[Bug 107850] [CI][DRMTIP] igt at gem_fence_thrash@bo-write-verify-threaded-[x|y|none] - fail - Failed assertion: tmp[j] == ~(i+ j), tiling y: write failed at 32752 (b7576eaf)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=107850

Chris Wilson <chris at chris-wilson.co.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #5 from Chris Wilson <chris at chris-wilson.co.uk> ---
commit 8cd999181f8c744c87fb64e7b3600876ec3428b2
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Mon Jan 14 21:17:27 2019 +0000

    drm/i915: Prevent concurrent GGTT update and use on Braswell (again)

    On Braswell, under heavy stress, if we update the GGTT while
    simultaneously accessing another region inside the GTT, we are returned
    the wrong values. To prevent this we stop the machine to update the GGTT
    entries so that no memory traffic can occur at the same time.

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