On 05/02, Eric W. Biederman wrote:
>
> +static void mem_cgroup_fork(struct task_struct *tsk)
> +{
> + struct cgroup_subsys_state *css;
> +
> + rcu_read_lock();
> + css = task_css(tsk, memory_cgrp_id);
> + if (css && css_tryget(css))
> + task_update_memcg(tsk, mem_cgroup_from_css(css));
> + rcu_read_unlock();
> +}Why do we need it? The child's mm->memcg was already initialized by mm_init_memcg() and we can't race with migrate until cgroup_threadgroup_change_end() ? Oleg.
