[Bug 94141] [HSW] GPU HANG: ecode 7:0:0xf3cffffe, in chrome. Introduced between 4.1.0 and 4.4.0.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94141

--- Comment #4 from Chris Wilson <chris at chris-wilson.co.uk> ---
First thought, it is dying when loading the current context. That reminds me of

https://cgit.freedesktop.org/~ickle/linux-2.6/commit/?h=breadcrumbs&id=b7d9d4bf1fee923b1d546b9f0cdd9ad549352dc6

commit 9c5230ec40288f9f96ba315227a1ff559366eed4
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Tue Dec 29 21:02:02 2015 +0000

    drm/i915: Skip MI_SET_CONTEXT for the same context

    Fixes regression from

    commit 71b7e54f71b899db9f8def67a0e976969384e699
    Author: Daniel Vetter <daniel.vetter at ffwll.ch>
    Date:   Tue Apr 14 17:35:18 2015 +0200

        drm/i915: Don't look at pg_dirty_rings for aliasing ppgtt

    Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

71b7e54f71b899db9f8def67a0e976969384e699 -> 4.2-rc1

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