[Bug 88207] [hsw] GPU HANG: ecode 0:0x84dfbffe, in cubestorm [28178], reason: Ring hung, action: reset

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=88207

--- Comment #3 from Alejandro Piñeiro (freenode IRC: apinheiro) <apinheiro at igalia.com> ---
The bug is already fixed on master. I bisected, and it got solved with this
commit:

commit 02ca66fbc3e2b272afcb9bae66348d3b1900e2c3
Author: Kenneth Graunke <kenneth at whitecape.org>
Date:   Thu Aug 21 14:41:17 2014 -0700

    i965: Use unsynchronized maps for the program cache on LLC platforms.

    There's no reason to stall on pwrite - the CPU always appends to the
    buffer and never modifies existing contents, and the GPU never writes
    it.  Further, the CPU always appends new data before submitting a batch
    that requires it.

    This code predates the unsynchronized mapping feature, so we simply
    didn't have the option when it was written.

    Ideally, we would do this for non-LLC platforms too, but unsynchronized
    mapping support only exists for LLC systems.

    Saves a bunch of stall avoidance copies when uploading shaders.

    v2: Rebase on changes to previous patch.

    Signed-off-by: Kenneth Graunke <kenneth at whitecape.org>
    Reviewed-by: Kristian Høgsberg <krh at bitplanet.net> [v1]


Should I close the bug?

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