On Wed, Sep 27, 2023 at 2:25 AM Tejun Heo <tj@xxxxxxxxxx> wrote: > > Hello, > > On Tue, Sep 26, 2023 at 11:01:08AM +0800, Yafang Shao wrote: > > Thanks for your suggestion. I will think about it. > > BTW, I can't find the hierarchy ID of systemd (/sys/fs/cgroup/systemd) > > in /proc/cgroups. Is this intentional as part of the design, or might > > it be possible that we overlooked it? > > In the userspace, where can we find the hierarchy ID of a named hierarchy? > > Yeah, /proc/cgroups only prints the hierarchies which have controllers > attached to them. The file is pretty sad in general. However, > /proc/PID/cgroup prints all existing hierarchies along with their IDs and > identifiers (controllers or names). Hopefully, that should be enough? Right, /proc/self/cgroup can show the hierarchies. Thanks for your explanation. -- Regards Yafang
