Comment 81 for bug 727594

Bryce, I'm confident that Knut identified the same issue and so disabling relaxed-fencing for the release should fix these as well. (I have lingering doubts since we tried the obvious kernel workarounds, but then again I think we may have a fundamental bug in our allocation ala gen2.) Obviously, if I am wrong, let's open the bug again.

commit 686018f283f1d131073ef5917213e6a8ac013f26
Author: Chris Wilson <email address hidden>
Date: Tue Apr 12 08:23:04 2011 +0100

    Turn relaxed-fencing off by default for older (pre-G33) chipsets

    There are still too many unresolved bugs, typically GPU hangs, that are
    related to using relaxed fencing (i.e. only allocating the minimal
    amount of memory required for a buffer) on older hardware, so turn off
    the feature by default for the release.

    Reported-and-tested-by: Knut Petersen <email address hidden>
    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=36147
    Signed-off-by: Chris Wilson <email address hidden>
    Acked-by: Daniel Vetter <email address hidden>