Re: [PATCH 0/3] xen: Use PM/Hibernate events for save/restore/chkpt

From: Pavel Machek <pavel@ucw.cz>
To: Shriram Rajagopalan <rshriram@cs.ubc.ca>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>,
	linux-pm@lists.linux-foundation.org,
	xen-devel@lists.xensource.com,
	Iam Campbell <ian.campbell@citrix.com>
Subject: Re: [PATCH 0/3] xen: Use PM/Hibernate events for save/restore/chkpt
Date: Sun, 20 Feb 2011 08:49:31 +0100	[thread overview]
Message-ID: <20110220074931.GA28485@elf.ucw.cz> (raw)
In-Reply-To: <1298157158-5421-1-git-send-email-rshriram@cs.ubc.ca>

On Sat 2011-02-19 15:12:35, Shriram Rajagopalan wrote:
> The current implementation of xen guest save/restore/checkpoint functionality
> uses PM_SUSPEND and PM_RESUME events. This is not optimal when taking
> checkpoints of a virtual machine (where the suspend hypercall returns
> non-zero, requiring the devices and xenbus to just pickup from where they left
> off instead of a complete teardown/reconnect to backend). 
> 
> The following set of patches modify this implementation to use Hibernate style
> control flow (freeze/restore for save/restore and freeze/thaw for checkpoint,
> which is merely a cancelled save akin to failed swsusp() ).
> 
> These patches are against Ian Campbell's PVHVM tree at
> git://xenbits.xen.org/people/ianc/linux-2.6.git for-stefano/pvhvm
> 
> at commit 8a8d1bc753c4e2dda5f2890292d60c67d6ebb573
> kernel version: 2.6.38-rc4

Series looks ok to me...
-- 
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(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html