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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - Delay in skl_disable_plane() causes a system freeze"
href="https://bugs.freedesktop.org/show_bug.cgi?id=104975#c50">Comment # 50</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - Delay in skl_disable_plane() causes a system freeze"
href="https://bugs.freedesktop.org/show_bug.cgi?id=104975">bug 104975</a>
from <span class="vcard"><a class="email" href="mailto:marc.herbert@intel.com" title="marc.herbert@intel.com">marc.herbert@intel.com</a>
</span></b>
<pre>Tarun's experience seem to differ:
<a href="https://lists.freedesktop.org/archives/intel-gfx/2018-April/162279.html">https://lists.freedesktop.org/archives/intel-gfx/2018-April/162279.html</a>
<span class="quote">> We run the evasion code with IRQs disabled, so at the time critical point the code is fully deterministic, even in the worst case.</span >
Even if this can be proven with absolute certainty in some particular kernel
version(s), it sounds like a guarantee difficult to maintain over time in
hardware+firmware+software systems not designed for and generally not
interested in real-time (and even more difficult to maintain in product kernels
with many various backports - but I digress)</pre>
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