Re: Linux v2.6.18-rc1/reiserfs INFO: possible recursive locking detected

[Tilman Schmidt <tilman@imap.cc>]

On 07.07.2006 08:33, Arjan van de Ven wrote:
> hmm interesting; reiserfs seems to have another locking level layer for
> the i_mutex due to the xattrs-are-a-directory thing.
> 
> Can you try this patch below and see if that fixes it?

The message is still there, but the details changed a bit:

> Jul  7 19:15:48 gx110 kernel: [  125.840979]
> Jul  7 19:15:48 gx110 kernel: [  125.840984] =============================================
> Jul  7 19:15:48 gx110 kernel: [  125.841003] [ INFO: possible recursive locking detected ]
> Jul  7 19:15:48 gx110 kernel: [  125.841012] ---------------------------------------------
> Jul  7 19:15:48 gx110 kernel: [  125.841021] kdm/3242 is trying to acquire lock:
> Jul  7 19:15:48 gx110 kernel: [  125.841030]  (&inode->i_mutex){--..}, at: [<c033c73a>] mutex_lock+0x1c/0x1f
> Jul  7 19:15:48 gx110 kernel: [  125.841077]
> Jul  7 19:15:48 gx110 kernel: [  125.841079] but task is already holding lock:
> Jul  7 19:15:48 gx110 kernel: [  125.841087]  (&inode->i_mutex){--..}, at: [<c033c73a>] mutex_lock+0x1c/0x1f
> Jul  7 19:15:48 gx110 kernel: [  125.841105]
> Jul  7 19:15:48 gx110 kernel: [  125.841107] other info that might help us debug this:
> Jul  7 19:15:48 gx110 kernel: [  125.841117] 3 locks held by kdm/3242:
> Jul  7 19:15:48 gx110 kernel: [  125.841123]  #0:  (&inode->i_mutex){--..}, at: [<c033c73a>] mutex_lock+0x1c/0x1f
> Jul  7 19:15:48 gx110 kernel: [  125.841143]  #1:  (&REISERFS_I(inode)->xattr_sem){----}, at: [<c01bcb36>] reiserfs_acl_chmod+0xe0/0x182
> Jul  7 19:15:48 gx110 kernel: [  125.841175]  #2:  (&REISERFS_SB(s)->xattr_dir_sem){----}, at: [<c01bcb6b>] reiserfs_acl_chmod+0x115/0x182
> Jul  7 19:15:48 gx110 kernel: [  125.841197]
> Jul  7 19:15:48 gx110 kernel: [  125.841199] stack backtrace:
> Jul  7 19:15:48 gx110 kernel: [  125.841919]  [<c0103f4d>] show_trace_log_lvl+0x54/0xfd
> Jul  7 19:15:48 gx110 kernel: [  125.841975]  [<c010504d>] show_trace+0xd/0x10
> Jul  7 19:15:48 gx110 kernel: [  125.842022]  [<c0105067>] dump_stack+0x17/0x1c
> Jul  7 19:15:48 gx110 kernel: [  125.842067]  [<c012e3fa>] __lock_acquire+0x758/0x9bf
> Jul  7 19:15:48 gx110 kernel: [  125.842314]  [<c012e93e>] lock_acquire+0x5e/0x80
> Jul  7 19:15:48 gx110 kernel: [  125.842550]  [<c033c5b7>] __mutex_lock_slowpath+0xa7/0x20e
> Jul  7 19:15:48 gx110 kernel: [  125.842846]  [<c033c73a>] mutex_lock+0x1c/0x1f
> Jul  7 19:15:48 gx110 kernel: [  125.843074]  [<c01bbbb8>] reiserfs_xattr_set+0xe0/0x2bc
> Jul  7 19:15:48 gx110 kernel: [  125.844327]  [<c01bc5d6>] reiserfs_set_acl+0x187/0x200
> Jul  7 19:15:48 gx110 kernel: [  125.844957]  [<c01bcb79>] reiserfs_acl_chmod+0x123/0x182
> Jul  7 19:15:48 gx110 kernel: [  125.845581]  [<c019ddab>] reiserfs_setattr+0x218/0x250
> Jul  7 19:15:48 gx110 kernel: [  125.846168]  [<c0174619>] notify_change+0x135/0x2c0
> Jul  7 19:15:48 gx110 kernel: [  125.846637]  [<c015b25a>] sys_fchmodat+0x9c/0xc3
> Jul  7 19:15:48 gx110 kernel: [  125.847032]  [<c015b293>] sys_chmod+0x12/0x14
> Jul  7 19:15:48 gx110 kernel: [  125.847413]  [<c0102cbd>] sysenter_past_esp+0x56/0x8d

Thanks,
Tilman

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

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