Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757165Ab0BKUyI (ORCPT ); Thu, 11 Feb 2010 15:54:08 -0500 Received: from one.firstfloor.org ([213.235.205.2]:36929 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757131Ab0BKUyG (ORCPT ); Thu, 11 Feb 2010 15:54:06 -0500 From: Andi Kleen References: <20100211953.850854588@firstfloor.org> In-Reply-To: <20100211953.850854588@firstfloor.org> To: penberg@cs.helsinki.fi, linux-kernel@vger.kernel.org, linux-mm@kvack.org, haicheng.li@intel.com, rientjes@google.com Subject: [PATCH] [3/4] SLAB: Set up the l3 lists for the memory of freshly added memory v2 Message-Id: <20100211205403.05A8EB1978@basil.firstfloor.org> Date: Thu, 11 Feb 2010 21:54:03 +0100 (CET) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1796 Lines: 61 So kmalloc_node() works even if no CPU is up yet on the new node. v2: Take cache chain mutex Signed-off-by: Andi Kleen --- mm/slab.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) Index: linux-2.6.32-memhotadd/mm/slab.c =================================================================== --- linux-2.6.32-memhotadd.orig/mm/slab.c +++ linux-2.6.32-memhotadd/mm/slab.c @@ -115,6 +115,7 @@ #include #include #include +#include #include #include @@ -1554,6 +1555,23 @@ void __init kmem_cache_init(void) g_cpucache_up = EARLY; } +static int slab_memory_callback(struct notifier_block *self, + unsigned long action, void *arg) +{ + struct memory_notify *mn = (struct memory_notify *)arg; + + /* + * When a node goes online allocate l3s early. This way + * kmalloc_node() works for it. + */ + if (action == MEM_ONLINE && mn->status_change_nid >= 0) { + mutex_lock(&cache_chain_mutex); + slab_node_prepare(mn->status_change_nid); + mutex_unlock(&cache_chain_mutex); + } + return NOTIFY_OK; +} + void __init kmem_cache_init_late(void) { struct kmem_cache *cachep; @@ -1577,6 +1595,8 @@ void __init kmem_cache_init_late(void) */ register_cpu_notifier(&cpucache_notifier); + hotplug_memory_notifier(slab_memory_callback, SLAB_CALLBACK_PRI); + /* * The reap timers are started later, with a module init call: That part * of the kernel is not yet operational. -- 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/