Messages in this thread | | | Date | Sun, 12 Feb 2017 16:23:36 +0100 (CET) | From | Thomas Gleixner <> | Subject | Re: [PATCH v6] fork: free vmapped stacks in cache when cpus are offline |
| |
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 <hoeun.ryu@gmail.com> > Acked-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
| |