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    <head>
      <base href="https://bugs.freedesktop.org/" />
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Priority</th>
          <td>medium
          </td>
        </tr>

        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - [IVB regression]I-G-T/gem_cacheing failed"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=57934">57934</a>
          </td>
        </tr>

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

        <tr>
          <th>Summary</th>
          <td>[IVB regression]I-G-T/gem_cacheing failed
          </td>
        </tr>

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

        <tr>
          <th>Severity</th>
          <td>major
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>All
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>yangweix.shui@intel.com
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Other
          </td>
        </tr>

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

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

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

        <tr>
          <th>Product</th>
          <td>DRI
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=71069" name="attach_71069" title="gem_cacheing fail dmesg">attachment 71069</a> <a href="attachment.cgi?id=71069&action=edit" title="gem_cacheing fail dmesg">[details]</a></span>
gem_cacheing fail dmesg

good commit:
Kernel: (drm-intel-next-queued)1a240d4de2ccf40de5796a4d1dbb3a0236051fc9

bad commit:
Kernel: (drm-intel-next-queued)46cddd0246ecca425a2d0f07f3102030665afc77


git bisect logļ¼š
---------------------
# bad: [46cddd0246ecca425a2d0f07f3102030665afc77] drm/i915: Remove duplicate
and unused register #defines in i915_reg.h
# good: [1a240d4de2ccf40de5796a4d1dbb3a0236051fc9] drm/i915: fixup sparse
warnings
git bisect start '46cddd0246ecca425a2d0f07f3102030665afc77'
'1a240d4de2ccf40de5796a4d1dbb3a0236051fc9'
# bad: [3cb49d22561ad4063856ad809b175478c1f09c8a] drm/i915: setup the hangcheck
timer early
git bisect bad 3cb49d22561ad4063856ad809b175478c1f09c8a
# good: [29bc0d33dcd509a87cfc6eaf4ac29ce6cc2df40b] drm/i915: Split
intel_ring_begin
git bisect good 29bc0d33dcd509a87cfc6eaf4ac29ce6cc2df40b
# bad: [7c7b4d55fb69f679c27f8ed056c6f304cd69c3b3] drm/i915: Set initial seqno
value close to wrap boundary
git bisect bad 7c7b4d55fb69f679c27f8ed056c6f304cd69c3b3
# good: [d2ef0e20dd0d6257526ad41b1b5bcfdc4cff4054] drm/i915: Add
intel_ring_handle_seqno wrap
git bisect good d2ef0e20dd0d6257526ad41b1b5bcfdc4cff4054</pre>
        </div>
      </p>
      <hr>
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      <ul>
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