Re: CPU Hotplug rework

From: Steven Rostedt
Date: Mon Mar 26 2012 - 09:09:49 EST

On Mon, 2012-03-26 at 10:02 +0200, Peter Zijlstra wrote:
> On Mon, 2012-03-26 at 11:11 +1030, Rusty Russell wrote:
> > Obviously, having callbacks hanging around until the CPU comes back is
> > not viable, nor is blocking preempt during the callbacks. Calling
> > get_online_cpus() is too heavy.
> -rt has patches (albeit somewhat ugly) to make get_online_cpus() a br
> style rw-lock.

Unfortunately, -rt still has broken cpu hotplug.

-- Steve

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