Re: [PATCH-cgroup 1/2] cgroup: Show # of subsystem CSSes in /proc/cgroups

[Tejun Heo]

Hello,

On Mon, Jul 08, 2024 at 03:01:39PM -0400, Waiman Long wrote:
> That information is certainly useful to display to cgroup.stat which
> currently only shows nr_descendants and nr_dying_descendants. So does
> "nr_<subsys_name> <cnt>" for each cgroup subsystems look good to you or do
> you have other suggestion?

Yeah, something like that. Johannes, what do you think?

> The reason for this patch is because I got a bug report about leaking blkio
> cgroup due to the information shown in /proc/cgroups. I know you want do
> deprecate it for cgroup v2. How about adding a iine like "# Deprecated for
> cgroup v2, use cgroup.stats file for cgroup counts" at the top of
> /proc/cgroups when cgroup v2 is active?

I wonder whether that would break some parsers but we can try that and see
what happens.

Thanks.

-- 
tejun