Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1945941Ab2ERNCg (ORCPT ); Fri, 18 May 2012 09:02:36 -0400 Received: from mail-pz0-f46.google.com ([209.85.210.46]:47716 "EHLO mail-pz0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933056Ab2ERNCd (ORCPT ); Fri, 18 May 2012 09:02:33 -0400 From: Joonsoo Kim To: Pekka Enberg Cc: Christoph Lameter , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Joonsoo Kim Subject: [PATCH 1,2/4 v4] slub: use __cmpxchg_double_slab() at interrupt disabled place Date: Fri, 18 May 2012 22:01:17 +0900 Message-Id: <1337346077-2754-1-git-send-email-js1304@gmail.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1858 Lines: 60 get_freelist(), unfreeze_partials() are only called with interrupt disabled, so __cmpxchg_double_slab() is suitable. Acked-by: Christoph Lameter Signed-off-by: Joonsoo Kim --- According to comment from Pekka, add some comment. diff --git a/mm/slub.c b/mm/slub.c index 0c3105c..d7f8291 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -1879,7 +1879,11 @@ redo: } } -/* Unfreeze all the cpu partial slabs */ +/* + * Unfreeze all the cpu partial slabs. + * + * This function must be called with interrupt disabled. + */ static void unfreeze_partials(struct kmem_cache *s) { struct kmem_cache_node *n = NULL; @@ -1935,7 +1939,7 @@ static void unfreeze_partials(struct kmem_cache *s) l = m; } - } while (!cmpxchg_double_slab(s, page, + } while (!__cmpxchg_double_slab(s, page, old.freelist, old.counters, new.freelist, new.counters, "unfreezing slab")); @@ -2163,6 +2167,8 @@ static inline void *new_slab_objects(struct kmem_cache *s, gfp_t flags, * The page is still frozen if the return value is not NULL. * * If this function returns NULL then the page has been unfrozen. + * + * This function must be called with interrupt disabled. */ static inline void *get_freelist(struct kmem_cache *s, struct page *page) { @@ -2179,7 +2185,7 @@ static inline void *get_freelist(struct kmem_cache *s, struct page *page) new.inuse = page->objects; new.frozen = freelist != NULL; - } while (!cmpxchg_double_slab(s, page, + } while (!__cmpxchg_double_slab(s, page, freelist, counters, NULL, new.counters, "get_freelist")); -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/