linux-kernel - Re: [RFC/PATCH] PM / Sleep: Timer quiesce in freeze state

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Message-ID: <20141028082547.GO3337@twins.programming.kicks-ass.net>
Date:	Tue, 28 Oct 2014 09:25:47 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	"Li, Aubrey" <aubrey.li@...ux.intel.com>
Cc:	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	"Brown, Len" <len.brown@...el.com>,
	"alan@...ux.intel.com" <alan@...ux.intel.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>, linux-kernel@...r.kernel.org,
	"linux-pm@...r.kernel.org >> Linux PM list" 
	<linux-pm@...r.kernel.org>
Subject: Re: [RFC/PATCH] PM / Sleep: Timer quiesce in freeze state

On Tue, Oct 28, 2014 at 12:39:53PM +0800, Li, Aubrey wrote:

> > Now I suppose the problem is with cpu_pause() which needs IPIs to
> > complete? 
> 
> Yes, cpu_pause() will invoke smp IPI functions which need interrupt is
> enabled. So I changed irq ops like above. Actually, I have an early
> version to move cpuidle_pause()/cpuidle_resume() out of stop_machine(),
> that might be a better solution?

I think you can simply remove them altogether, they're nonsense.
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