[Bug 102577] [BAT][GDG] Failed assertion: gtt[1024*i] == ~i in igt at prime_vgem@basic-gtt

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=102577

--- Comment #4 from Chris Wilson <chris at chris-wilson.co.uk> ---
For a similar issue within the kernel (i.e. not this test but others):
commit c5ba5b24657e473b1c64b0a614b168a635a2c935
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Thu Sep 7 19:45:20 2017 +0100

    drm/i915: Apply the GTT write flush for all !llc machines

    We also see the delayed GTT write issue on i915g/i915gm, so let's
    presume that it is a universal problem for all !llc machines, and that we
    just haven't yet noticed on g33, gen4 and gen5 machines.

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