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From: Ingo Molnar <mingo@elte.hu>
To: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Dave Young <hidave.darkstar@gmail.com>,
	linux-kernel@vger.kernel.org,
	Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>
Subject: Re: [PATCH] sched: don't take a mutex from interrupt context
Date: Tue, 22 Jan 2008 18:07:00 +0100	[thread overview]
Message-ID: <20080122170700.GA6245@elte.hu> (raw)
In-Reply-To: <1201019138.6341.24.camel@lappy>


* Peter Zijlstra <a.p.zijlstra@chello.nl> wrote:

> > WARNING: at kernel/mutex.c:134 mutex_lock_nested+0x277/0x290()

> Subject: sched: don't take a mutex from interrupt context
> 
> print_cfs_stats is callable from interrupt context (sysrq), hence it 
> should not take mutexes. Change it to use RCU since the task group 
> data is RCU freed anyway.

thanks Peter, applied this to sched-devel.git.

	Ingo

      parent reply	other threads:[~2008-01-22 17:07 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-01-22  2:36 WARNING: at kernel/mutex.c:134 Dave Young
2008-01-22 16:25 ` [PATCH] sched: don't take a mutex from interrupt context Peter Zijlstra
2008-01-22 16:51   ` Srivatsa Vaddagiri
2008-01-22 16:47     ` Peter Zijlstra
2008-01-22 17:23       ` Srivatsa Vaddagiri
2008-01-22 17:07   ` Ingo Molnar [this message]

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