On Tue, Nov 29, 2011 at 07:02:06PM +0000, Chris Wilson wrote: > 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> > Cc: Daniel Vetter <daniel.vetter at ffwll.ch> Reviewed-by: Daniel Vetter <daniel.vetter at ffwll.ch> -- Daniel Vetter Mail: daniel at ffwll.ch Mobile: +41 (0)79 365 57 48
