linux-kernel - Re: possible recursive locking detected at kmem_cache

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Message-ID: <84144f020906261042g735938f1n77f1983649a0aac0@mail.gmail.com>
Date:	Fri, 26 Jun 2009 20:42:38 +0300
From:	Pekka Enberg <penberg@...helsinki.fi>
To:	"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"rjw@...k.pl" <rjw@...k.pl>, "mingo@...e.hu" <mingo@...e.hu>,
	"cl@...ux-foundation.org" <cl@...ux-foundation.org>,
	"npiggin@...e.de" <npiggin@...e.de>,
	"a.p.zijlstra@...llo.nl" <a.p.zijlstra@...llo.nl>
Subject: Re: possible recursive locking detected at kmem_cache_free

On Fri, Jun 26, 2009 at 7:58 PM, Pallipadi,
Venkatesh<venkatesh.pallipadi@...el.com> wrote:
> On Fri, 2009-06-26 at 00:37 -0700, Pekka J Enberg wrote:
>> Hi Venki,
>>
>> On Thu, 25 Jun 2009, Pallipadi, Venkatesh wrote:
>> > > > Not sure if this has been reported elsewhere. I started seeing this with git
>> > > > kernel from this morning on a system with RedHat EL5 base installation with
>> > > > ext3 root file system. Attached is the config I am using.
>> > > >
>> > > > Let me know if you need any more details. This seems to be at every boot. I
>> > > > am trying the bisect right now.
>> > > >
>> > >
>> > > Thanks.  Let's cc Pekka.
>> > >
>> >
>> > git bisect result.
>>
>> Thanks! I think I just broke lockdep annotations for slab. Does this patch
>> fix things?
>>
>
> Yes. This patch helps.

OK, thanks for testing, Venki! I'll merge this to slab.git first thing
on Monday.

                           Pekka
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