On Wed, Dec 14, 2011 at 04:46:48PM -0200, Eugeni Dodonov wrote: > On Wed, Dec 14, 2011 at 10:57, Daniel Vetter <daniel.vetter at ffwll.ch> wrote: > > > From: Chris Wilson <chris at chris-wilson.co.uk> > > > > As the buffer is not necessarily accessible through the GTT at the time > > of a GPU hang, and capturing some of its contents is far more valuable > > than skipping it, provide a clflushed fallback read path. We still > > prefer to read through the GTT as that is more consistent with the GPU > > access of the same buffer. So example it will demonstrate any errorneous > > tiling or swizzling of the command buffer as seen by the GPU. > > > > This becomes necessary with use of CPU relocations and lazy GTT binding, > > but could potentially happen anyway as a result of a pathological error. > > > > Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk> > > Reviewed-by: Daniel Vetter <daniel.vetter at ffwll.ch> > > Reviewed-by: Eugeni Dodonov <eugeni.dodonov at intel.com> I've got fed up with my kernel's all dying while testing cs prefetch behaviour, so I've included this patch in the current pile. Should also make qa's job a bit easier because the test is already included in i-g-t, but the fix won't be ready for the next -next cycle. -Daniel -- Daniel Vetter Mail: daniel at ffwll.ch Mobile: +41 (0)79 365 57 48
