On Thu, Feb 18, 2021 at 04:45:11PM +0100, Michal Koutný wrote:

On Wed, Feb 17, 2021 at 03:52:59PM -0500, Johannes Weiner [off-list ref] wrote:

quoted

In this case, we're talking about a relatively small data structure
and the overhead is per mountpoint.

IIUC, it is per each mountpoint's number of cgroups. But I still accept
the argument above. Furthermore, this can be changed later.

Oops, you're right of course.

quoted

The default root group has statically preallocated percpu data before
and after this patch. See cgroup.c:

I stand corrected, the comment is still valid.

Therefore,
Reviewed-by: Michal Koutný <mkoutny@suse.com>

Thanks for your reviews, Michal!