Don't use the reserve pool when soft offlining a hugepage.
Check we have free pages outside the reserve pool before we
dequeue the huge page. Otherwise, we can steal other's reserve page.
Reviewed-by: Aneesh Kumar <aneesh.ku...@linux.vnet.ibm.com>
Signed-off-by: Joonsoo Kim <iamjoonsoo....@lge.com>
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 6782b41..d971233 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -935,10 +935,11 @@ static struct page *alloc_buddy_huge_page(struct hstate
*h, int nid)
*/
struct page *alloc_huge_page_node(struct hstate *h, int nid)
{
- struct page *page;
+ struct page *page = NULL;
spin_lock(&hugetlb_lock);
- page = dequeue_huge_page_node(h, nid);
+ if (h->free_huge_pages - h->resv_huge_pages > 0)
+ page = dequeue_huge_page_node(h, nid);
spin_unlock(&hugetlb_lock);
if (!page)
--
1.7.9.5
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
