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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - GPU hang on Haswell while encoding and decoding video"
href="https://bugs.freedesktop.org/show_bug.cgi?id=109629#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - GPU hang on Haswell while encoding and decoding video"
href="https://bugs.freedesktop.org/show_bug.cgi?id=109629">bug 109629</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>Looks like a userspace bug though; it doesn't match the expected typical error
for invalid TLB (due to a bad mm switch). Batch was submitted by vaapi, so
double check you've pulled the latest libva, and raise a bug with them (they
have historically forgotten to setup their SBA correctly and such
use-after-free bugs in their cmdbuffers...)
One other thing to double check kernel side is disabling iommu -- although the
error state doesn't indicate that to be a problem, just useful to rule out that
as a source of memory latency / incoherency / missed flushed|invalidate.</pre>
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