[Devel] Re: [PATCH v3 16/28] memcg: kmem controller charge/uncharge infrastructure

[Frederic Weisbecker]

On Fri, May 25, 2012 at 05:03:36PM +0400, Glauber Costa wrote:
> +bool __mem_cgroup_new_kmem_page(struct page *page, gfp_t gfp)
> +{
> +	struct mem_cgroup *memcg;
> +	struct page_cgroup *pc;
> +	bool ret = true;
> +	size_t size;
> +	struct task_struct *p;
> +
> +	if (!current->mm || in_interrupt())
> +		return true;
> +
> +	rcu_read_lock();
> +	p = rcu_dereference(current->mm->owner);
> +	memcg = mem_cgroup_from_task(p);

So this takes the memcg of the group owner rather than the
task? I understand why we want this for user memory, but for
kernel?