Bug 39342

Summary: [3.0.0-rc6-git7] possible recursive locking at cache_alloc_refill
Product: Memory Management Reporter: Maciej Rutecki (maciej.rutecki)
Component: OtherAssignee: Andrew Morton (akpm)
Status: CLOSED CODE_FIX    
Severity: normal CC: dheeraj.reddy, florian, maciej.rutecki, penguin-kernel, rjw
Priority: P1    
Hardware: All   
OS: Linux   
Kernel Version: 3.0.0-rc6-git7 Subsystem:
Regression: Yes Bisected commit-id:
Bug Depends on:    
Bug Blocks: 36912    
Attachments: dmesg of the log
The respective .config

Description Maciej Rutecki 2011-07-14 08:07:01 UTC 
Subject    : [3.0.0-rc6-git7] possible recursive locking at cache_alloc_refill
Submitter  : Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Date       : 2011-07-11 12:37
Message-ID : 201107112137.FAD00545.SHtLOFOJOMFQFV@I-love.SAKURA.ne.jp
References : http://marc.info/?l=linux-kernel&m=131038788902151&w=2

This entry is being used for tracking a regression from 2.6.39. Please don't
close it until the problem is fixed in the mainline.
Comment 1 Florian Mickler 2011-08-15 08:55:51 UTC 
merged in v3.1-rc1:

commit 30765b92ada267c5395fc788623cb15233276f5c
Author: Peter Zijlstra <peterz@infradead.org>
Date:   Thu Jul 28 23:22:56 2011 +0200

    slab, lockdep: Annotate the locks before using them

commit 83835b3d9aec8e9f666d8223d8a386814f756266
Author: Peter Zijlstra <peterz@infradead.org>
Date:   Fri Jul 22 15:26:05 2011 +0200

    slab, lockdep: Annotate slab -> rcu -> debug_object -> slab
Comment 2 Rafael J. Wysocki 2011-08-15 09:25:49 UTC 
On Monday, August 15, 2011, Tetsuo Handa wrote:
> Pekka Enberg wrote:
> > Tetsuio, did Peter's commit 30765b9 ("slab, lockdep: Annotate the locks 
> > before using them") and commit 83835b3 ("slab, lockdep: Annotate slab -> 
> > rcu -> debug_object -> slab") in Linus' git fix this for you?
> 
> Yes. Applying these two commits fixes this problem.
Comment 3 Dheeraj 2011-08-23 07:41:04 UTC 
(In reply to comment #2)
> On Monday, August 15, 2011, Tetsuo Handa wrote:
> > Pekka Enberg wrote:
> > > Tetsuio, did Peter's commit 30765b9 ("slab, lockdep: Annotate the locks 
> > > before using them") and commit 83835b3 ("slab, lockdep: Annotate slab -> 
> > > rcu -> debug_object -> slab") in Linus' git fix this for you?
> > 
> > Yes. Applying these two commits fixes this problem.

But probably not in all cases.. I have a machine in which 3.1-rc3 still shows
this issue.
Attached are the dmesg/.config

dheeraj
Comment 4 Dheeraj 2011-08-23 07:43:14 UTC 
Created attachment 69742 [details]
dmesg of the log
Comment 5 Dheeraj 2011-08-23 07:43:53 UTC 
Created attachment 69752 [details]
The respective .config