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    <body><span class="vcard"><a class="email" href="mailto:lakshminarayana.vudum@intel.com" title="Lakshmi <lakshminarayana.vudum@intel.com>"> <span class="fn">Lakshmi</span></a>
</span> changed
          <a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED FIXED - [CI][SHARDS] igt@perf_pmu@* - dmesg-warn - WARNING: inconsistent lock state"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=111295">bug 111295</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;">i915 platform</td>
           <td>
                
           </td>
           <td>BYT
           </td>
         </tr></table>
      <p>
        <div>
            <b><a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED FIXED - [CI][SHARDS] igt@perf_pmu@* - dmesg-warn - WARNING: inconsistent lock state"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=111295#c12">Comment # 12</a>
              on <a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED FIXED - [CI][SHARDS] igt@perf_pmu@* - dmesg-warn - WARNING: inconsistent lock state"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=111295">bug 111295</a>
              from <span class="vcard"><a class="email" href="mailto:lakshminarayana.vudum@intel.com" title="Lakshmi <lakshminarayana.vudum@intel.com>"> <span class="fn">Lakshmi</span></a>
</span></b>
        <pre>(In reply to Chris Wilson from <a href="show_bug.cgi?id=111295#c10">comment #10</a>)
<span class="quote">> commit c7302f204490f3eb4ef839bec228315bcd3ba43f (drm-intel/for-linux-next,
> drm-intel/drm-intel-next-queued)
> Author: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
> Date:   Thu Aug 8 21:27:58 2019 +0100

>     drm/i915: Defer final intel_wakeref_put to process context
>     
>     As we need to acquire a mutex to serialise the final
>     intel_wakeref_put, we need to ensure that we are in process context at
>     that time. However, we want to allow operation on the intel_wakeref from
>     inside timer and other hardirq context, which means that need to defer
>     that final put to a workqueue.
>     
>     Inside the final wakeref puts, we are safe to operate in any context, as
>     we are simply marking up the HW and state tracking for the potential
>     sleep. It's only the serialisation with the potential sleeping getting
>     that requires careful wait avoidance. This allows us to retain the
>     immediate processing as before (we only need to sleep over the same
>     races as the current mutex_lock).
>     
>     v2: Add a selftest to ensure we exercise the code while lockdep watches.
>     v3: That test was extremely loud and complained about many things!
>     v4: Not a whale!
>     
>     Bugzilla: <a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED FIXED - [CI][SHARDS] igt@perf_pmu@* - dmesg-warn - WARNING: inconsistent lock state"
   href="show_bug.cgi?id=111295">https://bugs.freedesktop.org/show_bug.cgi?id=111295</a>
>     References: <a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED FIXED - [CI][SHARDS] igt@perf_pmu@busy-hang-bcs0 - fail - Failed assertion: (double)(val) <= (1.0 + (tolerance)) * (double)(0) && (double)(val) >= (1.0 - (tolerance)) * (double)(0)"
   href="show_bug.cgi?id=111245">https://bugs.freedesktop.org/show_bug.cgi?id=111245</a>
>     References: <a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED FIXED - [CI][SHARDS] igt@prime_busy@wait-hang-vebox|igt@gem_eio@in-flight-suspend - dmesg-warn - kernel BUG at ./drivers/gpu/drm/i915/intel_wakeref.h:110!"
   href="show_bug.cgi?id=111256">https://bugs.freedesktop.org/show_bug.cgi?id=111256</a>
>     Fixes: 18398904ca9e ("drm/i915: Only recover active engines")
>     Fixes: 51fbd8de87dc ("drm/i915/pmu: Atomically acquire the gt_pm
> wakeref")
>     Signed-off-by: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
>     Cc: Tvrtko Ursulin <<a href="mailto:tvrtko.ursulin@intel.com">tvrtko.ursulin@intel.com</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/20190808202758.10453-1">https://patchwork.freedesktop.org/patch/msgid/20190808202758.10453-1</a>-
> <a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a></span >

(In reply to CI Bug Log from <a href="show_bug.cgi?id=111295#c11">comment #11</a>)
<span class="quote">> A CI Bug Log filter associated to this bug has been updated:

> {- HSW APL SKL GLK ICL: igt@perf_pmu@* - dmesg-warn - WARNING: inconsistent
> lock state -}
> {+ HSW BYT APL SKL GLK ICL: igt@perf_pmu@* - dmesg-warn - WARNING:
> inconsistent lock state +}

> New failures caught by the filter:

>   *
> <a href="https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_346/fi-byt-n2820/">https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_346/fi-byt-n2820/</a>
> igt@<a href="mailto:perf_pmu@busy-hang-bcs0.html">perf_pmu@busy-hang-bcs0.html</a></span >

Seen on BYT.</pre>
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