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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - [BSW]igt/gem_ring_sync_loop causes GPU hang"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=89060">89060</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[BSW]igt/gem_ring_sync_loop causes GPU hang
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>DRI
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>unspecified
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>All
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Linux (All)
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>medium
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>DRM/Intel
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>intel-gfx-bugs@lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>huax.lu@intel.com
          </td>
        </tr>

        <tr>
          <th>QA Contact</th>
          <td>intel-gfx-bugs@lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>intel-gfx-bugs@lists.freedesktop.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=113305" name="attach_113305" title="dmesg">attachment 113305</a> <a href="attachment.cgi?id=113305&action=edit" title="dmesg">[details]</a></span>
dmesg

==System Environment==
--------------------------
Regression: not sure

no-working platforms: BSW

==kernel==
--------------------------
drm-intel-next-queued 21076372afe711072b9a447f22a098691dd0b2cb

==Bug detailed description==
-----------------------------
It causes GPU hang on BSW with drm-intel-next-queued kernel. On the
drm-intel-nightly kernel, it has <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - [BSW PPGTT]igt/gem_ring_sync_loop causes system hang"
   href="show_bug.cgi?id=88987">bug 88987</a>, when bisect <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - [BSW PPGTT]igt/gem_ring_sync_loop causes system hang"
   href="show_bug.cgi?id=88987">bug 88987</a>, catch this
issue.

output:
IGT-Version: 1.9-gbef692d (x86_64) (Linux: 3.19.0-rc5_kcloud_210763_20150209+
x86_64)

^C^C^C^C^C^C^C^C^C^C^C^C
real    12m41.468s
user    0m0.009s
sys     0m0.032s

==Reproduce steps==
---------------------------- 
1. ./gem_ring_sync_loop</pre>
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