linux-kernel - Re: [Xen-devel] [PATCH v2] xen/smp: Use die_complete completion when taking CPU down

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Date:	Wed, 22 Oct 2014 08:36:37 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	David Vrabel <david.vrabel@...rix.com>,
	Boris Ostrovsky <boris.ostrovsky@...cle.com>,
	tglx@...utronix.de, mingo@...hat.com, konrad.wilk@...cle.com
CC:	tianyu.lan@...el.com, xen-devel@...ts.xenproject.org,
	linux-kernel@...r.kernel.org
Subject: Re: [Xen-devel] [PATCH v2] xen/smp: Use die_complete completion when
 taking CPU down

On 10/22/2014 08:32 AM, David Vrabel wrote:
> On 16/10/14 17:47, Boris Ostrovsky wrote:
>> Commit 2ed53c0d6cc9 ("x86/smpboot: Speed up suspend/resume by avoiding
>> 100ms sleep for CPU offline during S3") introduced completions to CPU
>> offlining process. These completions are not initialized on Xen kernels
>> causing a panic in play_dead_common().
>>
>> Move handling of die_complete into common routines to make them
>> available to Xen guests.
>>
>> (Also, while at it, move these routines as well as die_complete under
>> ifdef CONFIG_HOTPLUG_CPU)
> 
> Reviewed-by: David Vrabel <david.vrabel@...rix.com>
> 
> I can merge this via the Xen tree if that is preferred.
> 

Since it touches non-Xen code I'd rather not.

	-hpa


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