On Wed, 2013-06-26 at 08:21 -0700, Tejun Heo wrote: > On Wed, Jun 26, 2013 at 10:51:11AM -0400, Steven Rostedt wrote: > > > It would also increase the latency of CPU-hotunplug operations. > > > > Is that a big deal? > > I thought that was the whole deal with this patchset - making cpu > hotunplugs lighter and faster mostly for powersaving. That said, just > removing stop_machine call would be a pretty good deal and I don't > know how meaningful reducing CPU hotunplug latency is. Srivatsa? 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. -- Steve -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
