linux-kernel - Re: [PATCH] x86: Simplify cpu_idle

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Message-ID: <20080208184501.GA6847@basil.nowhere.org>
Date:	Fri, 8 Feb 2008 19:45:01 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Venki Pallipadi <venkatesh.pallipadi@...el.com>
Cc:	Andi Kleen <ak@...e.de>, Andrew Morton <akpm@...ux-foundation.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	"Brown, Len" <len.brown@...el.com>, Adam Belay <abelay@...ell.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: [PATCH] x86: Simplify cpu_idle_wait

On Fri, Feb 08, 2008 at 09:24:30AM -0800, Venki Pallipadi wrote:
> On Fri, Feb 08, 2008 at 11:28:48AM +0100, Andi Kleen wrote:
> > 
> > > -	set_cpus_allowed(current, tmp);
> > > +	smp_mb();
> > > +	/* kick all the CPUs so that they exit out of pm_idle */
> > > +	smp_call_function(do_nothing, NULL, 0, 0);
> > 
> > I think the last argument (wait) needs to be 1 to make sure it is 
> > synchronous (for 32/64) Otherwise the patch looks great.
> 
> Yes. Below is the updated patch

Acked-by: Andi Kleen <ak@...e.de>

-Andi

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