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Date: Fri, 5 Nov 2010 13:14:43 +0200
From: Sergey Senozhatsky <sergey.senozhatsky@...il.com>
To: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Markus Trippelsdorf <markus@...ppelsdorf.de>,
Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
Oleg Nesterov <oleg@...hat.com>,
KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
Roland McGrath <roland@...hat.com>,
David Howells <dhowells@...hat.com>,
linux-kernel@...r.kernel.org,
Marcelo Tosatti <mtosatti@...hat.com>,
Ingo Molnar <mingo@...e.hu>,
Thomas Gleixner <tglx@...utronix.de>
Subject: Re: task blocked for more than 120 seconds
On (11/04/10 18:32), Peter Zijlstra wrote:
> Subject: sched: Fixup cross sched_class wakeup preemption
> From: Peter Zijlstra <a.p.zijlstra@...llo.nl>
> Date: Sun Oct 31 12:37:04 CET 2010
>
> Instead of dealing with sched classes inside each check_preempt_curr()
> implementation, pull out this logic into the generic wakeup preemption
> path.
>
> This fixes a hang in KVM (and others) where we are waiting for the
> stop machine thread to run..
>
Hello,
Peter, patch seems to work.
Tested-by: Sergey Senozhatsky <sergey.senozhatsky@...il.com>
Sergey
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