[Bug 101294] radeonsi minecraft forge splash freeze since 17.1

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101294

--- Comment #6 from Fabian Maurer <dark.shadow4 at web.de> ---
Bisected to
commit 2769dadb0fafdbafc98630fdf96924a3bb209ab7
Author: Marek Olšák <marek.olsak at amd.com>
Date:   Thu Apr 13 23:46:59 2017 +0200

    gallium/radeon: always flush asynchronously and wait after begin_new_cs

    This hides the overhead of everything in the driver after the CS flush and
    before returning from pipe_context::flush.
    Only microbenchmarks will benefit.

    +2% FPS for glxgears.

    Reviewed-by: Nicolai Hähnle <nicolai.haehnle at amd.com>


Reverting this commit on the recent git tree fixes the freezes.
Now since the bug doesn't always appear, I'm not 100% sure, but I didn't get a
single freeze in 20 runs, while I got 13 out of 20 without reverting it.


Could you maybe look into this? I have no idea how to fix the issue without
throwing away all changes from this commit.

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