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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 - [BYT]igt/gem_persistent_relocs/forked-interruptible-faulting-reloc-thrashing fails"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=84859">84859</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[BYT]igt/gem_persistent_relocs/forked-interruptible-faulting-reloc-thrashing fails
          </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>
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        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=107648" name="attach_107648" title="dmesg">attachment 107648</a> <a href="attachment.cgi?id=107648&action=edit" title="dmesg">[details]</a></span>
dmesg

==System Environment==
--------------------------
Regression: not sure, only reproduce on -nightly kernel.

==kernel==
--------------------------
drm-intel-nightly/ea4bec8e96ea8b33b49a7892c1c7f20041a56da6

==Bug detailed description==
It fails on BYT with drm-intel-nightly kernel. it pass on drm-intel-queued,
drm-intel-fixes, drm-fixes and drm-next kernel.

igt/gem_persistent_relocs/forked-interruptible-thrashing and
igt/gem_reloc_vs_gpu/forked-interruptible-faulting-reloc-thrashing also fail.

output:
IGT-Version: 1.8-g7f82289 (x86_64) (Linux:
3.17.0_drm-intel-nightly_ea4bec_20141009+ x86_64)
Test assertion failure function do_test, file gem_persistent_relocs.c:260:
Failed assertion: test == 0xdeadbeef
Last errno: 4, Interrupted system call
mismatch in buffer 0: 0x00000000 instead of 0xdeadbeef at offset 256
child 3 failed with exit status 99
Subtest forked-interruptible-faulting-reloc-thrashing: FAIL (451.180s)

==Reproduce steps==
---------------------------- 
1. ./gem_persistent_relocs --run-subtest
forked-interruptible-faulting-reloc-thrashing</pre>
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