alloc_slab_page never calls alloc_pages_node with -1. It means node's validity check is unnecessary. So we can use alloc_pages_exact_node instead of alloc_pages_node. It could avoid comparison and branch as 6484eb3e2a81807722 tried. Cc: Christoph Lameter <cl@xxxxxxxxxxxxxxxxxxxx> Signed-off-by: Minchan Kim <minchan.kim@xxxxxxxxx> --- mm/slub.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/mm/slub.c b/mm/slub.c index b364844..9984165 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -1084,7 +1084,7 @@ static inline struct page *alloc_slab_page(gfp_t flags, int node, if (node == -1) return alloc_pages(flags, order); else - return alloc_pages_node(node, flags, order); + return alloc_pages_exact_node(node, flags, order); } static struct page *allocate_slab(struct kmem_cache *s, gfp_t flags, int node) -- 1.7.0.5 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>