From 1dd61aa31cb5a64fe294c32424d9602fdb7317b0 Mon Sep 17 00:00:00 2001 From: Heesub Shin Date: Fri, 12 Dec 2014 16:57:21 -0800 Subject: [PATCH] mm/zbud: init user ops only when it is needed When zbud is initialized through the zpool wrapper, pool->ops which points to user-defined operations is always set regardless of whether it is specified from the upper layer. This causes zbud_reclaim_page() to iterate its loop for evicting pool pages out without any gain. This patch sets the user-defined ops only when it is needed, so that zbud_reclaim_page() can bail out the reclamation loop earlier if there is no user-defined operations specified. Signed-off-by: Heesub Shin Acked-by: Dan Streetman Cc: Seth Jennings Cc: Sunae Seo Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/zbud.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/zbud.c b/mm/zbud.c index ec71b37fb06c..4e387bea702e 100644 --- a/mm/zbud.c +++ b/mm/zbud.c @@ -132,7 +132,7 @@ static struct zbud_ops zbud_zpool_ops = { static void *zbud_zpool_create(gfp_t gfp, struct zpool_ops *zpool_ops) { - return zbud_create_pool(gfp, &zbud_zpool_ops); + return zbud_create_pool(gfp, zpool_ops ? &zbud_zpool_ops : NULL); } static void zbud_zpool_destroy(void *pool)