St?phane Marchesin <marcheu at chromium.org> writes: > While investing some Sandy Bridge rendering corruption, I found out > that all physical memory pages below 1MiB were returning garbage when > read through the GTT. This has been causing graphics corruption (when > it's used for textures, render targets and pixmaps) and GPU hangups > (when it's used for GPU batch buffers).
It would be possible to exlude GFP_DMA from the page allocator. That covers the first 16MB. You just need a custom zone list with ZONE_DMA. -Andi -- ak at linux.intel.com -- Speaking for myself only
