On Fri 05-07-19 17:41:44, Yafang Shao wrote: > On Fri, Jul 5, 2019 at 5:09 PM Michal Hocko <mhocko@xxxxxxxxxx> wrote: [...] > > Why cannot you move over to v2 and have to stick with v1? > Because the interfaces between cgroup v1 and cgroup v2 are changed too > much, which is unacceptable by our customer. Could you be more specific about obstacles with respect to interfaces please? > It may take long time to use cgroup v2 in production envrioment, per > my understanding. > BTW, the filesystem on our servers is XFS, but the cgroup v2 > writeback throttle is not supported on XFS by now, that is beyond my > comprehension. Are you sure? I would be surprised if v1 throttling would work while v2 wouldn't. As far as I remember it is v2 writeback throttling which actually works. The only throttling we have for v1 is reclaim based one which is a huge hammer. -- Michal Hocko SUSE Labs
