Re: [PATCH v6] fork: free vmapped stacks in cache when cpus are offline

2017-02-12 Thread Thomas Gleixner
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 unf

[PATCH v6] fork: free vmapped stacks in cache when cpus are offline

2017-02-12 Thread Hoeun Ryu
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 cp