Re: [regression] glx performance drop with: "x86: PAT: implementtrack/untrack of pfnmap regions for x86 - v3"

[H. Peter Anvin]

Alexey Fisher wrote:
> glx perfomance regression after this patch.
> goot kernel: glxgears = 1400 fps
> bad kernel: glxgears = 300 fps ( same speed with disabled drm module )
>
> kernel log:
> glxgears:5775 map pfn expected mapping type write-back for
> d1000000-d1c80000, got uncached-minus
> glxgears:5775 freeing invalid memtype d1000000-d1c80000

Have we caught a case of actual overlap, i.e. a driver bug here?

	-hpa
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