Re: [PATCH v3 3/9] mm, hugetlb: clean-up alloc_huge_page()

Hillf Danton
2013-07-29T09:20:41Z

On Mon, Jul 29, 2013 at 1:28 PM, Joonsoo Kim <iamjoonsoo.kim@lge.com> wrote:
> This patch unifies successful allocation paths to make the code more
> readable. There are no functional changes.
>
> Acked-by: Michal Hocko <mhocko@suse.cz>
> Reviewed-by: Wanpeng Li <liwanp@linux.vnet.ibm.com>
> Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
> Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
>
Acked-by: Hillf Danton <dhillf@gmail.com>

> diff --git a/mm/hugetlb.c b/mm/hugetlb.c
> index 51564a8..31d78c5 100644
> --- a/mm/hugetlb.c
> +++ b/mm/hugetlb.c
> @@ -1149,12 +1149,7 @@ static struct page *alloc_huge_page(struct vm_area_struct *vma,
> }
> spin_lock(&hugetlb_lock);
> page = dequeue_huge_page_vma(h, vma, addr, avoid_reserve);
> - if (page) {
> - /* update page cgroup details */
> - hugetlb_cgroup_commit_charge(idx, pages_per_huge_page(h),
> - h_cg, page);
> - spin_unlock(&hugetlb_lock);
> - } else {
> + if (!page) {
> spin_unlock(&hugetlb_lock);
> page = alloc_buddy_huge_page(h, NUMA_NO_NODE);
> if (!page) {
> @@ -1165,11 +1160,11 @@ static struct page *alloc_huge_page(struct vm_area_struct *vma,
> return ERR_PTR(-ENOSPC);
> }
> spin_lock(&hugetlb_lock);
> - hugetlb_cgroup_commit_charge(idx, pages_per_huge_page(h),
> - h_cg, page);
> list_move(&page->lru, &h->hugepage_activelist);
> - spin_unlock(&hugetlb_lock);
> + /* Fall through */
> }
> + hugetlb_cgroup_commit_charge(idx, pages_per_huge_page(h), h_cg, page);
> + spin_unlock(&hugetlb_lock);
>
> set_page_private(page, (unsigned long)spool);
>
> --
> 1.7.9.5
>