From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752735Ab2LKCgE (ORCPT ); Mon, 10 Dec 2012 21:36:04 -0500 Received: from cn.fujitsu.com ([222.73.24.84]:2424 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1752525Ab2LKCeh (ORCPT ); Mon, 10 Dec 2012 21:34:37 -0500 X-IronPort-AV: E=Sophos;i="4.84,256,1355068800"; d="scan'208";a="6371868" From: Tang Chen To: jiang.liu@huawei.com, wujianguo@huawei.com, hpa@zytor.com, akpm@linux-foundation.org, wency@cn.fujitsu.com, laijs@cn.fujitsu.com, linfeng@cn.fujitsu.com, yinghai@kernel.org, isimatu.yasuaki@jp.fujitsu.com, rob@landley.net, kosaki.motohiro@jp.fujitsu.com, minchan.kim@gmail.com, mgorman@suse.de, rientjes@google.com, rusty@rustcorp.com.au, lliubbo@gmail.com, jaegeuk.hanse@gmail.com, tony.luck@intel.com, glommer@parallels.com Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-doc@vger.kernel.org Subject: [PATCH v3 5/5] page_alloc: Bootmem limit with movablecore_map Date: Tue, 11 Dec 2012 10:33:27 +0800 Message-Id: <1355193207-21797-6-git-send-email-tangchen@cn.fujitsu.com> X-Mailer: git-send-email 1.7.10.1 In-Reply-To: <1355193207-21797-1-git-send-email-tangchen@cn.fujitsu.com> References: <1355193207-21797-1-git-send-email-tangchen@cn.fujitsu.com> X-MIMETrack: Itemize by SMTP Server on mailserver/fnst(Release 8.5.3|September 15, 2011) at 2012/12/11 10:33:34, Serialize by Router on mailserver/fnst(Release 8.5.3|September 15, 2011) at 2012/12/11 10:33:39, Serialize complete at 2012/12/11 10:33:39 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch make sure bootmem will not allocate memory from areas that may be ZONE_MOVABLE. The map info is from movablecore_map boot option. Signed-off-by: Tang Chen Reviewed-by: Wen Congyang Reviewed-by: Lai Jiangshan Tested-by: Lin Feng --- include/linux/memblock.h | 1 + mm/memblock.c | 18 +++++++++++++++++- 2 files changed, 18 insertions(+), 1 deletions(-) diff --git a/include/linux/memblock.h b/include/linux/memblock.h index d452ee1..6e25597 100644 --- a/include/linux/memblock.h +++ b/include/linux/memblock.h @@ -42,6 +42,7 @@ struct memblock { extern struct memblock memblock; extern int memblock_debug; +extern struct movablecore_map movablecore_map; #define memblock_dbg(fmt, ...) \ if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__) diff --git a/mm/memblock.c b/mm/memblock.c index 6259055..197c3be 100644 --- a/mm/memblock.c +++ b/mm/memblock.c @@ -101,6 +101,7 @@ phys_addr_t __init_memblock memblock_find_in_range_node(phys_addr_t start, { phys_addr_t this_start, this_end, cand; u64 i; + int curr = movablecore_map.nr_map - 1; /* pump up @end */ if (end == MEMBLOCK_ALLOC_ACCESSIBLE) @@ -114,13 +115,28 @@ phys_addr_t __init_memblock memblock_find_in_range_node(phys_addr_t start, this_start = clamp(this_start, start, end); this_end = clamp(this_end, start, end); - if (this_end < size) +restart: + if (this_end <= this_start || this_end < size) continue; + for (; curr >= 0; curr--) { + if ((movablecore_map.map[curr].start_pfn << PAGE_SHIFT) + < this_end) + break; + } + cand = round_down(this_end - size, align); + if (curr >= 0 && + cand < movablecore_map.map[curr].end_pfn << PAGE_SHIFT) { + this_end = movablecore_map.map[curr].start_pfn + << PAGE_SHIFT; + goto restart; + } + if (cand >= this_start) return cand; } + return 0; } -- 1.7.1