[PATCH 2/2] mm: hugetlb_vmemmap: allow alloc_vmemmap_page_list() ignore watermarks

[Yuan Can <yuancan@huawei.com>]

The alloc_vmemmap_page_list() is called when hugetlb get freed, more memory
will be returned to buddy after it succeed, thus work with __GFP_MEMALLOC
to allow it ignore watermarks.

Signed-off-by: Yuan Can <yuancan@huawei.com>
---
 mm/hugetlb_vmemmap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/hugetlb_vmemmap.c b/mm/hugetlb_vmemmap.c
index 0485e471d224..dc0b9247a1f9 100644
--- a/mm/hugetlb_vmemmap.c
+++ b/mm/hugetlb_vmemmap.c
@@ -386,7 +386,7 @@ static int vmemmap_remap_free(unsigned long start, unsigned long end,
 static int alloc_vmemmap_page_list(unsigned long start, unsigned long end,
 				   struct list_head *list)
 {
-	gfp_t gfp_mask = GFP_KERNEL | __GFP_RETRY_MAYFAIL;
+	gfp_t gfp_mask = GFP_KERNEL | __GFP_RETRY_MAYFAIL | __GFP_MEMALLOC;
 	unsigned long nr_pages = (end - start) >> PAGE_SHIFT;
 	int nid = page_to_nid((struct page *)start);
 	struct page *page, *next;
-- 
2.17.1