On Sun, Aug 06, 2017 at 05:53:37AM +0000, Ofer Levi(SW) wrote: > I'm adding hot-plug support for the above arch and ran into performance issue > with execution of > partition_sched_domains () - About 0.5 sec per cpu, which is unacceptable > with the arch supported 4k cpus. > To my limited understanding, on the plat-eznps arch, where each cpu is always > running a single threaded process in > isolation mode, the above call is not necessary, > Can you please confirm (or reject) my understanding? If I'm wrong short > explanation will be appreciated. > If I'm correct, I will be grateful if you can point me to how to skip this > call in a way acceptable by community.
You've failed to explain why you think hotplug should be a performance critical path. I'm also not seeing how it would be different from boot; you'd be looking at a similar cost for SMP bringup.
