Re: [RFC PATCH 2/3] cgroup: Rely on namespace_sem in current_cgns_cgroup_from_root explicitly

[Tejun Heo]

Hello,

On Tue, May 23, 2023 at 12:42:46PM +0200, Christian Brauner wrote:
...
> Nope, we're not putting namespace_sem in a header. The code it protects
> is massively sensitive and it interacts with mount_lock and other locks.
> This stays private to fs/namespace.c as far as I'm concerned.

Michal, would it make sense to add a separate locking in cgroup.c? It'll add
a bit more overhead but not massively so and we should be able to get
similar gain without entangling with namespace locking.

Thanks.

-- 
tejun