Yes, only cgroup v1.
On 2023/3/25 1:11, Michal Koutný wrote:
Hello.
On Mon, Mar 20, 2023 at 03:06:48AM +0000, Cai Xinchen <caixinchen1@xxxxxxxxxx> wrote:
When memcg C is offllined, its pages are reparented to memcg P,
so far P->vmstats (hierarchical) have those pages, and
P->vmstats_percpu (non-hierarchical) don't. When those pages get
uncharged, P->vmstats (hierachical) decreases, which is correct,
but P->vmstats_percpu (non-hierarchical) also decreases, which
is wrong, as those stats were never added to P->vmstats_percpu to
begin with.
I was wondering why ->vmstats_percpu matters (in the end all is summed
in ->vmstats) -- do you mean this is a cgroup v1 only issue? As only
that exposes the non-hieararchical stats.
Thanks,
Michal
