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SubjectRe: [PATCH -next] cgroup: don't call cgroup1_pidlist_destroy_all() for v2
Hello,

On Wed, Apr 17, 2024 at 02:13:59AM +0000, Xiu Jianfeng wrote:
> From: Xiu Jianfeng <xiujianfeng@huawei.com>
>
> Currently cgroup1_pidlist_destroy_all() will be called when releasing
> cgroup even if the cgroup is on default hierarchy, however it doesn't
> make any sense for v2 to destroy pidlist of v1.
>
> Signed-off-by: Xiu Jianfeng <xiujianfeng@huawei.com>
> ---
> kernel/cgroup/cgroup-v1.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/kernel/cgroup/cgroup-v1.c b/kernel/cgroup/cgroup-v1.c
> index 520a11cb12f4..46d89157d558 100644
> --- a/kernel/cgroup/cgroup-v1.c
> +++ b/kernel/cgroup/cgroup-v1.c
> @@ -197,6 +197,8 @@ void cgroup1_pidlist_destroy_all(struct cgroup *cgrp)
> {
> struct cgroup_pidlist *l, *tmp_l;
>
> + if (cgroup_on_dfl(cgrp))
> + return;

Can you move the test to the caller?

Thanks.

--
tejun

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