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<div class="moz-cite-prefix">The free_job() callback is called only
way after the job has finished.<br>
<br>
That is one change actually made by you to the code :)<br>
<br>
Christian.<br>
<br>
Am 13.10.2017 um 10:39 schrieb Liu, Monk:<br>
</div>
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<p class="MsoNormal"><span
style="font-size:10.5pt;font-family:等线;color:windowtext"
lang="EN-US">I doubt it would always work fine…<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.5pt;font-family:等线;color:windowtext"
lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.5pt;font-family:等线;color:windowtext"
lang="EN-US">First, we have FENCE_TRACE reference
s_fence->finished after
“fence_signal(&fence->finished)”<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.5pt;font-family:等线;color:windowtext"
lang="EN-US">Second, we have
trace_amd_sched_proess_job(s_fence) after
“amd_sched_fence_finished()”,<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.5pt;font-family:等线;color:windowtext"
lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.5pt;font-family:等线;color:windowtext"
lang="EN-US">If you put the finished before free_job() and
by coincidence the job_finish() get very soon executed
you’ll have odds to hit wild pointer on above two cases<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.5pt;font-family:等线;color:windowtext"
lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.5pt;font-family:等线;color:windowtext"
lang="EN-US">BR Monk<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.5pt;font-family:等线;color:windowtext"
lang="EN-US"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #E1E1E1
1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext"
lang="EN-US">From:</span></b><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext"
lang="EN-US"> Koenig, Christian
<br>
<b>Sent:</b> 2017</span><span
style="font-size:11.0pt;color:windowtext">年</span><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext"
lang="EN-US">10</span><span
style="font-size:11.0pt;color:windowtext">月</span><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext"
lang="EN-US">13</span><span
style="font-size:11.0pt;color:windowtext">日</span><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext"
lang="EN-US"> 16:17<br>
<b>To:</b> Liu, Monk <a class="moz-txt-link-rfc2396E" href="mailto:Monk.Liu@amd.com"><Monk.Liu@amd.com></a>; Nicolai
Hähnle <a class="moz-txt-link-rfc2396E" href="mailto:nhaehnle@gmail.com"><nhaehnle@gmail.com></a>;
<a class="moz-txt-link-abbreviated" href="mailto:amd-gfx@lists.freedesktop.org">amd-gfx@lists.freedesktop.org</a><br>
<b>Subject:</b> Re: regression with
d6c650c0a8f6f671e49553725e1db541376d95f2<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"><span lang="EN-US">Yeah, that change is
actually incorrect and should be reverted.<br>
<br>
What we really need to do is remove dropping
sched_job->s_fence from amd_sched_process_job() into
amd_sched_job_finish() directly before the call to
free_job().<br>
<br>
Regards,<br>
Christian.<br>
<br>
Am 13.10.2017 um 09:24 schrieb Liu, Monk:<o:p></o:p></span></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<div id="divtagdefaultwrapper">
<div>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span
style="font-family:"Calibri",sans-serif"
lang="EN-US">commit
d6c650c0a8f6f671e49553725e1db541376d95f2<br>
Author: Nicolai Hähnle <a
href="mailto:nicolai.haehnle@amd.com"
moz-do-not-send="true"><nicolai.haehnle@amd.com></a><br>
@@ -611,6 +611,10 @@ static int amd_sched_main(void
*param)<br>
<br>
fence =
sched->ops->run_job(sched_job);<br>
amd_sched_fence_scheduled(s_fence);<br>
+<br>
+ /* amd_sched_process_job drops the
job's reference of the fence. */<br>
+ sched_job->s_fence = NULL;<br>
+<br>
if (fence) {<br>
s_fence->parent =
dma_fence_get(fence);<br>
r =
dma_fence_add_callback(fence, &s_fence->cb,<o:p></o:p></span></p>
</div>
<p><span style="font-family:"Calibri",sans-serif"
lang="EN-US">Hi Nicolai<o:p></o:p></span></p>
<p><span style="font-family:"Calibri",sans-serif"
lang="EN-US"><o:p> </o:p></span></p>
<p><span style="font-family:"Calibri",sans-serif"
lang="EN-US">with this patch, you will break
"amdgpu_sched_hw_job_reset()"routine:<o:p></o:p></span></p>
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<p class="MsoNormal"
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<div>
<p class="MsoNormal"
style="line-height:14.25pt;background:#1E1E1E"><span
style="font-size:10.5pt;font-family:"Courier
New";color:#569CD6" lang="EN-US">void</span><span
style="font-size:10.5pt;font-family:"Courier
New";color:#D4D4D4" lang="EN-US">
<o:p></o:p></span></p>
<p class="MsoNormal"
style="line-height:14.25pt;background:#1E1E1E"><span
style="font-size:10.5pt;font-family:"Courier
New";color:#DCDCAA" lang="EN-US">amd_sched_hw_job_reset</span><span
style="font-size:10.5pt;font-family:"Courier
New";color:#D4D4D4" lang="EN-US">(</span><span
style="font-size:10.5pt;font-family:"Courier
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style="font-size:10.5pt;font-family:"Courier
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amd_gpu_scheduler<o:p></o:p></span></p>
<p class="MsoNormal"
style="line-height:14.25pt;background:#1E1E1E"><span
style="font-size:10.5pt;font-family:"Courier
New";color:#D4D4D4" lang="EN-US">*sched)<o:p></o:p></span></p>
</div>
<p class="MsoNormal"
style="line-height:14.25pt;background:#1E1E1E"><span
style="font-size:10.5pt;font-family:"Courier
New";color:#D4D4D4" lang="EN-US"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"
style="line-height:14.25pt;background:#1E1E1E"><span
style="font-size:10.5pt;font-family:"Courier
New";color:#D4D4D4" lang="EN-US">{<o:p></o:p></span></p>
</div>
<p class="MsoNormal"
style="line-height:14.25pt;background:#1E1E1E"><span
style="font-size:10.5pt;font-family:"Courier
New";color:#D4D4D4" lang="EN-US"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"
style="line-height:14.25pt;background:#1E1E1E"><span
style="font-size:10.5pt;font-family:"Courier
New";color:#D4D4D4" lang="EN-US"> </span><span
style="font-size:10.5pt;font-family:"Courier
New";color:#569CD6" lang="EN-US">struct</span><span
style="font-size:10.5pt;font-family:"Courier
New";color:#D4D4D4" lang="EN-US"> amd_sched_job<o:p></o:p></span></p>
<p class="MsoNormal"
style="line-height:14.25pt;background:#1E1E1E"><span
style="font-size:10.5pt;font-family:"Courier
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</div>
<p class="MsoNormal"
style="line-height:14.25pt;background:#1E1E1E"><span
style="font-size:10.5pt;font-family:"Courier
New";color:#D4D4D4" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"
style="line-height:14.25pt;background:#1E1E1E"><span
style="font-size:10.5pt;font-family:"Courier
New";color:#D4D4D4" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"
style="line-height:14.25pt;background:#1E1E1E"><span
style="font-size:10.5pt;font-family:"Courier
New";color:#D4D4D4" lang="EN-US"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"
style="line-height:14.25pt;background:#1E1E1E"><span
style="font-size:10.5pt;font-family:"Courier
New";color:#D4D4D4" lang="EN-US"> </span><span
style="font-size:10.5pt;font-family:"Courier
New";color:#DCDCAA" lang="EN-US">spin_lock</span><span
style="font-size:10.5pt;font-family:"Courier
New";color:#D4D4D4" lang="EN-US">(&sched-></span><span
style="font-size:10.5pt;font-family:"Courier
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style="font-size:10.5pt;font-family:"Courier
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</div>
<p class="MsoNormal"
style="line-height:14.25pt;background:#1E1E1E"><span
style="font-size:10.5pt;font-family:"Courier
New";color:#D4D4D4" lang="EN-US"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"
style="line-height:14.25pt;background:#1E1E1E"><span
style="font-size:10.5pt;font-family:"Courier
New";color:#D4D4D4" lang="EN-US"> </span><span
style="font-size:10.5pt;font-family:"Courier
New";color:#DCDCAA" lang="EN-US">list_for_each_entry_reverse</span><span
style="font-size:10.5pt;font-family:"Courier
New";color:#D4D4D4" lang="EN-US">(s_job,<o:p></o:p></span></p>
<p class="MsoNormal"
style="line-height:14.25pt;background:#1E1E1E"><span
style="font-size:10.5pt;font-family:"Courier
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style="font-size:10.5pt;font-family:"Courier
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</div>
<p class="MsoNormal"
style="line-height:14.25pt;background:#1E1E1E"><span
style="font-size:10.5pt;font-family:"Courier
New";color:#D4D4D4" lang="EN-US"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"
style="line-height:14.25pt;background:#1E1E1E"><span
style="font-size:10.5pt;font-family:"Courier
New";color:#D4D4D4" lang="EN-US"> </span><span
style="font-size:10.5pt;font-family:"Courier
New";color:#C586C0" lang="EN-US">if</span><span
style="font-size:10.5pt;font-family:"Courier
New";color:#D4D4D4" lang="EN-US"> (s_job-></span><span
style="font-size:10.5pt;font-family:"Courier
New";color:#9CDCFE" lang="EN-US">s_fence</span><span
style="font-size:10.5pt;font-family:"Courier
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style="font-size:10.5pt;font-family:"Courier
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style="font-size:10.5pt;font-family:"Courier
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<p class="MsoNormal"
style="line-height:14.25pt;background:#1E1E1E"><span
style="font-size:10.5pt;font-family:"Courier
New";color:#D4D4D4" lang="EN-US">&&<o:p></o:p></span></p>
</div>
<p class="MsoNormal"
style="line-height:14.25pt;background:#1E1E1E"><span
style="font-size:10.5pt;font-family:"Courier
New";color:#D4D4D4" lang="EN-US"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"
style="line-height:14.25pt;background:#1E1E1E"><span
style="font-size:10.5pt;font-family:"Courier
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</span><span
style="font-size:10.5pt;font-family:"Courier
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style="font-size:10.5pt;font-family:"Courier
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style="font-size:10.5pt;font-family:"Courier
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</div>
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<div>
<p class="MsoNormal"
style="line-height:14.25pt;background:#1E1E1E"><span
style="font-size:10.5pt;font-family:"Courier
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&s_job-></span><span
style="font-size:10.5pt;font-family:"Courier
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style="font-size:10.5pt;font-family:"Courier
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style="font-size:10.5pt;font-family:"Courier
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style="font-size:10.5pt;font-family:"Courier
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<p class="MsoNormal"
style="line-height:14.25pt;background:#1E1E1E"><span
style="font-size:10.5pt;font-family:"Courier
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</div>
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<div>
<p class="MsoNormal"
style="line-height:14.25pt;background:#1E1E1E"><span
style="font-size:10.5pt;font-family:"Courier
New";color:#D4D4D4" lang="EN-US"> </span><span
style="font-size:10.5pt;font-family:"Courier
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style="font-size:10.5pt;font-family:"Courier
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style="font-size:10.5pt;font-family:"Courier
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style="font-size:10.5pt;font-family:"Courier
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style="font-size:10.5pt;font-family:"Courier
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style="font-size:10.5pt;font-family:"Courier
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</div>
<p class="MsoNormal"
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style="font-size:10.5pt;font-family:"Courier
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<div>
<p class="MsoNormal"
style="line-height:14.25pt;background:#1E1E1E"><span
style="font-size:10.5pt;font-family:"Courier
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style="font-size:10.5pt;font-family:"Courier
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style="font-size:10.5pt;font-family:"Courier
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</div>
<p class="MsoNormal"
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<div>
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style="line-height:14.25pt;background:#1E1E1E"><span
style="font-size:10.5pt;font-family:"Courier
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style="font-size:10.5pt;font-family:"Courier
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style="font-size:10.5pt;font-family:"Courier
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style="font-size:10.5pt;font-family:"Courier
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</div>
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</div>
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<p class="MsoNormal"
style="line-height:14.25pt;background:#1E1E1E"><span
style="font-size:10.5pt;font-family:"Courier
New";color:#D4D4D4" lang="EN-US"> </span><span
style="font-size:10.5pt;font-family:"Courier
New";color:#DCDCAA" lang="EN-US">spin_unlock</span><span
style="font-size:10.5pt;font-family:"Courier
New";color:#D4D4D4" lang="EN-US">(&sched-></span><span
style="font-size:10.5pt;font-family:"Courier
New";color:#9CDCFE" lang="EN-US">job_list_lock</span><span
style="font-size:10.5pt;font-family:"Courier
New";color:#D4D4D4" lang="EN-US">);<o:p></o:p></span></p>
</div>
<p class="MsoNormal"
style="line-height:14.25pt;background:#1E1E1E"><span
style="font-size:10.5pt;font-family:"Courier
New";color:#D4D4D4" lang="EN-US"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"
style="line-height:14.25pt;background:#1E1E1E"><span
style="font-size:10.5pt;font-family:"Courier
New";color:#D4D4D4" lang="EN-US">}<o:p></o:p></span></p>
</div>
<p class="MsoNormal"
style="line-height:14.25pt;background:#1E1E1E"><span
style="font-size:10.5pt;font-family:"Courier
New";color:#D4D4D4" lang="EN-US"><o:p> </o:p></span></p>
</div>
<p><span style="font-family:"Calibri",sans-serif"
lang="EN-US"><o:p> </o:p></span></p>
<p><span style="font-family:"Calibri",sans-serif"
lang="EN-US">see that without sched_job->s_fence, you
cannot remove the callback from its hw fence,<o:p></o:p></span></p>
<p><span style="font-family:"Calibri",sans-serif"
lang="EN-US"><o:p> </o:p></span></p>
<p><span style="font-family:"Calibri",sans-serif"
lang="EN-US">any idea??<o:p></o:p></span></p>
<p><span style="font-family:"Calibri",sans-serif"
lang="EN-US"><o:p> </o:p></span></p>
<p><span style="font-family:"Calibri",sans-serif"
lang="EN-US">BR Monk<o:p></o:p></span></p>
<p><span style="font-family:"Calibri",sans-serif"
lang="EN-US"><o:p> </o:p></span></p>
<p><span style="font-family:"Calibri",sans-serif"
lang="EN-US"><o:p> </o:p></span></p>
</div>
</blockquote>
<p><span lang="EN-US"><o:p> </o:p></span></p>
</div>
</blockquote>
<p><br>
</p>
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