diff mbox series

[2/4] mm/large system hash: avoid vmap for non-NUMA machines when hashdist

Message ID 20190528120453.27374-2-npiggin@gmail.com (mailing list archive)
State New, archived
Headers show
Series [1/4] mm/large system hash: use vmalloc for size > MAX_ORDER when !hashdist | expand

Commit Message

Nicholas Piggin May 28, 2019, 12:04 p.m. UTC 
hashdist currently always uses vmalloc when hashdist is true. When
there is only 1 online node and size <= MAX_ORDER, vmalloc can be
avoided.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
 mm/page_alloc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index dd419a074141..15478dba1144 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -8029,7 +8029,8 @@  void *__init alloc_large_system_hash(const char *tablename,
 			else
 				table = memblock_alloc_raw(size,
 							   SMP_CACHE_BYTES);
-		} else if (get_order(size) >= MAX_ORDER || hashdist) {
+		} else if (get_order(size) >= MAX_ORDER ||
+				(hashdist && num_online_nodes() > 1)) {
 			table = __vmalloc(size, gfp_flags, PAGE_KERNEL);
 		} else {
 			/*