Re: [BUG] 2.6.37-rc3 massive interactivity regression on ARM

Linus Walleij
2010-12-08T15:43:57Z

2010/12/8 Peter Zijlstra <a.p.zijlstra@chello.nl>:

> Like said, John Stultz was already looking at doing something like that
> because there's a number of architectures suffering this same problem
> and they're all already using part of the clocksource infrastructure to
> implement the sched_clock() interface simply because they only have a
> single hardware resource.

I was in on that discussion and for the Ux500 this patch was the
outcome:
http://www.arm.linux.org.uk/developer/patches/viewpatch.php?id=6488/1

It seems to work, mostly, it's based off Nico's orion code and
just tries to make everything as explicit as possible.

Uwe has also been onto it I think.

Yours,
Linus Walleij