From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lf0-f71.google.com (mail-lf0-f71.google.com [209.85.215.71]) by kanga.kvack.org (Postfix) with ESMTP id 1CC7B82F66 for ; Thu, 1 Sep 2016 02:56:50 -0400 (EDT) Received: by mail-lf0-f71.google.com with SMTP id k135so53255735lfb.2 for ; Wed, 31 Aug 2016 23:56:50 -0700 (PDT) Received: from szxga01-in.huawei.com (szxga01-in.huawei.com. [58.251.152.64]) by mx.google.com with ESMTPS id yj8si4235657wjb.27.2016.08.31.23.56.32 for (version=TLS1 cipher=AES128-SHA bits=128/128); Wed, 31 Aug 2016 23:56:34 -0700 (PDT) From: Zhen Lei Subject: [PATCH v8 14/16] of/numa: remove the constraint on the distances of node pairs Date: Thu, 1 Sep 2016 14:55:05 +0800 Message-ID: <1472712907-12700-15-git-send-email-thunder.leizhen@huawei.com> In-Reply-To: <1472712907-12700-1-git-send-email-thunder.leizhen@huawei.com> References: <1472712907-12700-1-git-send-email-thunder.leizhen@huawei.com> MIME-Version: 1.0 Content-Type: text/plain Sender: owner-linux-mm@kvack.org List-ID: To: Catalin Marinas , Will Deacon , linux-arm-kernel , linux-kernel , Rob Herring , Frank Rowand , devicetree , Andrew Morton , linux-mm Cc: Zefan Li , Xinwei Hu , Tianhong Ding , Hanjun Guo , Zhen Lei At present, the distances must equal in both direction for each node pairs. For example: the distance of node B->A must the same to A->B. But we really don't have to do this. End up fill default distances as below: 1. If both direction specified, keep no change. 2. If only one direction specified, assign it to the other direction. 3. If none of the two direction specified, both are assigned to REMOTE_DISTANCE. Signed-off-by: Zhen Lei Acked-by: Rob Herring --- drivers/of/of_numa.c | 22 +++++++++++++++++----- 1 file changed, 17 insertions(+), 5 deletions(-) diff --git a/drivers/of/of_numa.c b/drivers/of/of_numa.c index f63d4b0d..1840045 100644 --- a/drivers/of/of_numa.c +++ b/drivers/of/of_numa.c @@ -127,15 +127,25 @@ static int __init of_numa_parse_distance_map_v1(struct device_node *map) numa_set_distance(nodea, nodeb, distance); pr_debug("distance[node%d -> node%d] = %d\n", nodea, nodeb, distance); - - /* Set default distance of node B->A same as A->B */ - if (nodeb > nodea) - numa_set_distance(nodeb, nodea, distance); } return 0; } +static void __init fill_default_distances(void) +{ + int i, j; + + for (i = 0; i < nr_node_ids; i++) + for (j = 0; j < nr_node_ids; j++) + if (i == j) + numa_set_distance(i, j, LOCAL_DISTANCE); + else if (!node_distance(i, j)) + numa_set_distance(i, j, + node_distance(j, i) ? : REMOTE_DISTANCE); + +} + static int __init of_numa_parse_distance_map(void) { int ret = 0; @@ -145,8 +155,10 @@ static int __init of_numa_parse_distance_map(void) "numa-distance-map-v1"); if (np) ret = of_numa_parse_distance_map_v1(np); - of_node_put(np); + + fill_default_distances(); + return ret; } -- 2.5.0 -- 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/ . Don't email: email@kvack.org