On 06/26/2013 08:51 PM, 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? >
Keeping the hotunplug latency is important for suspend/resume, where we take all non-boot CPUs in a loop. That's an interesting use-case where intrusiveness doesn't matter much, but latency does. So yes, making CPU hotplug faster is also one of the goals of this patchset. Regards, Srivatsa S. Bhat _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
