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Re: [Xen-devel] [PATCH] x86: adjust reserved bit page fault handling

To: Jan Beulich <jbeulich@xxxxxxxxxx>, Tim Deegan <Tim.Deegan@xxxxxxxxxx>
Subject: Re: [Xen-devel] [PATCH] x86: adjust reserved bit page fault handling
From: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Date: Fri, 01 Feb 2008 10:54:41 +0000
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On 1/2/08 10:38, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote:

>> The shadow pagetable code deliberately introduces invalid pagetable
>> entries as part of its fast-path treatment of MMIO and not-present
>> entries in the guest tables, so paging_fault needs to be called for
>> PFEC_reserved_bit faults.
> Here's a replacement patch then, it would still be questionable whether
> reserved bit faults should ever be propagated to a guest...
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>

What problem does this patch solve?

 -- Keir

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