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| author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2012-07-31 16:42:36 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-07-31 18:42:41 -0700 |
| commit | 75754681fe79b84dde1048470a44eeb64192fad6 (patch) | |
| tree | 70951e240cf1f5f6e7e9b6cb8c0626f3b5ffcfba /mm | |
| parent | 94ae8ba7176666d1e7d8bbb9f93670a27540b6a8 (diff) | |
| download | linux-stable-75754681fe79b84dde1048470a44eeb64192fad6.tar.gz linux-stable-75754681fe79b84dde1048470a44eeb64192fad6.tar.bz2 linux-stable-75754681fe79b84dde1048470a44eeb64192fad6.zip | |
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 <aneesh.kumar@linux.vnet.ibm.com>
Reviewed-by: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/hugetlb_cgroup.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/mm/hugetlb_cgroup.c b/mm/hugetlb_cgroup.c index 9834a01c79dc..a3f358fb8a0c 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; } |