On Sun, 12 Feb 2017, Hoeun Ryu wrote: > Using virtually mapped stack, kernel stacks are allocated via vmalloc. > In the current implementation, two stacks per cpu can be cached when > tasks are freed and the cached stacks are used again in task duplications. > but the cached stacks may remain unfreed even when cpu are offline. > By adding a cpu hotplug callback to free the cached stacks when a cpu > goes offline, the pages of the cached stacks are not wasted. > > Signed-off-by: Hoeun Ryu <[email protected]> > Acked-by: Michal Hocko <[email protected]>
Reviewed-by: Thomas Gleixner <[email protected]>
