Re: [RFC PATCH 10/15] nohz_task: Enter in extended quiescent statewhen in userspace

[Peter Zijlstra]

On Mon, 2010-12-20 at 16:24 +0100, Frederic Weisbecker wrote:
> (we check if the local cpu is in nohz mode, which means
> no other task compete on that CPU)

You keep repeating that definition, but its not true.. It means there is
not work for the tick to do, the tick does _tons_ more besides
preemption, so nr_running==1 is necessary but not sufficient. 
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