https://bugs.freedesktop.org/show_bug.cgi?id=91278

--- Comment #32 from Andy Furniss <adf.lists@gmail.com> ---
(In reply to Mathias Tillman from comment #31)
> Small update: I have been able to run it for a total of 7 hours (2 + 2 + 3)
> without a hang on the latest drm-next-4.4-wip. Tried the latest
> drm-fixes-4.3 and it hung after about 30 minutes, so I definitely think
> there's something in 4.4 that fixes it. I will do a bisect to see if I can
> figure out what, more exactly, is the fix.

I'll try over the weekend - no locks so far.

Bisecting would be a pain for me as I managed to very long lucky runs
previously, so wouldn't be able to easily call good.

I notice that enable_scheduler is now on by default, maybe flipping that would
be quicker than bisect. Long ago I did try some older kernel with that enabled
and though it didn't fix IIRC it took longer to lock than was normal at that
time.

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