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SubjectRe: [PATCH] hotplug: Optimize {get,put}_online_cpus()
On Mon, Sep 23, 2013 at 11:59:08AM -0400, Steven Rostedt wrote:
> On Mon, 23 Sep 2013 17:22:23 +0200
> Peter Zijlstra <peterz@infradead.org> wrote:
>
> > Still no point in using srcu for this; preempt_disable +
> > synchronize_sched() is similar and much faster -- its the rcu_sched
> > equivalent of what you propose.
>
> To be honest, I sent this out last week and it somehow got trashed by
> my laptop and connecting to my smtp server. Where the last version of
> your patch still had the memory barrier ;-)

Ah, ok, yes in that case things start to make sense again.


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