linux-kernel - Re: [PATCH 3/4 UPDATED] scheduler: replace migration_thread with cpu

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Message-ID: <4BE3A3F0.3000906@kernel.org>
Date:	Fri, 07 May 2010 07:24:00 +0200
From:	Tejun Heo <tj@...nel.org>
To:	paulmck@...ux.vnet.ibm.com
CC:	mingo@...e.hu, peterz@...radead.org, linux-kernel@...r.kernel.org,
	Dipankar Sarma <dipankar@...ibm.com>,
	Josh Triplett <josh@...edesktop.org>,
	Oleg Nesterov <oleg@...hat.com>,
	Dimitri Sivanich <sivanich@....com>
Subject: Re: [PATCH 3/4 UPDATED] scheduler: replace migration_thread with
 cpu_stop

> And of course, I overdid it in my patch when I removed smp_mb() from
> the !SMP version of synchronize_sched_expedited().  :-/
> 
> If synchronize_sched_expedited() is ever to be invoked from within
> kernel/sched.c in a UP kernel, there needs to be a "barrier()" in the
> !SMP version.  So please see the following patch.

Thanks.  Pushed.

-- 
tejun
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