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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO --- - [snb] semaphores deadlock -- testing improved deadlock breaker"
href="https://bugs.freedesktop.org/show_bug.cgi?id=80709#c5">Comment # 5</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO --- - [snb] semaphores deadlock -- testing improved deadlock breaker"
href="https://bugs.freedesktop.org/show_bug.cgi?id=80709">bug 80709</a>
from <span class="vcard"><a class="email" href="mailto:shuber@sthu.org" title="Stefan Huber <shuber@sthu.org>"> <span class="fn">Stefan Huber</span></a>
</span></b>
<pre>(In reply to <a href="show_bug.cgi?id=80709#c4">comment #4</a>)
<span class="quote">> It should emit a warning when it fires, could you check your logs to see if
> you have had such an event?</span >
# zcat messages-* | cat - messages | grep "waiting on" -A 8
Jul 18 16:33:09 euklid kernel: [ 9291.280145] render ring waiting on blitter
ring [recursion depth 0], seqno 0x801bd [current 0x801bd]
Jul 18 16:33:09 euklid kernel: [ 9291.280639] [drm] GPU HANG: ecode
-1:0x00000000, reason: Kicking stuck semaphore on render ring, action: continue
Jul 18 16:33:09 euklid kernel: [ 9291.280640] [drm] GPU hangs can indicate a
bug anywhere in the entire gfx stack, including userspace.
Jul 18 16:33:09 euklid kernel: [ 9291.280641] [drm] Please file a _new_ bug
report on bugs.freedesktop.org against DRI -> DRM/Intel
Jul 18 16:33:09 euklid kernel: [ 9291.280642] [drm] drm/i915 developers can
then reassign to the right component if it's not a kernel issue.
Jul 18 16:33:09 euklid kernel: [ 9291.280642] [drm] The gpu crash dump is
required to analyze gpu hangs, so please always attach it.
Jul 18 16:33:09 euklid kernel: [ 9291.280643] [drm] GPU crash dump saved to
/sys/class/drm/card0/error
Jul 18 16:33:09 euklid kernel: [ 9291.280669] blitter ring waiting on render
ring [recursion depth 0], seqno 0x801c1 [current 0x801bf]
Interesting, I cannot remember that that there was a crash yesterday.</pre>
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