[Mesa-stable] nominate 55a97db5234 for 17.3

Kenneth Graunke kenneth at whitecape.org
Tue Mar 6 03:03:48 UTC 2018

Hi Emil,

Can you please cherry-pick this commit to 17.3?  It fixes GPU hangs.
Apparently there was not a Bugzilla, and I neglected to mark it with
Fixes or Cc (my mistake!).  I haven't seen a huge number of affected
apps with this, so it likely doesn't warrant an emergency release or
anything...we'll just hit the next one.  Thanks!

commit 55a97db52347f62111a24715078c6035380d3e19
Author: Kenneth Graunke <kenneth at whitecape.org>
Date:   Tue Oct 31 09:57:54 2017 -0700

    i965: Emit CS stall before MEDIA_VFE_STATE.
    This fixes hangs on GFXBench 5's Aztec Ruins benchmark.
    Unfortunately, it regresses OglCSCloth performance by about 10%. There
    are some ideas for fixing that.
    The Vulkan driver already emits this stall.
    Reviewed-by: Matt Turner <mattst88 at gmail.com>
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