From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx166.postini.com [74.125.245.166]) by kanga.kvack.org (Postfix) with SMTP id 0907D8D000C for ; Mon, 14 May 2012 07:58:37 -0400 (EDT) Received: from m2.gw.fujitsu.co.jp (unknown [10.0.50.72]) by fgwmail6.fujitsu.co.jp (Postfix) with ESMTP id 9E3F33EE0B6 for ; Mon, 14 May 2012 20:58:36 +0900 (JST) Received: from smail (m2 [127.0.0.1]) by outgoing.m2.gw.fujitsu.co.jp (Postfix) with ESMTP id 857D445DE50 for ; Mon, 14 May 2012 20:58:36 +0900 (JST) Received: from s2.gw.fujitsu.co.jp (s2.gw.fujitsu.co.jp [10.0.50.92]) by m2.gw.fujitsu.co.jp (Postfix) with ESMTP id 6CE4245DE4D for ; Mon, 14 May 2012 20:58:36 +0900 (JST) Received: from s2.gw.fujitsu.co.jp (localhost.localdomain [127.0.0.1]) by s2.gw.fujitsu.co.jp (Postfix) with ESMTP id 5F3251DB8038 for ; Mon, 14 May 2012 20:58:36 +0900 (JST) Received: from m1000.s.css.fujitsu.com (m1000.s.css.fujitsu.com [10.240.81.136]) by s2.gw.fujitsu.co.jp (Postfix) with ESMTP id 168D91DB803E for ; Mon, 14 May 2012 20:58:36 +0900 (JST) Message-ID: <4FB0F38A.5020909@jp.fujitsu.com> Date: Mon, 14 May 2012 20:59:06 +0900 From: Yasuaki Ishimatsu MIME-Version: 1.0 Subject: [Patch 4/4] memblock: compare current_limit with end variable at memblock_find_in_range_node() References: <4FACA79C.9070103@cn.fujitsu.com> <4FB0F174.1000400@jp.fujitsu.com> In-Reply-To: <4FB0F174.1000400@jp.fujitsu.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Lai Jiangshan Cc: Mel Gorman , Andrew Morton , linux-mm@kvack.org, LKML memblock_find_in_range_node() does not compare memblock.current_limit with end variable. Thus even if memblock.current_limit is smaller than end variable, the function allocates memory address that is bigger than memblock.current_limit. The patch adds the check to "memblock_find_in_range_node()" Signed-off-by: Yasuaki Ishimatsu --- mm/memblock.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) Index: linux-3.4-rc6/mm/memblock.c =================================================================== --- linux-3.4-rc6.orig/mm/memblock.c 2012-05-15 03:51:25.104153055 +0900 +++ linux-3.4-rc6/mm/memblock.c 2012-05-15 04:16:49.468094485 +0900 @@ -97,11 +97,12 @@ phys_addr_t __init_memblock memblock_fin phys_addr_t align, int nid) { phys_addr_t this_start, this_end, cand; + phys_addr_t current_limit = memblock.current_limit; u64 i; /* pump up @end */ - if (end == MEMBLOCK_ALLOC_ACCESSIBLE) - end = memblock.current_limit; + if ((end == MEMBLOCK_ALLOC_ACCESSIBLE) || (end > current_limit)) + end = current_limit; /* avoid allocating the first page */ start = max_t(phys_addr_t, start, PAGE_SIZE); -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org