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    <body><span class="vcard"><a class="email" href="mailto:jinxianx.guo@intel.com" title="Guo Jinxian <jinxianx.guo@intel.com>"> <span class="fn">Guo Jinxian</span></a>
</span> changed
              <a class="bz_bug_link 
          bz_status_ASSIGNED "
   title="ASSIGNED - [BYT/BSW full-ppgtt] igt/gem_concurrent_blit/gtt-bcs-overwrite-source-forked fails"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=84891">bug 84891</a>
          <br>
             <table border="1" cellspacing="0" cellpadding="8">
          <tr>
            <th>What</th>
            <th>Removed</th>
            <th>Added</th>
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         <tr>
           <td style="text-align:right;">Status</td>
           <td>NEEDINFO
           </td>
           <td>ASSIGNED
           </td>
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        <div>
            <b><a class="bz_bug_link 
          bz_status_ASSIGNED "
   title="ASSIGNED - [BYT/BSW full-ppgtt] igt/gem_concurrent_blit/gtt-bcs-overwrite-source-forked fails"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=84891#c9">Comment # 9</a>
              on <a class="bz_bug_link 
          bz_status_ASSIGNED "
   title="ASSIGNED - [BYT/BSW full-ppgtt] igt/gem_concurrent_blit/gtt-bcs-overwrite-source-forked fails"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=84891">bug 84891</a>
              from <span class="vcard"><a class="email" href="mailto:jinxianx.guo@intel.com" title="Guo Jinxian <jinxianx.guo@intel.com>"> <span class="fn">Guo Jinxian</span></a>
</span></b>
        <pre>(In reply to Daniel Vetter from <a href="show_bug.cgi?id=84891#c8">comment #8</a>)
<span class="quote">> Please double-check the bisect by reverting it. Likely this is an unstable
> testcase, so please double-check that the last good commit is _really_ good.</span >

Revert commit 3e766b8255efb6c994e6501be2af44b4bdc4d191 on latest igt
(d8078911f63494eba67f8f07ffb56c4bdeae7bc9), the result is timeout(<a class="bz_bug_link 
          bz_status_VERIFIED  bz_closed"
   title="VERIFIED FIXED - [BSW]igt/gem_concurrent_blit some subcases cause long time to execute"
   href="show_bug.cgi?id=84354">bug 84354</a>)

root@x-bsw03:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# time
./gem_concurrent_blit --run-subtest gtt-bcs-overwrite-source-forked
IGT-Version: 1.8-g0ff65f5 (x86_64) (Linux:
3.18.0-rc5_drm-intel-nightly_18748b_20141121+ x86_64)
using 2x512 buffers, each 1MiB
Subtest gtt-bcs-overwrite-source-forked: SUCCESS (645.203s)

real    10m45.365s
user    42m37.140s
sys     0m19.875s</pre>
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