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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO --- - [SNB, IVB libva+rc6] Page flips hang indefinitely, apparently waiting for mmio writes that never happen"
href="https://bugs.freedesktop.org/show_bug.cgi?id=75502#c35">Comment # 35</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO --- - [SNB, IVB libva+rc6] Page flips hang indefinitely, apparently waiting for mmio writes that never happen"
href="https://bugs.freedesktop.org/show_bug.cgi?id=75502">bug 75502</a>
from <span class="vcard"><a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> <span class="fn">Chris Wilson</span></a>
</span></b>
<pre>Created <span class=""><a href="attachment.cgi?id=97221" name="attach_97221" title="Reorder semaphore deadlock detection">attachment 97221</a> <a href="attachment.cgi?id=97221&action=edit" title="Reorder semaphore deadlock detection">[details]</a></span> <a href='page.cgi?id=splinter.html&bug=75502&attachment=97221'>[review]</a>
Reorder semaphore deadlock detection
It's #54226 again, but we failed to simply kick the stuck semaphore and
declared the GPU hung instead. The attached patch should detect the situation
better, but the root cause behind the hangs still remains unresolved.</pre>
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