Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754370AbcC1F3v (ORCPT ); Mon, 28 Mar 2016 01:29:51 -0400 Received: from mail-pa0-f43.google.com ([209.85.220.43]:35505 "EHLO mail-pa0-f43.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754079AbcC1F12 (ORCPT ); Mon, 28 Mar 2016 01:27:28 -0400 From: js1304@gmail.com X-Google-Original-From: iamjoonsoo.kim@lge.com To: Andrew Morton Cc: Christoph Lameter , Pekka Enberg , David Rientjes , Jesper Dangaard Brouer , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Joonsoo Kim Subject: [PATCH 05/11] mm/slab: clean-up kmem_cache_node setup Date: Mon, 28 Mar 2016 14:26:55 +0900 Message-Id: <1459142821-20303-6-git-send-email-iamjoonsoo.kim@lge.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1459142821-20303-1-git-send-email-iamjoonsoo.kim@lge.com> References: <1459142821-20303-1-git-send-email-iamjoonsoo.kim@lge.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5530 Lines: 234 From: Joonsoo Kim There are mostly same code for setting up kmem_cache_node either in cpuup_prepare() or alloc_kmem_cache_node(). Factor out and clean-up them. Signed-off-by: Joonsoo Kim --- mm/slab.c | 167 +++++++++++++++++++++++++------------------------------------- 1 file changed, 67 insertions(+), 100 deletions(-) diff --git a/mm/slab.c b/mm/slab.c index 569d7db..b96f381 100644 --- a/mm/slab.c +++ b/mm/slab.c @@ -898,6 +898,62 @@ static int init_cache_node_node(int node) return 0; } +static int setup_kmem_cache_node(struct kmem_cache *cachep, + int node, gfp_t gfp, bool force_change) +{ + int ret = -ENOMEM; + struct kmem_cache_node *n; + struct array_cache *old_shared = NULL; + struct array_cache *new_shared = NULL; + struct alien_cache **new_alien = NULL; + LIST_HEAD(list); + + if (use_alien_caches) { + new_alien = alloc_alien_cache(node, cachep->limit, gfp); + if (!new_alien) + goto fail; + } + + if (cachep->shared) { + new_shared = alloc_arraycache(node, + cachep->shared * cachep->batchcount, 0xbaadf00d, gfp); + if (!new_shared) + goto fail; + } + + ret = init_cache_node(cachep, node, gfp); + if (ret) + goto fail; + + n = get_node(cachep, node); + spin_lock_irq(&n->list_lock); + if (n->shared) { + free_block(cachep, n->shared->entry, + n->shared->avail, node, &list); + } + + if (!n->shared || force_change) { + old_shared = n->shared; + n->shared = new_shared; + new_shared = NULL; + } + + if (!n->alien) { + n->alien = new_alien; + new_alien = NULL; + } + + spin_unlock_irq(&n->list_lock); + slabs_destroy(cachep, &list); + +fail: + kfree(old_shared); + kfree(new_shared); + free_alien_cache(new_alien); + + return ret; +} + static void cpuup_canceled(long cpu) { struct kmem_cache *cachep; @@ -969,7 +1025,6 @@ free_slab: static int cpuup_prepare(long cpu) { struct kmem_cache *cachep; - struct kmem_cache_node *n = NULL; int node = cpu_to_mem(cpu); int err; @@ -988,44 +1043,9 @@ static int cpuup_prepare(long cpu) * array caches */ list_for_each_entry(cachep, &slab_caches, list) { - struct array_cache *shared = NULL; - struct alien_cache **alien = NULL; - - if (cachep->shared) { - shared = alloc_arraycache(node, - cachep->shared * cachep->batchcount, - 0xbaadf00d, GFP_KERNEL); - if (!shared) - goto bad; - } - if (use_alien_caches) { - alien = alloc_alien_cache(node, cachep->limit, GFP_KERNEL); - if (!alien) { - kfree(shared); - goto bad; - } - } - n = get_node(cachep, node); - BUG_ON(!n); - - spin_lock_irq(&n->list_lock); - if (!n->shared) { - /* - * We are serialised from CPU_DEAD or - * CPU_UP_CANCELLED by the cpucontrol lock - */ - n->shared = shared; - shared = NULL; - } -#ifdef CONFIG_NUMA - if (!n->alien) { - n->alien = alien; - alien = NULL; - } -#endif - spin_unlock_irq(&n->list_lock); - kfree(shared); - free_alien_cache(alien); + err = setup_kmem_cache_node(cachep, node, GFP_KERNEL, false); + if (err) + goto bad; } return 0; @@ -3652,72 +3672,19 @@ EXPORT_SYMBOL(kfree); /* * This initializes kmem_cache_node or resizes various caches for all nodes. */ -static int alloc_kmem_cache_node(struct kmem_cache *cachep, gfp_t gfp) +static int setup_kmem_cache_node_node(struct kmem_cache *cachep, gfp_t gfp) { + int ret; int node; struct kmem_cache_node *n; - struct array_cache *new_shared; - struct alien_cache **new_alien = NULL; for_each_online_node(node) { - - if (use_alien_caches) { - new_alien = alloc_alien_cache(node, cachep->limit, gfp); - if (!new_alien) - goto fail; - } - - new_shared = NULL; - if (cachep->shared) { - new_shared = alloc_arraycache(node, - cachep->shared*cachep->batchcount, - 0xbaadf00d, gfp); - if (!new_shared) { - free_alien_cache(new_alien); - goto fail; - } - } - - n = get_node(cachep, node); - if (n) { - struct array_cache *shared = n->shared; - LIST_HEAD(list); - - spin_lock_irq(&n->list_lock); - - if (shared) - free_block(cachep, shared->entry, - shared->avail, node, &list); - - n->shared = new_shared; - if (!n->alien) { - n->alien = new_alien; - new_alien = NULL; - } - n->free_limit = (1 + nr_cpus_node(node)) * - cachep->batchcount + cachep->num; - spin_unlock_irq(&n->list_lock); - slabs_destroy(cachep, &list); - kfree(shared); - free_alien_cache(new_alien); - continue; - } - n = kmalloc_node(sizeof(struct kmem_cache_node), gfp, node); - if (!n) { - free_alien_cache(new_alien); - kfree(new_shared); + ret = setup_kmem_cache_node(cachep, node, gfp, true); + if (ret) goto fail; - } - kmem_cache_node_init(n); - n->next_reap = jiffies + REAPTIMEOUT_NODE + - ((unsigned long)cachep) % REAPTIMEOUT_NODE; - n->shared = new_shared; - n->alien = new_alien; - n->free_limit = (1 + nr_cpus_node(node)) * - cachep->batchcount + cachep->num; - cachep->node[node] = n; } + return 0; fail: @@ -3759,7 +3726,7 @@ static int __do_tune_cpucache(struct kmem_cache *cachep, int limit, cachep->shared = shared; if (!prev) - goto alloc_node; + goto setup_node; for_each_online_cpu(cpu) { LIST_HEAD(list); @@ -3776,8 +3743,8 @@ static int __do_tune_cpucache(struct kmem_cache *cachep, int limit, } free_percpu(prev); -alloc_node: - return alloc_kmem_cache_node(cachep, gfp); +setup_node: + return setup_kmem_cache_node_node(cachep, gfp); } static int do_tune_cpucache(struct kmem_cache *cachep, int limit, -- 1.9.1