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Subject: Re: [git head] X86_PAT & mprotect
From: Keith Packard <keith.packard@intel.com>
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To: Dave Airlie <airlied@gmail.com>
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Date: Fri, 09 May 2008 22:45:59 -0700
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On Sat, 2008-05-10 at 08:11 +1000, Dave Airlie wrote:

> Wow this kinda puts X in a nasty position, we have 2.6.25 and previous ke=
rnels
> where we use the original /sys interfaces and nasty hack to
> workaround, but on 2.6.26 we magically need to
> switch to the /sys _uc interfaces or the users X will slow down.

It didn't sound like that to me -- using UC- should mean that if we set
up MTRRs correctly, we'll get WC access for our frame buffer. Did I miss
something here?

--=20
keith.packard@intel.com

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