On Tue, 2009-05-26 at 21:17 +0200, Peter Zijlstra wrote: > On Tue, 2009-05-26 at 12:27 -0400, Kyle McMartin wrote: > > From: Kyle McMartin > > > > Ensure we allocate GEM objects below 4GB on PAE machines, otherwise > > misery ensues. This patch is based on a patch found on dri-devel by > > Shaohua Li, but Keith P. expressed reticence that the changes unfairly > > penalized other hardware. > > > > (The mm/shmem.c hunk is necessary to ensure the DMA32 flag isn't used > > by the slab allocator via radix_tree_preload, which will hit a > > WARN_ON.) > > Why is this, is the gart not PAE friendly? > > Seems to me its a grand way of promoting 64bit hard/soft-ware. No, the GART's fine. But the APIs required to make the AGP code PAE-friendly got deprecated, so the patches to fix the AGP code got NAKed, and Venkatesh never sent out his patches to undeprecate the APIs and use them. It's been like 6 months now, and it's absurd. I'd like to see this patch go in so people's graphics can start working again and stop corrupting system memory. -- Eric Anholt eric@anholt.net eric.anholt@intel.com