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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>
          <br>
             <table border="1" cellspacing="0" cellpadding="8">
          <tr>
            <th>What</th>
            <th>Removed</th>
            <th>Added</th>
          </tr>

         <tr>
           <td style="text-align:right;">Resolution</td>
           <td>---
           </td>
           <td>FIXED
           </td>
         </tr>

         <tr>
           <td style="text-align:right;">Status</td>
           <td>NEW
           </td>
           <td>RESOLVED
           </td>
         </tr></table>
      <p>
        <div>
            <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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