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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [Not CI][GM45] igt@gem_mmap_gtt@basic-small-bo-tiledx - fail - Failed assertion: memcmp(ptr , tiled_pattern, PAGE_SIZE) == 0 (edit)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=106848">106848</a>
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<th>Summary</th>
<td>[Not CI][GM45] igt@gem_mmap_gtt@basic-small-bo-tiledx - fail - Failed assertion: memcmp(ptr , tiled_pattern, PAGE_SIZE) == 0 (edit)
</td>
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<th>Product</th>
<td>DRI
</td>
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<th>Version</th>
<td>DRI git
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<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
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<th>OS</th>
<td>Linux (All)
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>major
</td>
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<th>Priority</th>
<td>medium
</td>
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<th>Component</th>
<td>DRM/Intel
</td>
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
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<th>Reporter</th>
<td>promarbler14@gmail.com
</td>
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
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<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
<p>
<div>
<pre>Copying from the comment made on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [BAT][GDG] igt@gem_mmap_gtt@basic-small-bo-tiledx - fail - Failed assertion: memcmp(ptr , tiled_pattern, PAGE_SIZE) == 0"
href="show_bug.cgi?id=102575">bug #102575</a> to here.
<span class="quote">> Pardon my intrusion.
>
> Running subtest basic-small-bo-tiledX with latest igt-gpu-tools
> (1.22+173+gf560ae5a-1) and drm-tip (4.17rc6+1560+g9d5095539d5f+755171-1)
> yields high failure rates on my GM45: out of 1000 iterations, only 360 are
> successful.
>
> Neither basic-small-bo-tiledY nor basic-small-bo have any failures with 100
> iterations each.
>
> Platform:
> Dell Inspiron 1545
> Eagle Lake / Core2Duo (Pentium(R) Dual-Core CPU T4200 @ 2.00GHz) / GMA4500
> LVDS (VGA)
>
> I tested it out of curiosity to its relation to my other bug. [#103025]</span >
In my own investigation I have found the failure to start between kernels 4.7
and 4.8, making it easy to bisect. I haven't finished the bisect yet, but I
believe there is some relation to the mm's compaction and oom changes that were
made around that time; as I recall, it took quite a bit of time to get those mm
changes working right.
I can have the bisect results within a day.</pre>
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