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Re: [Xen-devel] [PATCH] fs-backend: fix gnttab unmap

from [Keith Coleman]

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To:	Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
Subject:	Re: [Xen-devel] [PATCH] fs-backend: fix gnttab unmap
From:	Keith Coleman <list.keith@xxxxxxxxxxx>
Date:	Fri, 20 Mar 2009 18:00:07 -0400
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On Thu, Mar 19, 2009 at 12:58 PM, Stefano Stabellini
<stefano.stabellini@xxxxxxxxxxxxx> wrote:
> Hi all,
> when a stubdom is destroyed, fs-backend does not correctly unmap all the
> pages mapped for the shared ring.
> This causes some pages not to be properly freed by xen, hence after a
> cycle of 50 save\restore we don't have enough spare memory to start 2
> VMs any more.
> This patch fixes the issue properly unmapping all the pages needed by
> the shared ring.
>

I can confirm that fs-backend is more stable. I have performed
hundreds of save/restore cycles without issue.


Keith Coleman

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