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Re: [Xen-ia64-devel] [PATCH] Another important Xen/ia64 domU/vbd fix

To: "Tian, Kevin" <kevin.tian@xxxxxxxxx>, <xen-ia64-devel@xxxxxxxxxxxxxxxxxxx>
Subject: Re: [Xen-ia64-devel] [PATCH] Another important Xen/ia64 domU/vbd fix
From: Tristan Gingold <Tristan.Gingold@xxxxxxxx>
Date: Wed, 4 Jan 2006 16:34:15 +0100
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Le Mercredi 04 Janvier 2006 13:26, Tian, Kevin a écrit :
> Hi, Dan,
>       Attached is another important Xen/ia64 fix to enable domU/vbd
> working on system with >1G hole in dom0's memory layout. Once memmap of
> dom0 is virtualized, there's no way for dom0 to access machine frames
> (like from domU) which is outside of EFI memory layout known by dom0,
> because of no mapping. So we have to disable CONFIG_VIRTUAL_MEM_MAP
> explicitly, to ensure dom0 constructing a physical memmap array.
Hmm, this side effect is very interesting.

If Xen requires virtual_mem_map, then dom0 will require it too.
Since dom0 can't work yet with virtual_mem_map, enabling it in Xen is moot, 
isn't it ?


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