Re: [PATCH v4] sched: automated per session task groups

Ingo Molnar
2010-11-29T16:44:47Z

* Linus Torvalds <torvalds@linux-foundation.org> wrote:

> On Mon, Nov 29, 2010 at 3:53 AM, Peter Zijlstra <a.p.zijlstra@chello.nl> wrote:
> >
> > Well we totally re-wrote the cgroup load-balancer in -tip. The thing currently
> > in -linus is a utter crap because its very strongly serialized across all cores
> > (some people spend like 25% of their time in there).
>
> Well, it seems that the rewrite is more crap than the "utter crap" in current
> -git. What does that make -tip? Super-utter-crap?

Something along that line, or worse.

> Peter - getting the wrong answer quickly is not any better than strong
> serialization.

Yeah, obviously.

> Anyway, I'm happy to hear that the problem hasn't reached mainline yet.

It wont.

Thanks,

Ingo