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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [BAT][CTG] DRM-Tip 4.11.0-rc5 introduced kms_pipe_crc_basic regression on C2D"
href="https://bugs.freedesktop.org/show_bug.cgi?id=100548#c24">Comment # 24</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [BAT][CTG] DRM-Tip 4.11.0-rc5 introduced kms_pipe_crc_basic regression on C2D"
href="https://bugs.freedesktop.org/show_bug.cgi?id=100548">bug 100548</a>
from <span class="vcard"><a class="email" href="mailto:marta.lofstedt@intel.com" title="Marta Löfstedt <marta.lofstedt@intel.com>"> <span class="fn">Marta Löfstedt</span></a>
</span></b>
<pre>Zijstras "new" patchset does not produce clean results. I have tested both with
and without the tsc=unstable kernel boot parameter.
But, the failure rate has gone down significantly.
I have 14 tests and to 50 repetitions => 700 invocations
Before Zijlstra first patch, failure rate was approximately 50% => 350 fails
Ziljstra first patch-set => 30 fails
Ziljstra new patch-set => 15 fails + 1 dmesg-warn
So, this is a big improvment.
However, since Villes patchset appear to fix the problem by 100%, we don't need
the Zijlstra patches for solving this regression.</pre>
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