Re: [PATCH -V9 11/15] hugetlb/cgroup: Add charge/uncharge routines for hugetlb cgroup

[Aneesh Kumar K.V]

Hi Andrew,

Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> writes:

> On Thu, 14 Jun 2012 16:58:05 +0800
> Li Zefan <lizefan@xxxxxxxxxx> wrote:
>
>> > +int hugetlb_cgroup_charge_cgroup(int idx, unsigned long nr_pages,
>> 
>> > +				 struct hugetlb_cgroup **ptr)
>> > +{
>> > +	int ret = 0;
>> > +	struct res_counter *fail_res;
>> > +	struct hugetlb_cgroup *h_cg = NULL;
>> > +	unsigned long csize = nr_pages * PAGE_SIZE;
>> > +
>> > +	if (hugetlb_cgroup_disabled())
>> > +		goto done;
>> > +	/*
>> > +	 * We don't charge any cgroup if the compound page have less
>> > +	 * than 3 pages.
>> > +	 */
>> > +	if (huge_page_order(&hstates[idx]) < HUGETLB_CGROUP_MIN_ORDER)
>> > +		goto done;
>> > +again:
>> > +	rcu_read_lock();
>> > +	h_cg = hugetlb_cgroup_from_task(current);
>> > +	if (!h_cg)
>> 
>> 
>> In no circumstances should h_cg be NULL.
>> 
>
> Aneesh?

I missed this in the last review. Thanks for reminding. I will send a
patch addressing this and another related comment in
4FD9A6B6.50503@xxxxxxxxxx as a separate mail.

-aneesh

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