Re: [PATCH 04/16] mm/migration: reduce the rcu lock duration

[Muchun Song]

On Fri, Mar 4, 2022 at 5:35 PM Miaohe Lin <linmiaohe@xxxxxxxxxx> wrote:
>
> rcu_read_lock is required by grabbing the task refcount but it's not
> needed for ptrace_may_access. So we could release the rcu lock after
> task refcount is successfully grabbed to reduce the rcu holding time.
>
> Signed-off-by: Miaohe Lin <linmiaohe@xxxxxxxxxx>

Also simple.

Reviewed-by: Muchun Song <songmuchun@xxxxxxxxxxxxx>