Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753692Ab0BOGG7 (ORCPT ); Mon, 15 Feb 2010 01:06:59 -0500 Received: from cantor.suse.de ([195.135.220.2]:44690 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752260Ab0BOGG6 (ORCPT ); Mon, 15 Feb 2010 01:06:58 -0500 Date: Mon, 15 Feb 2010 17:06:55 +1100 From: Nick Piggin To: David Rientjes Cc: Andi Kleen , penberg@cs.helsinki.fi, linux-kernel@vger.kernel.org, linux-mm@kvack.org, haicheng.li@intel.com Subject: Re: [PATCH] [3/4] SLAB: Set up the l3 lists for the memory of freshly added memory v2 Message-ID: <20100215060655.GH5723@laptop> References: <20100211953.850854588@firstfloor.org> <20100211205403.05A8EB1978@basil.firstfloor.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1941 Lines: 58 On Thu, Feb 11, 2010 at 01:45:16PM -0800, David Rientjes wrote: > On Thu, 11 Feb 2010, Andi Kleen wrote: > > > 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); > > + > > Only needed for CONFIG_NUMA, but there's no side-effects for UMA kernels > since status_change_nid will always be -1. Compiler doesn't know that, though. > > Acked-by: David Rientjes -- 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/