[Intel-gfx] [PATCH] agp: Fix stolen memory counting on G4X.

[Eric Anholt]

On Wed, 2008-10-15 at 13:25 +0800, Zhenyu Wang wrote:
> On 2008.10.14 11:38:18 -0700, Eric Anholt wrote:
> > On the GM45, the amount of stolen memory mapped to the GTT was underestimated,
> > even though we had 508KB more available since the GTT doesn't take from
> > stolen memory. On the non-GM45 G4X, we overestimated how much stolen was
> > mapped to the GTT by 4KB, resulting in GPU page faults when that page was
> > accessed.
> > 
> > This update requires a corresponding update to xf86-video-intel to work
> > correctly.
> 
> How should we handle compability when pushing this upstream? 2.6.26/27 user
> with upstream intel video driver... (my origin G33 stolen memory fix got
> reverted because of this, although I think that revert is wrong. people has
> bug so upgrade shouldn't be a problem...)

Servers fail massively without both fixes, so it's only a regression in
a very strange sense.  I'll be adamant about getting this in, it's not
optional.

-- 
Eric Anholt
eric at anholt.net                         eric.anholt at intel.com


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