Re: [RFC PATCH 07/15] nohz_task: Restart tick when RCU forces nohztask cpu quiescent state

[Peter Zijlstra]

On Mon, 2010-12-20 at 16:24 +0100, Frederic Weisbecker wrote:
> If a cpu is in nohz mode due to a nohz task running, then
> it is not able to notify quiescent states requested by other
> CPUs.
> 
> Then restart the tick to remotely force the quiescent states on the
> nohz task cpus.

-ENOPARSE.. if its in NOHZ state, it couldn't possibly need to
participate in the quiescent state machine because the cpu is in a
quiescent state and has 0 RCU activity.

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