Hello, Waiman. On Fri, Jul 05, 2024 at 08:56:21PM -0400, Waiman Long wrote: > The /proc/cgroups file shows the number of cgroups for each of the > subsystems. With cgroup v1, the number of CSSes is the same as the > number of cgroups. That is not the case anymore with cgroup v2. The > /proc/cgroups file cannot show the actual number of CSSes for the > subsystems that are bound to cgroup v2. > > So if a v2 cgroup subsystem is leaking cgroups (typically memory > cgroup), we can't tell by looking at /proc/cgroups which cgroup > subsystems may be responsible. This patch adds a css counter in the > cgroup_subsys structure to keep track of the number of CSSes for each > of the cgroup subsystems. The count sounds useful to me but can we add it in cgroup.stats instead? Thanks. -- tejun
