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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][BAT] igt@gem_sync@basic-store-each - incomplete - Kernel panic - not syncing: Fatal exception in interrupt"
href="https://bugs.freedesktop.org/show_bug.cgi?id=111427">bug 111427</a>
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<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
</td>
</tr></table>
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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [CI][BAT] igt@gem_sync@basic-store-each - incomplete - Kernel panic - not syncing: Fatal exception in interrupt"
href="https://bugs.freedesktop.org/show_bug.cgi?id=111427#c5">Comment # 5</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [CI][BAT] igt@gem_sync@basic-store-each - incomplete - Kernel panic - not syncing: Fatal exception in interrupt"
href="https://bugs.freedesktop.org/show_bug.cgi?id=111427">bug 111427</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>I think I understand...
commit a20ab592d1a87218229109d109b8e2feae6f598d
Author: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
Date: Wed Aug 21 15:23:36 2019 +0100
drm/i915/execlists: Set priority hint prior to submission
Since we now run process_csb() outside of the engine->active.lock, we
can process a CS-event immediately upon our ELSP write. As we currently
inspect the pending queue *after* the ELSP write, there is an
opportunity for a CS-event to update the pending queue before we can
read it, making ourselves chases an invalid pointer.
Bugzilla: <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [CI][BAT] igt@gem_sync@basic-store-each - incomplete - Kernel panic - not syncing: Fatal exception in interrupt"
href="show_bug.cgi?id=111427">https://bugs.freedesktop.org/show_bug.cgi?id=111427</a>
Fixes: df403069029d ("drm/i915/execlists: Lift process_csb() out of the
irq-off spinlock")
Signed-off-by: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
Cc: Mika Kuoppala <<a href="mailto:mika.kuoppala@linux.intel.com">mika.kuoppala@linux.intel.com</a>>
Reviewed-by: Mika Kuoppala <<a href="mailto:mika.kuoppala@linux.intel.com">mika.kuoppala@linux.intel.com</a>>
Link:
<a href="https://patchwork.freedesktop.org/patch/msgid/20190821142336.21609-1-chris@chris-wilson.co.uk">https://patchwork.freedesktop.org/patch/msgid/20190821142336.21609-1-chris@chris-wilson.co.uk</a></pre>
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