From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754594Ab1BPVAA (ORCPT ); Wed, 16 Feb 2011 16:00:00 -0500 Received: from rcsinet10.oracle.com ([148.87.113.121]:34826 "EHLO rcsinet10.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754470Ab1BPU76 (ORCPT ); Wed, 16 Feb 2011 15:59:58 -0500 Message-ID: <4D5C3A40.1060106@kernel.org> Date: Wed, 16 Feb 2011 12:57:36 -0800 From: Yinghai Lu User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.16) Gecko/20101125 SUSE/3.0.11 Thunderbird/3.0.11 MIME-Version: 1.0 To: Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" CC: Tejun Heo , David Rientjes , "linux-kernel@vger.kernel.org" Subject: [PATCH] x86, numa: seperate alloc_numa_distance from numa_reset_distance. References: <4D5C3A0F.3080107@kernel.org> In-Reply-To: <4D5C3A0F.3080107@kernel.org> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Source-IP: acsmt355.oracle.com [141.146.40.155] X-Auth-Type: Internal IP X-CT-RefId: str=0001.0A0B020B.4D5C3ABB.0017,ss=1,fgs=0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org alloc code is much bigger the setting self. Signed-off-by: Yinghai Lu --- arch/x86/mm/numa_64.c | 77 +++++++++++++++++++++++++++----------------------- 1 file changed, 42 insertions(+), 35 deletions(-) Index: linux-2.6/arch/x86/mm/numa_64.c =================================================================== --- linux-2.6.orig/arch/x86/mm/numa_64.c +++ linux-2.6/arch/x86/mm/numa_64.c @@ -384,6 +384,43 @@ static void __init numa_reset_distance(v numa_distance_cnt = 0; } +static void __init alloc_numa_distance(void) +{ + nodemask_t nodes_parsed; + size_t size; + int i, j, cnt = 0; + u64 phys; + + /* size the new table and allocate it */ + nodes_parsed = numa_nodes_parsed; + numa_nodemask_from_meminfo(&nodes_parsed, &numa_meminfo); + + for_each_node_mask(i, nodes_parsed) + cnt = i; + size = ++cnt * sizeof(numa_distance[0]); + + phys = memblock_find_in_range(0, + (u64)max_pfn_mapped << PAGE_SHIFT, + size, PAGE_SIZE); + if (phys == MEMBLOCK_ERROR) { + pr_warning("NUMA: Warning: can't allocate distance table!\n"); + /* don't retry until explicitly reset */ + numa_distance = (void *)1LU; + return; + } + memblock_x86_reserve_range(phys, phys + size, "NUMA DIST"); + + numa_distance = __va(phys); + numa_distance_cnt = cnt; + + /* fill with the default distances */ + for (i = 0; i < cnt; i++) + for (j = 0; j < cnt; j++) + numa_distance[i * cnt + j] = i == j ? + LOCAL_DISTANCE : REMOTE_DISTANCE; + printk(KERN_DEBUG "NUMA: Initialized distance table, cnt=%d\n", cnt); +} + /* * Set the distance between node @from to @to to @distance. If distance * table doesn't exist, one which is large enough to accomodate all the @@ -391,41 +428,11 @@ static void __init numa_reset_distance(v */ void __init numa_set_distance(int from, int to, int distance) { - if (!numa_distance) { - nodemask_t nodes_parsed; - size_t size; - int i, j, cnt = 0; - u64 phys; - - /* size the new table and allocate it */ - nodes_parsed = numa_nodes_parsed; - numa_nodemask_from_meminfo(&nodes_parsed, &numa_meminfo); - - for_each_node_mask(i, nodes_parsed) - cnt = i; - size = ++cnt * sizeof(numa_distance[0]); - - phys = memblock_find_in_range(0, - (u64)max_pfn_mapped << PAGE_SHIFT, - size, PAGE_SIZE); - if (phys == MEMBLOCK_ERROR) { - pr_warning("NUMA: Warning: can't allocate distance table!\n"); - /* don't retry until explicitly reset */ - numa_distance = (void *)1LU; - return; - } - memblock_x86_reserve_range(phys, phys + size, "NUMA DIST"); - - numa_distance = __va(phys); - numa_distance_cnt = cnt; - - /* fill with the default distances */ - for (i = 0; i < cnt; i++) - for (j = 0; j < cnt; j++) - numa_distance[i * cnt + j] = i == j ? - LOCAL_DISTANCE : REMOTE_DISTANCE; - printk(KERN_DEBUG "NUMA: Initialized distance table, cnt=%d\n", cnt); - } + if (!numa_distance) + alloc_numa_distance(); + + if (!numa_distance_cnt) + return; if (from >= numa_distance_cnt || to >= numa_distance_cnt) { printk_once(KERN_DEBUG "NUMA: Debug: distance out of bound, from=%d to=%d distance=%d\n",