_INFO=y
CONFIG_REISERFS_FS_XATTR=y
CONFIG_REISERFS_FS_POSIX_ACL=y
CONFIG_REISERFS_FS_SECURITY=y
ts@...10:~> mount
/dev/hda3 on / type reiserfs (rw,acl,user_xattr)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
tmpfs on /dev/shm type tmpfs (rw)
devpts on /dev/pts type devpts (rw,mode=0620,gid=5)
/dev/hda1 on /windows/C type ntfs (ro)
/dev/hda4 on /windows/D type vfat (rw)
usbfs on /proc/bus/usb type usbfs (rw)

HTH

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