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    SubjectRe: Very high CPU load when idle with 3.0-rc1
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    On Mon, 2011-05-30 at 13:34 +0200, Peter Zijlstra wrote:
    > On Mon, 2011-05-30 at 07:59 +0200, Damien Wyart wrote:
    > > Hi,
    > >
    > > Testing 3.0-rc1 on a core i7 (4 cores + HT), I get a load average of 9.0
    > > when idle. No process is shown running or in "D state" in htop. The box
    > > is behaving normal, no impression of lag or slowness.
    > >
    > > Not sure what other info to include, I guess this should be quite easy
    > > to reproduce.
    >
    >
    > ---
    > Subject: rcu: Cure load woes
    >
    > Commit cc3ce5176d83 (rcu: Start RCU kthreads in TASK_INTERRUPTIBLE
    > state) fudges a sleeping task' state, resulting in the scheduler seeing
    > a TASK_UNINTERRUPTIBLE task going to sleep, but a TASK_INTERRUPTIBLE
    > task waking up. The result is unbalanced load calculation.

    (darn, 'which' poked me in the eye, but 'how' didn't)

    Yup, all better.

    -Mike



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