Re: [Xen-devel] [PATCH 0/3] x2APIC improvement

[Weidong Han <weidong.han@xxxxxxxxx>]

Konrad Rzeszutek Wilk wrote:
> On Mon, Jul 05, 2010 at 03:07:58PM +0800, Han, Weidong wrote:
>   
> > The patchset improves Xen x2APIC support. 
> >
> > Patch 1/3: allocate iommu when create a drhd
> >         A drhd is created when parse ACPI DMAR table, but drhd->iommu is not 
> > allocated until iommu setup. But iommu is needed by x2APIC which will enable interrupt 
> > remapping before iommu setup. This patch allocates iommu when create drhd. And then 
> > drhd->ecap can be removed because it's the same as iommu->ecap.
> >
> >     
> Have these patches been tested on a machine where the number of DRHD !=
> number of IOAPICs?
>
>   
Why need to care about number of DRHD != number of IOAPICs? One DRHD may 
cover more than one IOAPICs. And there is already check if all IOAPICs 
have corresponding DRHD.
Regards,
Weidong

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