Re: [PATCH] cgroup: fix attach task fail when subtree_control configured

[Tejun Heo]

On Fri, Apr 08, 2022 at 06:23:14PM +0800, zhaoyang.huang wrote:
> From: Zhaoyang Huang <zhaoyang.huang@xxxxxxxxxx>
> 
> It is found that task attach to a vacant cgroup will fail when its
> subtree_control has been configured. Fix it by judging if there is no chrildren
> existed.
> 
> Signed-off-by: Zhaoyang Huang <zhaoyang.huang@xxxxxxxxxx>

If I'm not misunderstanding, that's the intended behavior. Can you please
take a look at Documentation/admin-guide/cgroup-v2.rst and confirm what
you're trying to do?

Thanks.

-- 
tejun