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<body><span class="vcard"><a class="email" href="mailto:eero.t.tamminen@intel.com" title="Eero Tamminen <eero.t.tamminen@intel.com>"> <span class="fn">Eero Tamminen</span></a>
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<a class="bz_bug_link
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title="ASSIGNED - [BDW Bisected]igt/gem_close_race/process-exit causes system hang with OOM Killer, when true PPGTT enabled"
href="https://bugs.freedesktop.org/show_bug.cgi?id=87477">bug 87477</a>
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<td>valtteri.rantala@intel.com
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<b><a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - [BDW Bisected]igt/gem_close_race/process-exit causes system hang with OOM Killer, when true PPGTT enabled"
href="https://bugs.freedesktop.org/show_bug.cgi?id=87477#c9">Comment # 9</a>
on <a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - [BDW Bisected]igt/gem_close_race/process-exit causes system hang with OOM Killer, when true PPGTT enabled"
href="https://bugs.freedesktop.org/show_bug.cgi?id=87477">bug 87477</a>
from <span class="vcard"><a class="email" href="mailto:eero.t.tamminen@intel.com" title="Eero Tamminen <eero.t.tamminen@intel.com>"> <span class="fn">Eero Tamminen</span></a>
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<pre>(In reply to Rodrigo Vivi from <a href="show_bug.cgi?id=87477#c7">comment #7</a>)
<span class="quote">> I couldn't reproduce on my BDW either.</span >
We've seen this in our testing, 100% reproducible. Seeing the OOM requires:
1. Java process mapping GBs of memory in large anonyous mappings (of which only
few tens of MB are actually used) in total
2. Ubuntu 14.04 or 14.10 as those have version of Unity "compiz" compositor,
which leaks Windows references on every window close
3. Running SynMark GL context recreation test about dozen times after boot
Without 1), seeing the OOM kill took hundred(s) of repeats of step 3).
slabtop shows vm struct slabs growing slowly, first I thought that to be the
kernel issue, but I think compiz leak explains that. There's something with
the graphics driver which dislikes a lot of memory being mapped while there's a
small leak for handles.</pre>
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