From patchwork Thu Sep 1 06:55:06 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Leizhen (ThunderTown)" X-Patchwork-Id: 9308433 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 24326607D2 for ; Thu, 1 Sep 2016 07:05:17 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0F57F291E5 for ; Thu, 1 Sep 2016 07:05:17 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 02858291F4; Thu, 1 Sep 2016 07:05:17 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id A4893291E5 for ; Thu, 1 Sep 2016 07:05:16 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1bfM2E-0005aT-5B; Thu, 01 Sep 2016 07:03:38 +0000 Received: from merlin.infradead.org ([2001:4978:20e::2]) by bombadil.infradead.org with esmtps (Exim 4.85_2 #1 (Red Hat Linux)) id 1bfLwy-0007z3-IJ for linux-arm-kernel@bombadil.infradead.org; Thu, 01 Sep 2016 06:58:12 +0000 Received: from szxga03-in.huawei.com ([119.145.14.66]) by merlin.infradead.org with esmtps (Exim 4.85_2 #1 (Red Hat Linux)) id 1bfLwv-0002no-Tr for linux-arm-kernel@lists.infradead.org; Thu, 01 Sep 2016 06:58:11 +0000 Received: from 172.24.1.60 (EHLO szxeml431-hub.china.huawei.com) ([172.24.1.60]) by szxrg03-dlp.huawei.com (MOS 4.4.3-GA FastPath queued) with ESMTP id CHE42847; Thu, 01 Sep 2016 14:56:51 +0800 (CST) Received: from localhost (10.177.23.164) by szxeml431-hub.china.huawei.com (10.82.67.208) with Microsoft SMTP Server id 14.3.235.1; Thu, 1 Sep 2016 14:56:18 +0800 From: Zhen Lei To: Catalin Marinas , Will Deacon , linux-arm-kernel , linux-kernel , Rob Herring , "Frank Rowand" , devicetree , Andrew Morton , linux-mm Subject: [PATCH v8 15/16] Documentation: remove the constraint on the distances of node pairs Date: Thu, 1 Sep 2016 14:55:06 +0800 Message-ID: <1472712907-12700-16-git-send-email-thunder.leizhen@huawei.com> X-Mailer: git-send-email 1.9.5.msysgit.1 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 X-Originating-IP: [10.177.23.164] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A020202.57C7D134.004E, ss=1, re=0.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0, ip=0.0.0.0, so=2013-05-26 15:14:31, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: 91a67d36a51afad8c876f5568de2d045 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160901_025810_507162_BA5127B4 X-CRM114-Status: UNSURE ( 7.74 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Xinwei Hu , Zhen Lei , Zefan Li , Hanjun Guo , Tianhong Ding Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP 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. Signed-off-by: Zhen Lei --- Documentation/devicetree/bindings/numa.txt | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) -- 2.5.0 diff --git a/Documentation/devicetree/bindings/numa.txt b/Documentation/devicetree/bindings/numa.txt index 21b3505..f7234cd 100644 --- a/Documentation/devicetree/bindings/numa.txt +++ b/Documentation/devicetree/bindings/numa.txt @@ -48,15 +48,19 @@ distance (memory latency) between all numa nodes. Note: 1. Each entry represents distance from first node to second node. - The distances are equal in either direction. 2. The distance from a node to self (local distance) is represented with value 10 and all internode distance should be represented with a value greater than 10. - 3. distance-matrix should have entries in lexicographical ascending + 3. For non-local node pairs: + 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. + 4. distance-matrix should have entries in lexicographical ascending order of nodes. - 4. There must be only one device node distance-map which must + 5. There must be only one device node distance-map which must reside in the root node. - 5. If the distance-map node is not present, a default + 6. If the distance-map node is not present, a default distance-matrix is used. Example: