Re: [PATCH v4 0/5] cgroup/cpuset: Fix CLONE_INTO_CGROUP problem & other issues

[Waiman Long]

On 4/12/23 14:26, Tejun Heo wrote:
> On Tue, Apr 11, 2023 at 09:35:56AM -0400, Waiman Long wrote:
> >   v4:
> >    - Add missing rcu_read_lock/unlock to cpuset_cancel_fork() in patch 3.
> >    - Add patch 5 to reduce performance impact for the
> >      non-CLONE_INTO_CGROUP case.
> >
> >   v3:
> >    - Update patches 2 & 3 to put task_cs() call under rcu_read_lock().
> >
> >   v2:
> >    - Drop v1 patch 3
> >    - Add a new patch to fix an issue in cpuset_cancel_attach() and
> >      another patch to add cpuset_can_fork() and cpuset_cacnel_fork()
> >      methods.
> >
> > The first patch in this series fixes a problem in
> > cpuset_cancel_attach(). Patches 2 and 3 fixes the CLONE_INTO_CGROUP
> > problem in cpuset. Patch 4 is a minor fix. The last patch is a
> > performance optimization patch for the non-CLONE_INTO_CGROUP case.
> Applied 1-4 to cgroup/for-6.3-fixes w/ stable cc'd. Given that the fixes are
> a bit involved, the breakages have been there for quite a while and the
> cpuset code has changed quite a bit, backporting might not be trivial tho.
> Let's see how that goes.

I know stable backport won't be straight forward. I am planning to help 
in the backporting effort. Thanks for taking these into your cgroup tree.

Cheers,
Longman