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From: Tang Chen <tangchen@cn.fujitsu.com>
To: akpm@linux-foundation.org, jiang.liu@huawei.com,
	wujianguo@huawei.com, hpa@zytor.com, 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, guz.fnst@cn.fujitsu.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
Subject: [Bug fix PATCH 1/2] acpi, movablemem_map: Do not zero numa_meminfo in numa_init().
Date: Tue, 19 Feb 2013 21:01:43 +0800	[thread overview]
Message-ID: <1361278904-8690-2-git-send-email-tangchen@cn.fujitsu.com> (raw)
In-Reply-To: <1361278904-8690-1-git-send-email-tangchen@cn.fujitsu.com>

early_parse_srat() is called before numa_init(), and has initialized
numa_meminfo. So do not zero numa_meminfo in numa_init(), otherwise
we will lose memory numa info.

Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com>
---
 arch/x86/mm/numa.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c
index 3545585..ff3633c 100644
--- a/arch/x86/mm/numa.c
+++ b/arch/x86/mm/numa.c
@@ -559,10 +559,12 @@ static int __init numa_init(int (*init_func)(void))
 	for (i = 0; i < MAX_LOCAL_APIC; i++)
 		set_apicid_to_node(i, NUMA_NO_NODE);
 
-	/* Do not clear numa_nodes_parsed because SRAT was parsed earlier. */
+	/*
+	 * Do not clear numa_nodes_parsed or zero numa_meminfo here, because
+	 * SRAT was parsed earlier in early_parse_srat().
+	 */
 	nodes_clear(node_possible_map);
 	nodes_clear(node_online_map);
-	memset(&numa_meminfo, 0, sizeof(numa_meminfo));
 	WARN_ON(memblock_set_node(0, ULLONG_MAX, MAX_NUMNODES));
 	numa_reset_distance();
 
-- 
1.7.1

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  reply	other threads:[~2013-02-19 13:02 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-02-19 13:01 [Bug fix PATCH 0/2] Bug fix for movablemem_map boot option Tang Chen
2013-02-19 13:01 ` Tang Chen [this message]
2013-02-19 13:16   ` [Bug fix PATCH 1/2] acpi, movablemem_map: Do not zero numa_meminfo in numa_init() Tang Chen
2013-02-19 13:01 ` [Bug fix PATCH 2/2] acpi, movablemem_map: Set numa_nodes_hotplug nodemask when using SRAT info Tang Chen

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