lkml.org 
[lkml]   [2009]   [Sep]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 0/4] kill-the-bkl/reiserfs: fix some lock dependency inversions
On Tue, Sep 15, 2009 at 01:33:42AM +0400, Alexander Beregalov wrote:
> > Hi Alexander,
> >
> > It should be fixed now, still in the following tree:
>
> Hi!
> Another one, similar:
> It is v2.6.31-3123-g99bc470 plus your 805031859(kill-the-bkl/reiserfs:
> panic in case of lock imbalance), UP.
>
> =======================================================
> [ INFO: possible circular locking dependency detected ]
> 2.6.31-03149-gdcc030a #1
> -------------------------------------------------------
> udevadm/716 is trying to acquire lock:
> (&mm->mmap_sem){++++++}, at: [<c107249a>] might_fault+0x4a/0xa0



I hate this mm->mmap_sem....



>
> but task is already holding lock:
> (sysfs_mutex){+.+.+.}, at: [<c10cb9aa>] sysfs_readdir+0x5a/0x200
>
> which lock already depends on the new lock.



This is really weird. This is two externals locks from reiserfs.
I guess I created this dependency somewhere, but how...

Anyway, someone reported a similar bug with this tree some months ago,
I've even met it once but could never be able to reproduce it anymore.

I'll try to find out. Thanks!



\
 
 \ /
  Last update: 2009-09-14 23:53    [W:1.706 / U:0.036 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site