Slower 3D with kernel 4.11.x

[Daniel Mota Leite <daniel@motaleite.net>]

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Hi

	I upgraded a few weeks ago to kernel 4.11.x from 4.10.x and
notice a drop in performance in my AMD RX480, using mesa 17.2-dev
and a A10-7890k APU

	the worst example is Mad Max, with vulkan i get about 80fps
in 4.10, but about 25fps in 4.11. using openGL, i get about 50fps
on 4.10 and about 21 fps on 4.11.

	I also notice this on war thunder, 35fps vs 25fps. On war thunder
i also notice that the GPU load is about 75% on 4.10 and 60% 4.11.

	My upgrade from 4.10 to 4.11 was make oldconfig and choose
the recomended new settings.

	So did anyone else notice any problem? can i check anything
first before trying a long bisect to the kernel?

Thanks in advance for the help

higuita
-- 
Naturally the common people don't want war... but after all it is the
leaders of a country who determine the policy, and it is always a 
simple matter to drag the people along, whether it is a democracy, or
a fascist dictatorship, or a parliament, or a communist dictatorship.
Voice or no voice, the people can always be brought to the bidding of
the leaders. That is easy. All you have to do is tell them they are 
being attacked, and denounce the pacifists for lack of patriotism and
exposing the country to danger.  It works the same in every country.
           -- Hermann Goering, Nazi and war criminal, 1883-1946

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