On Tue, Aug 16, 2022 at 7:01 PM Yang Shi <shy828301@xxxxxxxxx> wrote: > > On Tue, Aug 16, 2022 at 3:06 PM Shakeel Butt <shakeelb@xxxxxxxxxx> wrote: > > > > On Tue, Aug 16, 2022 at 11:58 AM Yang Shi <shy828301@xxxxxxxxx> wrote: > > > > > > Workingset refault stats are important and usefule metrics to measure > > > how well reclaimer and swapping work and how healthy the services are, > > > but they are just available for cgroup v2. There are still plenty users > > > with cgroup v1, export the stats for cgroup v1. > > > > > > Signed-off-by: Yang Shi <shy828301@xxxxxxxxx> > > > --- > > > I do understand the development of cgroup v1 is actually stalled and > > > the community is reluctant to accept new features for v1. However > > > the workingset refault stats are really quite useful and exporting > > > two new stats, which have been supported by v2, seems ok IMHO. So > > > hopefully this patch could be considered. Thanks. > > > > > > > Is just workingset refault good enough for your use-case? What about > > the other workingset stats? I don't have a strong opinion against > > adding these to v1 and I think these specific stats should be fine. > > The workingset refault is good enough for our usercase, but I don't > mind adding all the workingset_* stats if nobody has objection. For now let's just start with what your use-case needs. If in future there is a need we can add other workingset_* stats as well. > > > (There is subtlety in exposing objcg based stats (i.e. reparenting) in > > v1 due to non-hierarchical stats in v1. I remember Yosry and Muchun > > were looking into that.) > > The workingset_* stats should have nothing to do with obj based stats IIUC. Yeah, that was just FYI for anyone in future who wants to export such stat in v1.
