<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW --- - [ILK]igt/kms_render/gpu-blit randomly causes system hang" href="https://bugs.freedesktop.org/show_bug.cgi?id=67243#c13">Comment # 13</a> on <a class="bz_bug_link bz_status_NEW " title="NEW --- - [ILK]igt/kms_render/gpu-blit randomly causes system hang" href="https://bugs.freedesktop.org/show_bug.cgi?id=67243">bug 67243</a> from <a class="email" href="mailto:imre.deak@gmail.com" title="Imre Deak <imre.deak@gmail.com>"> Imre Deak</a> <pre>Created <a href="attachment.cgi?id=84929" name="attach_84929" title="fix ilk ring flush workaround">attachment 84929</a> <a href="attachment.cgi?id=84929&action=edit" title="fix ilk ring flush workaround">[details]</a> <a href='page.cgi?id=splinter.html&bug=67243&attachment=84929'>[review]</a> fix ilk ring flush workaround The only notable from your .config was that you're running on 32 bit kernel, but I couldn't reproduce the hang even on that. I'm still not sure that it's not a ring flushing issue, since in your last reply you didn't provide separate results for --run-subtest gpu-blit and direct-render. Anyway, I noticed that Chris' infinite __wait_seqno patch makes a clear improvement in gem_quiescent_gpu(), by getting rid of occasional stalls in it, so it would be worth trying it (and I just realized he also suggested this earlier on IRC to me). Please give a go to the following: <a href="https://patchwork.kernel.org/patch/2849600/">https://patchwork.kernel.org/patch/2849600/</a> I also found an igt regression in flush_on_ring_common() and since that is related to ilk, it's also a possible cause. I attached the fix for it, could you please try that too?</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>