[Bug 110848] Everything using GPU gets stuck after running+killing parallel Media loads (after running 3D benchmarks)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=110848

--- Comment #19 from Chris Wilson <chris at chris-wilson.co.uk> ---
The patch we identified as being problematic was reverted just before 5.2; tbf
I don't have a lot of confidence that was the only problematic patch in that
mm/ series.

e8f06c34fa..8991a80f85 does contain more fences, and so increased opportunity
for a missed wakeup. They would however be shown as processes stuck waiting for
a fence inside i915; whereas what your kernel stacks show are processes stuck
waiting for page io (if I read that correctly, generally from __dput).

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