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SubjectRe: [PATCH 2/3] x86: Define _PAGE_NUMA with unused physical address bits PMD and PTE levels
On Tue, Apr 08, 2014 at 09:16:49AM -0700, H. Peter Anvin wrote:
> On 04/08/2014 09:02 AM, Konrad Rzeszutek Wilk wrote:
> >>>
> >>> Amazon EC2 does have large memory instance types with NUMA exposed to
> >>> the guest (e.g. c3.8xlarge, i2.8xlarge, etc), so it'd be preferable
> >>> (to me anyway) if we didn't require !XEN.
> >
> > What about the patch that David Vrabel posted:
> >
> > http://osdir.com/ml/general/2014-03/msg41979.html
> >
> > Has anybody taken it for a spin?
> >
>
> Oh lovely, more pvops in low level paths. I'm so thrilled.
>
> Incidentally, I wasn't even Cc:'d on that patch and was only added to
> the thread by Linus, but never saw the early bits of the thread
> including the actual patch.
>

I posted an alternative to that patch that confines the damage to the
NUMA pte helpers.

--
Mel Gorman
SUSE Labs


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