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<body><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> changed
<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [CI][SHARDS] igt@perf@gen8-unprivileged-single-ctx-counters|igt@gem_softpin@softpin| igt@gem_pipe_control_store_loop@reused-buffer - timeout - Received signal SIGQUIT."
href="https://bugs.freedesktop.org/show_bug.cgi?id=111732">bug 111732</a>
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<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
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<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>FIXED
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<td style="text-align:right;">Status</td>
<td>NEW
</td>
<td>RESOLVED
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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [CI][SHARDS] igt@perf@gen8-unprivileged-single-ctx-counters|igt@gem_softpin@softpin| igt@gem_pipe_control_store_loop@reused-buffer - timeout - Received signal SIGQUIT."
href="https://bugs.freedesktop.org/show_bug.cgi?id=111732#c10">Comment # 10</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [CI][SHARDS] igt@perf@gen8-unprivileged-single-ctx-counters|igt@gem_softpin@softpin| igt@gem_pipe_control_store_loop@reused-buffer - timeout - Received signal SIGQUIT."
href="https://bugs.freedesktop.org/show_bug.cgi?id=111732">bug 111732</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>commit 58b4c1a07ada7fb91ea757bdb9bd47df02207357 (HEAD -> drm-intel-next-queued,
drm-intel/drm-intel-next-queued)
Author: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
Date: Tue Nov 26 06:55:21 2019 +0000
drm/i915: Reduce nested prepare_remote_context() to a trylock
On context retiring, we may invoke the kernel_context to unpin this
context. Elsewhere, we may use the kernel_context to modify this
context. This currently leads to an AB-BA lock inversion, so we need to
back-off from the contended lock, and repeat.
Bugzilla: <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [CI][SHARDS] igt@perf@gen8-unprivileged-single-ctx-counters|igt@gem_softpin@softpin| igt@gem_pipe_control_store_loop@reused-buffer - timeout - Received signal SIGQUIT."
href="show_bug.cgi?id=111732">https://bugs.freedesktop.org/show_bug.cgi?id=111732</a>
Signed-off-by: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
Fixes: a9877da2d629 ("drm/i915/oa: Reconfigure contexts on the fly")
Reviewed-by: Tvrtko Ursulin <<a href="mailto:tvrtko.ursulin@intel.com">tvrtko.ursulin@intel.com</a>>
Link:
<a href="https://patchwork.freedesktop.org/patch/msgid/20191126065521.2331017-1-chris@chris-wilson.co.uk">https://patchwork.freedesktop.org/patch/msgid/20191126065521.2331017-1-chris@chris-wilson.co.uk</a></pre>
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