Re: [PATCH v5] fork: free vmapped stacks in cache when cpus are offline

2017-02-12 Thread Thomas Gleixner
On Sun, 12 Feb 2017, Hoeun Ryu wrote: > > > On Feb 12, 2017, at 5:19 AM, Thomas Gleixner wrote: > > > >> On Sat, 11 Feb 2017, kbuild test robot wrote: > >> > >> Hi Hoeun, > >> > >> [auto build test ERROR on linus/master] > >> [also build test ERROR on v4.10-rc7 next-20170210] > >> [if your pat

Re: [PATCH v5] fork: free vmapped stacks in cache when cpus are offline

2017-02-11 Thread Hoeun Ryu
> On Feb 12, 2017, at 5:19 AM, Thomas Gleixner wrote: > >> On Sat, 11 Feb 2017, kbuild test robot wrote: >> >> Hi Hoeun, >> >> [auto build test ERROR on linus/master] >> [also build test ERROR on v4.10-rc7 next-20170210] >> [if your patch is applied to the wrong git tree, please drop us a note

Re: [PATCH v5] fork: free vmapped stacks in cache when cpus are offline

2017-02-11 Thread Thomas Gleixner
On Sat, 11 Feb 2017, kbuild test robot wrote: > Hi Hoeun, > > [auto build test ERROR on linus/master] > [also build test ERROR on v4.10-rc7 next-20170210] > [if your patch is applied to the wrong git tree, please drop us a note to > help improve the system] > > url: > https://github.com/0da

Re: [PATCH v5] fork: free vmapped stacks in cache when cpus are offline

2017-02-11 Thread kbuild test robot
Hi Hoeun, [auto build test ERROR on linus/master] [also build test ERROR on v4.10-rc7 next-20170210] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Hoeun-Ryu/fork-free-vmapped-stacks-in-cache-wh

[PATCH v5] fork: free vmapped stacks in cache when cpus are offline

2017-02-11 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 cpus are offline. By adding a c