From 94ae8ba7176666d1e7d8bbb9f93670a27540b6a8 Mon Sep 17 00:00:00 2001 From: "Aneesh Kumar K.V" Date: Tue, 31 Jul 2012 16:42:35 -0700 Subject: hugetlb/cgroup: assign the page hugetlb cgroup when we move the page to active list. A page's hugetlb cgroup assignment and movement to the active list should occur with hugetlb_lock held. Otherwise when we remove the hugetlb cgroup we will iterate the active list and find pages with NULL hugetlb cgroup values. Signed-off-by: Aneesh Kumar K.V Reviewed-by: Michal Hocko Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/hugetlb.c | 22 ++++++++++------------ 1 file changed, 10 insertions(+), 12 deletions(-) (limited to 'mm/hugetlb.c') diff --git a/mm/hugetlb.c b/mm/hugetlb.c index ec7b86ebf9d9..c39e4beeb63a 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -928,14 +928,8 @@ struct page *alloc_huge_page_node(struct hstate *h, int nid) page = dequeue_huge_page_node(h, nid); spin_unlock(&hugetlb_lock); - if (!page) { + if (!page) page = alloc_buddy_huge_page(h, nid); - if (page) { - spin_lock(&hugetlb_lock); - list_move(&page->lru, &h->hugepage_activelist); - spin_unlock(&hugetlb_lock); - } - } return page; } @@ -1150,9 +1144,13 @@ 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); - spin_unlock(&hugetlb_lock); - - if (!page) { + if (page) { + /* update page cgroup details */ + hugetlb_cgroup_commit_charge(idx, pages_per_huge_page(h), + h_cg, page); + spin_unlock(&hugetlb_lock); + } else { + spin_unlock(&hugetlb_lock); page = alloc_buddy_huge_page(h, NUMA_NO_NODE); if (!page) { hugetlb_cgroup_uncharge_cgroup(idx, @@ -1162,6 +1160,8 @@ 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); } @@ -1169,8 +1169,6 @@ static struct page *alloc_huge_page(struct vm_area_struct *vma, set_page_private(page, (unsigned long)spool); vma_commit_reservation(h, vma, addr); - /* update page cgroup details */ - hugetlb_cgroup_commit_charge(idx, pages_per_huge_page(h), h_cg, page); return page; } -- cgit v1.2.1