linux-kernel - Re: [tip:core/urgent] lockdep: Fix wrong assumption in match_held

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Message-ID: <20110810114850.GA3885@zhy>
Date:	Wed, 10 Aug 2011 19:48:50 +0800
From:	Yong Zhang <yong.zhang0@...il.com>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	mingo@...hat.com, hpa@...or.com, linux-kernel@...r.kernel.org,
	sergey.senozhatsky@...il.com, tglx@...utronix.de, mingo@...e.hu,
	linux-tip-commits@...r.kernel.org
Subject: Re: [tip:core/urgent] lockdep: Fix wrong assumption in
 match_held_lock

On Wed, Aug 10, 2011 at 07:45:50PM +0800, Yong Zhang wrote:
> On Wed, Aug 10, 2011 at 12:01:10PM +0200, Peter Zijlstra wrote:
> > On Wed, 2011-08-10 at 10:58 +0800, Yong Zhang wrote:
> > 
> > > > Link: http://lkml.kernel.org/r/1312547787.28695.2.camel@twins
> > > 
> > > BTW, I can't open this link.
> > 
> > Gah! I did mess that up, but I've no idea how though, I usually
> > copy/paste or let my script do it, in case of copy/paste one would
> > assume I picked the wrong msg, but a grep through my sent folder doesn't
> > find any email with that msgid.. and my script isn't imaginative enough
> > to  just make one up like that. Anyway:
> > 
> >   lkml.kernel.org/r/1312969382.23148.1.camel@...ns
> > 
> > should be the actual link, however that doesn't appear to work either,
> > included the relevant headers of the actual email:
> > 
> > ---
> > 
> > Subject: Re: select_task_rq_fair: WARNING: at kernel/lockdep.c match_held_lock
> > From: Peter Zijlstra <a.p.zijlstra@...llo.nl>
> > To: Sergey Senozhatsky <sergey.senozhatsky@...il.com>
> > Cc: Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>, 
> >  Andrew Morton <akpm@...ux-foundation.org>, linux-kernel@...r.kernel.org,
> >  KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>, linux-mm@...ck.org
> > Date: Fri, 05 Aug 2011 14:36:20 +0200
> > In-Reply-To: <20110804155347.GB3562@...rdfish.minsk.epam.com>
> > References: <20110804141306.GA3536@...rdfish.minsk.epam.com>
> >          <1312470358.16729.25.camel@...ns>
> >          <20110804153752.GA3562@...rdfish.minsk.epam.com>
> >          <1312472867.16729.38.camel@...ns>
> >          <20110804155347.GB3562@...rdfish.minsk.epam.com>
> > 
> > Message-ID: <1312969382.23148.1.camel@...ns>
> 
> The actual one showed in maillist is like below:

Hmm, you have mentioned it :)

> ---
> Subject: Re: select_task_rq_fair: WARNING: at kernel/lockdep.c
>  match_held_lock
> From: Peter Zijlstra <a.p.zijlstra@...llo.nl>
> To: Sergey Senozhatsky <sergey.senozhatsky@...il.com>
> Cc: Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
>         Andrew Morton <akpm@...ux-foundation.org>,
>         linux-kernel@...r.kernel.org,
>         KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
>         linux-mm@...ck.org
> Date: Fri, 05 Aug 2011 14:36:20 +0200
> In-Reply-To: <20110804155347.GB3562@...rdfish.minsk.epam.com>
> References: <20110804141306.GA3536@...rdfish.minsk.epam.com>
>          <1312470358.16729.25.camel@...ns>
>          <20110804153752.GA3562@...rdfish.minsk.epam.com>
>          <1312472867.16729.38.camel@...ns>
>          <20110804155347.GB3562@...rdfish.minsk.epam.com>
> Content-Type: text/plain; charset="UTF-8"
> Content-Transfer-Encoding: 8BIT
> X-Mailer: Evolution 3.0.2- 
> Message-ID: <1312547780.28695.1.camel@...ns>
> ---
> 
> Not sure how the difference happens.
> 
> Thanks,
> Yong
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