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Date:	Tue, 31 May 2011 05:26:24 +0200
From:	Mike Galbraith <>
To:	Hillf Danton <>
Cc:	Steven Rostedt <>,
	LKML <>, Ingo Molnar <>,
	Peter Zijlstra <>,
	Yong Zhang <>
Subject: Re: [PATCH] sched: fix need_resched() when checking peempt

On Tue, 2011-05-24 at 21:50 +0800, Hillf Danton wrote:
> On Tue, May 24, 2011 at 9:39 PM, Steven Rostedt <> wrote:
> > On Tue, 2011-05-24 at 21:27 +0800, Hillf Danton wrote:
> >> When checking if current task could be preempted by a newly woken task,
> >> further check could be bypassed if the current thread is different from
> >> the current task of run-queue, and it is corrected accordingly.
> >
> > Ug, that change log is an obfuscated mess. But looking at the actual
> > patch, I figured what you wanted to say. How about this:
> >
> > ----
> > The RT preempt check tests the wrong task if NEED_RESCHED is set. It
> > currently checks the local CPU task. It is suppose to check the task
> > that is running on the run queue we are about to wake another task on.
> > ----
> >
> Thanks, it is great changelog:)

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