<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [CI][BAT] igt@drv_selftest@live_hangcheck - _igt_reset_evict_vma timed out" href="https://bugs.freedesktop.org/show_bug.cgi?id=108735#c2">Comment # 2</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [CI][BAT] igt@drv_selftest@live_hangcheck - _igt_reset_evict_vma timed out" href="https://bugs.freedesktop.org/show_bug.cgi?id=108735">bug 108735</a> from <a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> Chris Wilson</a> <pre>Seems similar to: commit d6fee0dee09317d5e83e9b855316cb779dd679cf Author: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>> Date: Tue Aug 14 11:40:56 2018 +0100 drm/i915: Kick waiters on resetting legacy rings This reapplies commit 39f3be162c46 ("drm/i915: Kick waiters on resetting legacy rings") after the improved gem_eio was run across all machines we found that gen3 and early gen4 still lost the immediate interrupt following reset, and the HWSTAM w/a applied to gen6+ is inadequate. Unlike the later gen, on gen3/4 the principle (and only tests to fail so far) are the wait vs reset test cases, whereas the reset stress case works fine (which was the predominantly failing case for gen6+). That is enough to suggest the underlying issue is sufficiently different to support the difference in HWSTAM efficacy. Testcase: igt/gem_eio/wait-10ms References: 39f3be162c46 ("drm/i915: Kick waiters on resetting legacy rings") References: a69ab52b0358 ("drm/i915: Remove extra waiter kick on legacy resets") Signed-off-by: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>> Cc: Matthew Auld <<a href="mailto:matthew.auld@intel.com">matthew.auld@intel.com</a>> Cc: Mika Kuoppala <<a href="mailto:mika.kuoppala@linux.intel.com">mika.kuoppala@linux.intel.com</a>> Reviewed-by: Mika Kuoppala <<a href="mailto:mika.kuoppala@linux.intel.com">mika.kuoppala@linux.intel.com</a>> Link: <a href="https://patchwork.freedesktop.org/patch/msgid/20180814104056.27001-1-chris@chris-wilson.co.uk">https://patchwork.freedesktop.org/patch/msgid/20180814104056.27001-1-chris@chris-wilson.co.uk</a></pre> </div> <hr> You are receiving this mail because: <ul> <li>You are on the CC list for the bug.</li> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>