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SubjectRe: [PATCH 5/7] arch/x86: Add array variants for setting memory to wc caching.
On 05/18/2010 02:34 AM, Dave Airlie wrote:
> On Thu, Apr 1, 2010 at 10:45 PM, Pauli Nieminen <> wrote:
>> Setting single memory pages at a time to wc takes a lot time in cache flush. To
>> reduce number of cache flush set_pages_array_wc and set_memory_array_wc can be
>> used to set multiple pages to WC with single cache flush.
>> This improves allocation performance for wc cached pages in drm/ttm.
> I've got this in drm-next for quite a while and almost forgot about
> it, I'm meant to be on holidays and I'd really like to just have Linus
> pull my tree,
> I had only one issue with this as we had some problems with doing it
> before but it looks like they've since been fixed in the x86 pat code
> a kernel or two ago so this patch should be fine now.
> its been well tested in drm-next on AGP machines by the author,
> any objections to this?
> Dave.

Acked-by: H. Peter Anvin <>

Go ahead and push it; the patch is straightforward, and the author
(Venki) is reliable.


P.S. Please Cc: all the x86 maintainers, not just Ingo.

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