diff options
Diffstat (limited to 'mm/hugetlb_cgroup.c')
| -rw-r--r-- | mm/hugetlb_cgroup.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/mm/hugetlb_cgroup.c b/mm/hugetlb_cgroup.c index d1ca1196e62f..680e4819e077 100644 --- a/mm/hugetlb_cgroup.c +++ b/mm/hugetlb_cgroup.c @@ -386,6 +386,26 @@ int __init hugetlb_cgroup_file_init(int idx) return 0; } +void hugetlb_cgroup_migrate(struct page *oldhpage, struct page *newhpage) +{ + struct hugetlb_cgroup *h_cg; + + if (hugetlb_cgroup_disabled()) + return; + + VM_BUG_ON(!PageHuge(oldhpage)); + 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); + spin_unlock(&hugetlb_lock); + cgroup_release_and_wakeup_rmdir(&h_cg->css); + return; +} + struct cgroup_subsys hugetlb_subsys = { .name = "hugetlb", .create = hugetlb_cgroup_create, |