Comment # 1 on bug 91753 from Emil Velikov

This commit has already been reverted and will be part of 11.0.0-rc2.

commit a83c36b5c0c64c717ced76db89bab900006648aa
Author: Marek Olšák <marek.olsak@amd.com>
Date:   Sun Aug 23 18:57:44 2015 +0200

    Revert "radeon/winsys: increase the IB size for VM"

    This reverts commit 567394112d904096abff1d994ab952f475dfb444.

    It regressed performance. It looks like smaller IBs are better, because
    the GPU goes idle quicker and there is less waiting for buffers and fences.

    Cc: 11.0 <mesa-stable@lists.freedesktop.org>