From: Wanpeng Li <l...@linux.vnet.ibm.com>
hugepage_activelist is used to track currently used HugeTLB pages.
We can find the in-use HugeTLB pages to support HugeTLB cgroup
removal. Don't keep unused page in hugetlb_activelist too long.
Otherwise, on cgroup removal we should update the unused page's
charge to parent count. To reduce this overhead, remove unused page
from hugepage_activelist immediately.
Signed-off-by: Wanpeng Li <liwp.li...@gmail.com>
---
mm/hugetlb_cgroup.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/mm/hugetlb_cgroup.c b/mm/hugetlb_cgroup.c
index b834e8d..d819d66 100644
--- a/mm/hugetlb_cgroup.c
+++ b/mm/hugetlb_cgroup.c
@@ -398,6 +398,7 @@ 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);
+ list_del(&oldhpage->lru);
/* move the h_cg details to new cgroup */
set_hugetlb_cgroup(newhpage, h_cg);
--
1.7.5.4
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