From: Aneesh Kumar K.V Date: Tue, 31 Jul 2012 23:42:36 +0000 (-0700) Subject: hugetlb/cgroup: remove exclude and wakeup rmdir calls from migrate X-Git-Tag: v3.6-rc1~24^2~90 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=75754681fe79b84dde1048470a44eeb64192fad6;p=profile%2Fivi%2Fkernel-adaptation-intel-automotive.git hugetlb/cgroup: remove exclude and wakeup rmdir calls from migrate We already hold the hugetlb_lock. That should prevent a parallel cgroup rmdir from touching page's hugetlb cgroup. So remove the exclude and wakeup calls. Signed-off-by: Aneesh Kumar K.V Reviewed-by: Michal Hocko Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/mm/hugetlb_cgroup.c b/mm/hugetlb_cgroup.c index 9834a01..a3f358f 100644 --- a/mm/hugetlb_cgroup.c +++ b/mm/hugetlb_cgroup.c @@ -385,6 +385,10 @@ int __init hugetlb_cgroup_file_init(int idx) return 0; } +/* + * hugetlb_lock will make sure a parallel cgroup rmdir won't happen + * when we migrate hugepages + */ void hugetlb_cgroup_migrate(struct page *oldhpage, struct page *newhpage) { struct hugetlb_cgroup *h_cg; @@ -397,13 +401,11 @@ void hugetlb_cgroup_migrate(struct page *oldhpage, struct page *newhpage) spin_lock(&hugetlb_lock); h_cg = hugetlb_cgroup_from_page(oldhpage); set_hugetlb_cgroup(oldhpage, NULL); - cgroup_exclude_rmdir(&h_cg->css); /* move the h_cg details to new cgroup */ set_hugetlb_cgroup(newhpage, h_cg); list_move(&newhpage->lru, &h->hugepage_activelist); spin_unlock(&hugetlb_lock); - cgroup_release_and_wakeup_rmdir(&h_cg->css); return; }