From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx135.postini.com [74.125.245.135]) by kanga.kvack.org (Postfix) with SMTP id 1F0A86B0062 for ; Fri, 15 Jun 2012 06:31:31 -0400 (EDT) Received: from /spool/local by e23smtp09.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Fri, 15 Jun 2012 11:18:49 +1000 Received: from d23av03.au.ibm.com (d23av03.au.ibm.com [9.190.234.97]) by d23relay03.au.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id q5FAVA7N47579180 for ; Fri, 15 Jun 2012 20:31:11 +1000 Received: from d23av03.au.ibm.com (loopback [127.0.0.1]) by d23av03.au.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id q5FAVAWq018459 for ; Fri, 15 Jun 2012 20:31:10 +1000 From: "Aneesh Kumar K.V" Subject: [PATCH -V2 2/2] hugetlb/cgroup: Assign the page hugetlb cgroup when we move the page to active list. Date: Fri, 15 Jun 2012 16:01:03 +0530 Message-Id: <1339756263-20378-2-git-send-email-aneesh.kumar@linux.vnet.ibm.com> In-Reply-To: <1339756263-20378-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com> References: <1339756263-20378-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com> Sender: owner-linux-mm@kvack.org List-ID: To: linux-mm@kvack.org, kamezawa.hiroyu@jp.fujitsu.com, mhocko@suse.cz, akpm@linux-foundation.org Cc: "Aneesh Kumar K.V" From: "Aneesh Kumar K.V" page's hugetlb cgroup assign and moving to active list should happen with hugetlb_lock held. Otherwise when we remove the hugetlb cgroup we would iterate the active list and will find page with NULL hugetlb cgroup values. Signed-off-by: Aneesh Kumar K.V --- mm/hugetlb.c | 14 +++++++++----- mm/hugetlb_cgroup.c | 3 +-- 2 files changed, 10 insertions(+), 7 deletions(-) diff --git a/mm/hugetlb.c b/mm/hugetlb.c index ec7b86e..10160cb 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -1150,9 +1150,13 @@ 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, @@ -1163,14 +1167,14 @@ static struct page *alloc_huge_page(struct vm_area_struct *vma, } spin_lock(&hugetlb_lock); list_move(&page->lru, &h->hugepage_activelist); + hugetlb_cgroup_commit_charge(idx, pages_per_huge_page(h), + h_cg, page); spin_unlock(&hugetlb_lock); } 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; } diff --git a/mm/hugetlb_cgroup.c b/mm/hugetlb_cgroup.c index 8e7ca0a..d4f3f7b 100644 --- a/mm/hugetlb_cgroup.c +++ b/mm/hugetlb_cgroup.c @@ -218,6 +218,7 @@ done: return ret; } +/* Should be called with hugetlb_lock held */ void hugetlb_cgroup_commit_charge(int idx, unsigned long nr_pages, struct hugetlb_cgroup *h_cg, struct page *page) @@ -225,9 +226,7 @@ void hugetlb_cgroup_commit_charge(int idx, unsigned long nr_pages, if (hugetlb_cgroup_disabled() || !h_cg) return; - spin_lock(&hugetlb_lock); set_hugetlb_cgroup(page, h_cg); - spin_unlock(&hugetlb_lock); return; } -- 1.7.10 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org