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SubjectLinus, please revert 7dc8f11437: regression in 5.7-rc0, hangs while attempting to run X

On Fri 2020-04-03 15:00:31, Pavel Machek wrote:
> Hi!
>
> 7dc8f1143778a35b190f9413f228b3cf28f67f8d
>
> drm/i915/gem: Drop relocation slowpath
>
> Since the relocations are no longer performed under a global
> struct_mutex, or any other lock, that is also held by pagefault handlers,
> we can relax and allow our fast path to take a fault. As we no longer
> need to abort the fast path for lock avoidance, we no longer need the
> slow path handling at all.
>
> causes regression on thinkpad x220: instead of starting X, I'm looking
> at blinking cursor.
>
> Reverting the patch on too of 919dce24701f7b3 fixes things for me.

I have received no feedback from patch authors, and I believe we don't
want to break boot in -rc1 on Intel hardware... so the commit should
be simply reverted.

Best regards,
Pavel

--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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