From 6d76dcf40405144a448040a350fd214ddc243d5e Mon Sep 17 00:00:00 2001 From: Aneesh Kumar K.V Date: Tue, 31 Jul 2012 16:42:18 -0700 Subject: hugetlb/cgroup: add charge/uncharge routines for hugetlb cgroup Add the charge and uncharge routines for hugetlb cgroup. We do cgroup charging in page alloc and uncharge in compound page destructor. Assigning page's hugetlb cgroup is protected by hugetlb_lock. [liwp@linux.vnet.ibm.com: add huge_page_order check to avoid incorrect uncharge] Signed-off-by: Aneesh Kumar K.V Cc: David Rientjes Acked-by: KAMEZAWA Hiroyuki Cc: Hillf Danton Cc: Michal Hocko Cc: KOSAKI Motohiro Signed-off-by: Aneesh Kumar K.V Signed-off-by: Wanpeng Li Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/hugetlb.c | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) (limited to 'mm/hugetlb.c') diff --git a/mm/hugetlb.c b/mm/hugetlb.c index efe29b53daff..16a0f32c4820 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -627,6 +627,8 @@ static void free_huge_page(struct page *page) BUG_ON(page_mapcount(page)); spin_lock(&hugetlb_lock); + hugetlb_cgroup_uncharge_page(hstate_index(h), + pages_per_huge_page(h), page); if (h->surplus_huge_pages_node[nid] && huge_page_order(h) < MAX_ORDER) { /* remove the page from active list */ list_del(&page->lru); @@ -1115,7 +1117,10 @@ static struct page *alloc_huge_page(struct vm_area_struct *vma, struct hstate *h = hstate_vma(vma); struct page *page; long chg; + int ret, idx; + struct hugetlb_cgroup *h_cg; + idx = hstate_index(h); /* * Processes that did not create the mapping will have no * reserves and will not have accounted against subpool @@ -1131,6 +1136,11 @@ static struct page *alloc_huge_page(struct vm_area_struct *vma, if (hugepage_subpool_get_pages(spool, chg)) return ERR_PTR(-ENOSPC); + ret = hugetlb_cgroup_charge_cgroup(idx, pages_per_huge_page(h), &h_cg); + if (ret) { + hugepage_subpool_put_pages(spool, chg); + return ERR_PTR(-ENOSPC); + } spin_lock(&hugetlb_lock); page = dequeue_huge_page_vma(h, vma, addr, avoid_reserve); spin_unlock(&hugetlb_lock); @@ -1138,6 +1148,9 @@ static struct page *alloc_huge_page(struct vm_area_struct *vma, if (!page) { page = alloc_buddy_huge_page(h, NUMA_NO_NODE); if (!page) { + hugetlb_cgroup_uncharge_cgroup(idx, + pages_per_huge_page(h), + h_cg); hugepage_subpool_put_pages(spool, chg); return ERR_PTR(-ENOSPC); } @@ -1146,7 +1159,8 @@ 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 v1.2.3-55-g7522