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<body><span class="vcard"><a class="email" href="mailto:joonas.lahtinen@linux.intel.com" title="Joonas Lahtinen <joonas.lahtinen@linux.intel.com>"> <span class="fn">Joonas Lahtinen</span></a>
</span> changed
<a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - [SKL]igt/gem_concurrent_blit subcase sporadically causes system hang and *ERROR* blitter: timed out waiting for forcewake ack to clear."
href="https://bugs.freedesktop.org/show_bug.cgi?id=89959">bug 89959</a>
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<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">Status</td>
<td>NEW
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<td>ASSIGNED
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<b><a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - [SKL]igt/gem_concurrent_blit subcase sporadically causes system hang and *ERROR* blitter: timed out waiting for forcewake ack to clear."
href="https://bugs.freedesktop.org/show_bug.cgi?id=89959#c12">Comment # 12</a>
on <a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - [SKL]igt/gem_concurrent_blit subcase sporadically causes system hang and *ERROR* blitter: timed out waiting for forcewake ack to clear."
href="https://bugs.freedesktop.org/show_bug.cgi?id=89959">bug 89959</a>
from <span class="vcard"><a class="email" href="mailto:joonas.lahtinen@linux.intel.com" title="Joonas Lahtinen <joonas.lahtinen@linux.intel.com>"> <span class="fn">Joonas Lahtinen</span></a>
</span></b>
<pre>This was earlier masked by an another bug (possibly e1000e memory corrupt one)
bufmgr would initialize properly only at random occasions, so the testcase
could not be run succesfully at all. Now that the bufmgr initializes properly
so able to proceed.
The gem_render_copy test runs for several thousand iterations without crashing.
I'm getting hangs with gem_concurrent_blit now, but they're different than the
earlier reported ones;
[ 681.882688] gem_concurrent_blit: starting subtest
gtt-render-overwrite-source-forked
[ 682.869957] [drm] RC6 on
[ 686.869348] [drm] stuck on render ring
[ 686.873886] [drm] GPU HANG: ecode 9:0:0x85dffffb, in gem_concurrent_
[12313], reason: Ring hung, action: reset
[ 686.887309] drm/i915: Resetting chip after gpu hang
[ 686.904592] gem_concurrent_blit: starting subtest
gtt-render-overwrite-source-read-bcs-forked
The error reports do not seem very coherent with single bug, I continue looking
at the problem I get.</pre>
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