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    SubjectRe: 2.6.32 cgroup regression
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    On Tue, 2010-08-31 at 16:25 +0900, Minoru Usui wrote:
    > Hi, Mike
    >
    > On Wed, 25 Aug 2010 07:56:01 +0200
    > Mike Galbraith <efault@gmx.de> wrote:
    >
    > > On Tue, 2010-08-24 at 13:10 -0700, Josh Hunt wrote:
    > > > This commit makes the ltp cpuctl latency test #2 hang indefinitely:
    > > >
    > > > commit b5d9d734a53e0204aab0089079cbde2a1285a38f
    > > > Author: Mike Galbraith <efault@gmx.de>
    > > > Date: Tue Sep 8 11:12:28 2009 +0200
    > > >
    > > > sched: Ensure that a child can't gain time over it's parent after fork()
    > >
    > > Ouch. Yeah, that commit is buggy, and never got fixed up in stable.
    > > Reverting it will restore a slightly less buggy, but not very good
    > > situation. Getting the fork problems all fixed up took a while.
    > > (quick fix vs revert didn't help your testcase)
    >
    > I'm interested in this problem, because I hit the same problem in RHEL6 beta2.
    > (It based on 2.6.32)
    >
    > Are you writing a patch to solving this problem?

    No, the necessary patches were already written. I just needed to
    backport. Illness and squabbles with git sendemail (i lost) held me up.

    > If you are doing, I can test it in RHEL6 beta2 (or latest).

    I just sent a 50 patch series, ever so lovingly git am applied. git
    format-patch exported, then imported into evolution one darn patch at a
    time, to stable to either apply or bin as maintainers see fit. To test,
    all you should need to do is test mainline. If you'd like a quilt
    tarball against 32.21 anyway, just holler.

    The series has all the fork/exec/wakeup/hotplug yada yada fixes I think
    are mana from heaven for our long-term stable kernel. I may well get
    "are you outta yer ever lovin' mind?" back, but _I_ think it's needed,
    so...

    -Mike



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