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Re: [Xen-devel] Re: [Xen-users] rebased openSUSE Xen dom0 Patches

To: Simon Graham <simon.graham@xxxxxxxxxxxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: Re: [Xen-devel] Re: [Xen-users] rebased openSUSE Xen dom0 Patches
From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Date: Thu, 15 Apr 2010 19:41:08 +0100
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On 15/04/2010 19:36, "Simon Graham" <simon.graham@xxxxxxxxxxxxxxxxxxx>
wrote:

> It is not clear whether Dom0 is erroneously using pages that are and truly
> should be writable, or whether somehow pages have erroneously become writable;
> if anyone can suggest likely places to look for problems that would be
> awesome!

Typically it means that the guest kernel hasn't managed to zap all of its
writable mappings of a page before assigning it for use as a page table.
That doesn't immediately point to the bug, unfortunately. ;-)

 -- Keir



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