Messages in this thread | | | Date | Wed, 26 Jun 2013 10:29:48 -0700 | From | Tejun Heo <> | Subject | Re: [PATCH v2 15/45] rcu: Use get/put_online_cpus_atomic() to prevent CPU offline |
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Hello,
On Wed, Jun 26, 2013 at 11:33:43AM -0400, Steven Rostedt wrote: > I thought the whole deal with this patchset was to remove stop_machine > from CPU hotplug. Why halt all CPUs just to remove one? stomp_machine() > is extremely intrusive for the entire system, where as one CPU making > sure all CPUs schedule isn't very intrusive at all. > > I didn't think the idea of this patch set was to make CPU hotplug > faster, just less intrusive to the system.
Yeap, removal of stop_machine is a great improvement in itself. ISTR mentions of hot-unplug latency but I could be mistaken. Srivatsa, can you please chime in on that?
Thanks.
-- tejun
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