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From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Mon, 29 Nov 2010 08:27:40 -0800
Message-ID: <AANLkTimQ2Kp2=um9ip7J2=-joskmz4P-0b_SrexFbTh0@mail.gmail.com>
Subject: Re: [PATCH v4] sched: automated per session task groups
To: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Ingo Molnar <mingo@elte.hu>, Mike Galbraith <efault@gmx.de>,
        Oleg Nesterov <oleg@redhat.com>, LKML <linux-kernel@vger.kernel.org>,
        Paul Turner <pjt@google.com>
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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?

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

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

                    Linus
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