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Subject: Re: select_task_rq_fair: WARNING: at kernel/lockdep.c
 match_held_lock
From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>,
        Andrew Morton <akpm@linux-foundation.org>,
        linux-kernel@vger.kernel.org,
        KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>, linux-mm@kvack.org
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Date: Thu, 04 Aug 2011 17:47:47 +0200
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On Thu, 2011-08-04 at 18:37 +0300, Sergey Senozhatsky wrote:
> > > [  132.794685] WARNING: at kernel/lockdep.c:3117 match_held_lock+0xf6/0x12e()

Just to double check, that line is:

                if (DEBUG_LOCKS_WARN_ON(!hlock->nest_lock))

in your kernel source?