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Re: [Xen-devel] [PATCH] Fix xm save timeout with paused domains

To: John Levon <levon@xxxxxxxxxxxxxxxxx>
Subject: Re: [Xen-devel] [PATCH] Fix xm save timeout with paused domains
From: Keir Fraser <keir@xxxxxxxxxxxxx>
Date: Tue, 08 May 2007 17:26:50 +0100
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Thread-topic: [Xen-devel] [PATCH] Fix xm save timeout with paused domains
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On 8/5/07 17:25, "John Levon" <levon@xxxxxxxxxxxxxxxxx> wrote:

>> How about just not pausing a domain that you're going to save?
> This doesn't work when you're doing tight save/restore / migration
> loops, where the unpausing happens after plugging virtual devices for
> the new domain. This can cause the timer to expire before we unpause the
> domain and give it a chance to update its frame list entry.

Hmm.. Perhaps 'xm restore/migrate' shouldn't return until the new domain is
actually running. Or (probably easier) xend should hold save requests
pending until the domain concerned is unpaused?

 -- Keir

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