From: Ingo Molnar <mingo@elte.hu>
To: Alexander Beregalov <a.beregalov@gmail.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
linux-next@vger.kernel.org, linux-mm@kvack.org
Subject: Re: next-0704: WARNING: at kernel/sched.c:4254 add_preempt_count; PANIC
Date: Mon, 7 Jul 2008 08:35:19 +0200 [thread overview]
Message-ID: <20080707063519.GE23583@elte.hu> (raw)
In-Reply-To: <487159DA.708@gmail.com>
* Alexander Beregalov <a.beregalov@gmail.com> wrote:
> Hi
>
> WARNING: at kernel/sched.c:4254 add_preempt_count+0x61/0x63()
> Modules linked in: i2c_nforce2
> Pid: 3620, comm: rtorrent Not tainted 2.6.26-rc8-next-20080704 #5
this warning is what triggers:
#ifdef CONFIG_DEBUG_PREEMPT
/*
* Underflow?
*/
if (DEBUG_LOCKS_WARN_ON((preempt_count() < 0)))
return;
i.e. preempt counter underflow. That can happen either due to unbalanced
preempt_disable()/preempt_enable() pairs, or can happen due to stack
overflow/corruption.
Ingo
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next prev parent reply other threads:[~2008-07-07 6:35 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-07-06 23:48 Alexander Beregalov
2008-07-07 6:23 ` Alexander Beregalov
2008-07-07 6:35 ` Ingo Molnar [this message]
2008-07-07 7:32 ` Vegard Nossum
2008-07-07 7:46 ` Alexander Beregalov
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