From: "Li, Aubrey" <aubrey.li@linux.intel.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>,
"Brown, Len" <len.brown@intel.com>,
"alan@linux.intel.com" <alan@linux.intel.com>,
Thomas Gleixner <tglx@linutronix.de>,
"H. Peter Anvin" <hpa@zytor.com>,
linux-kernel@vger.kernel.org,
"linux-pm@vger.kernel.org >> Linux PM list"
<linux-pm@vger.kernel.org>
Subject: Re: [RFC/PATCH] PM / Sleep: Timer quiesce in freeze state
Date: Tue, 28 Oct 2014 12:32:16 +0800 [thread overview]
Message-ID: <544F1C50.8010505@linux.intel.com> (raw)
In-Reply-To: <20141027072816.GD10501@worktop.programming.kicks-ass.net>
On 2014/10/27 15:28, Peter Zijlstra wrote:
> On Mon, Oct 27, 2014 at 02:27:27PM +0800, Li, Aubrey wrote:
>>> Now I suppose the problem is with cpu_pause() which needs IPIs to
>>> complete? Do we really need cpuidle_pause() there?
>>> cpuidle_uninstall_handlers() seems like a daft thing to call just about
>>> there.
>>
>> Please check the log of 8651f97bd951d0bb1c10fa24e3fa3455193f3548.
>> Rafael should know more this question than me.
>
> That changelog explains its complete bollocks to do it here. We _want_
> to enter and/or remain in deep idle states.
cpuidle_resume() will be called at the end of dpm_resume_noirq(). So we
still are able to enter deep idle states after resume.
Thanks,
-Aubrey
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>
next prev parent reply other threads:[~2014-10-28 4:32 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-21 15:15 [RFC/PATCH] PM / Sleep: Timer quiesce in freeze state Li, Aubrey
2014-10-24 15:36 ` Peter Zijlstra
2014-10-27 6:27 ` Li, Aubrey
2014-10-27 7:28 ` Peter Zijlstra
2014-10-28 4:32 ` Li, Aubrey [this message]
2014-10-28 8:29 ` Peter Zijlstra
2014-10-28 22:46 ` Li, Aubrey
2014-10-29 8:21 ` Peter Zijlstra
2014-10-29 15:09 ` Li, Aubrey
2014-10-27 7:44 ` Peter Zijlstra
2014-10-28 7:52 ` Li, Aubrey
2014-10-28 8:25 ` Peter Zijlstra
2014-10-28 23:22 ` Li, Aubrey
2014-10-29 8:24 ` Peter Zijlstra
2014-10-30 2:58 ` [PATCH v2] " Li, Aubrey
2014-11-08 2:05 ` Rafael J. Wysocki
2014-11-10 11:49 ` Peter Zijlstra
2014-11-12 21:09 ` Thomas Gleixner
2014-11-13 1:37 ` Peter Zijlstra
2014-11-13 2:20 ` Li, Aubrey
2014-11-13 9:19 ` Thomas Gleixner
2014-11-13 10:50 ` Li, Aubrey
2014-11-13 9:10 ` Thomas Gleixner
2014-11-13 10:47 ` Li, Aubrey
2014-11-13 13:06 ` Thomas Gleixner
2014-11-14 7:58 ` Li, Aubrey
2014-10-28 4:39 ` [RFC/PATCH] " Li, Aubrey
2014-10-28 8:25 ` Peter Zijlstra
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