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Old 01-06-06, 10:19 AM   #15
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PrakashP's Avatar
Join Date: Jul 2004
Location: Germania
Posts: 213
Default Re: horrible 2D performance

Originally Posted by zander
@PrakashP: current NVIDIA Linux drivers use the processor's PAT to mark frame buffer and/or AGP aperture mappings write-combined, a MTRR is not installed for the relevant I/O apertures.
Interesting, I thought you needed kernel support for that? I read in the mailing list archive that Terrence Ripperda once posted a patch for PAT in the kernel, but it wasn't merged because of Intel erratas or alike.
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