On Fri, Aug 13, 2021 at 05:25:12PM +0800, yukuai (C) wrote:
> We want to support that configuration in parent cgroup will work on
> child cgroup in cgroup v1. The feature was once supported and was
> reverted in commit 67e9c74b8a87 ("cgroup: replace __DEVEL__sane_behavior
> with cgroup2 fs type").
>
> Switching to cgroup v2 can support that, however, the cost is too high
> because all of our products are using v1, and there's a big difference
> in usage between v1 and v2.
>
> My question is that why is the feature reverted in cgroup v1? Is it
> because there are some severe problems? If not, we'll try to backport
> the feature to cgroup v1 again.
Because __DEVEL__sane_behavior, as the name clearly indicates, was a
temporary development vehicle to gradually implement cgroup2 and not
an official user-facing feature.
I have a hard time imagining backporting and maintaining that being
less painful than moving the users to cgroup2 but that's for you guys
to decide.
Thanks.
--
tejun
