<div class="gmail_quote">On Sun, Nov 27, 2011 at 15:58, Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"> Otherwise hangcheck spuriously fires when running blitter/bsd-only workloads. Contrary to a similar patch by Ben Widawsky this does not check INSTDONE of the other rings. Chris Wilson implied that in a failure to detect a hang, most likely because INSTDONE was fluctuating. Thus only check ACTHD, which as far as I know is rather reliable. Also, blitter and bsd rings can't launch complex tasks from a single instruction (like 3D_PRIM on the render with complex or even infinite shaders). This fixes spurious gpu hang detection when running tests/gem_hangcheck_forcewake on snb/ivb. Signed-Off-by: Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>> </blockquote><div> Reviewed-by: Eugeni Dodonov <<a href="mailto:eugeni.dodonov@intel.com">eugeni.dodonov@intel.com</a>> </div></div> -- Eugeni Dodonov<a href="http://eugeni.dodonov.net/" target="_blank"> </a>