[Bug 103025] [GM45] loss of driver acceleration after some time

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=103025

--- Comment #4 from Chris Wilson <chris at chris-wilson.co.uk> ---
(In reply to Adric Blake from comment #3)
> uptime: over 5 days
> xorg-server 1.19.3-3         
> xf86-video-intel 1:2.99.917+781+gc8990575-1
> mesa 17.2.1-3
> libdrm 2.4.83-1
> linux 4.13.4-1 (Arch Linux stock kernel -- vanilla, with no new drm-tip
> patches)
> 
> No sign of the issue on the 4.13.4 kernel.
> 
> There is no released 4.14 or 4.15 kernel right now, so I'm not quite sure
> what you meant by your last suggestion. I was using the latest drm-tip
> kernel at the time.

That was me misreading (the "way back when I was testing drm-tip" stuck in my
head).

> I will check to see if the issue emerges in the 4.14-rc3 kernel *without*
> the latest drm-tip changes to try and identify the responsible party further.

Ta. That's the next one, it narrows it down to the previous cycle or this one.
Though bisection is viable at this point. I can guess it will be

commit d1b48c1e7184d9bc4ae6d7f9fe2eed9efed11ffc
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Wed Aug 16 09:52:08 2017 +0100

    drm/i915: Replace execbuf vma ht with an idr

though quite unexpected. If you have the patient, compiling xf86-video-intel
with --enable-debug=full should result in the erroroneous submit being dumped.

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