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Re: [Xen-devel] Error restoring DomU when using GPLPV

To: James Harper <james.harper@xxxxxxxxxxxxxxxx>
Subject: Re: [Xen-devel] Error restoring DomU when using GPLPV
From: ANNIE LI <annie.li@xxxxxxxxxx>
Date: Thu, 20 Aug 2009 19:55:31 +0800
Cc: Joshua West <jwest@xxxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx, Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
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Hi
Just finished test, live migration works well on winpv domu after ballooning down those pages when pv driver first load.
After more test, i find there are some problem with this method: ballooning down those pages when pv driver first load.

If i balloon down those pages when driver first load, save/restore can only work only once, and the migration can not work. It seems that a restored vm lost those pages ballooned down. For migration, destination does not have those pages which ballooned down on source.

But if i balloon down those pages every time(not driver first load), i tested save/restore/migration for several times, and all work fine. But the domu will waste lots of memory in this situation.

I will do more test about this and update here.

Thanks
Annie.

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