[Bug 100587] [CI]gem_mmap_gtt/coherency failing assertion cpu[x] == i

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=100587

--- Comment #30 from Chris Wilson <chris at chris-wilson.co.uk> ---
(In reply to Chris Wilson from comment #29)
> Different test; hosts that don't show the coherency issue in the specific
> test for it => different bug.

For example, our previous issue was that the indirect write via the GGTT was
being buffered, but in this case it's the WC writes that aren't immediately
visible. The first half of the loop (writing into GTT, reading via WC) works
without any sync.

Argh!

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