From patchwork Tue Apr 23 16:29:30 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Changbin Du X-Patchwork-Id: 10913527 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id DEB4C1708 for ; Tue, 23 Apr 2019 16:39:32 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D0C1E285C9 for ; Tue, 23 Apr 2019 16:39:32 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C4210287E5; Tue, 23 Apr 2019 16:39:32 +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=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FROM,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 57253286B0 for ; Tue, 23 Apr 2019 16:39:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729354AbfDWQjN (ORCPT ); Tue, 23 Apr 2019 12:39:13 -0400 Received: from mail-pf1-f196.google.com ([209.85.210.196]:45781 "EHLO mail-pf1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729241AbfDWQjM (ORCPT ); Tue, 23 Apr 2019 12:39:12 -0400 Received: by mail-pf1-f196.google.com with SMTP id e24so7747634pfi.12; Tue, 23 Apr 2019 09:39:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=2yFOemuN+eolbcMH+/FkuAihsixlocXPgjBOPtuP6bo=; b=SkJq64AJRj6L/JcconR1RzVxUNwJaE89UyLSCrjykYgm7VHed/1sbOtWWVRdlN8niw +nS3i5yl0ZH25GUu9DKrpYujqNabEnuDfZdg8N5pxdkLXCbB3DShZBR1ytrKAiS+ppzy RoPxBTK6zcETwFyC1cXvKGmL+1VsMJi3qt6ny4MWT7jWMEIGnPNhuKnCSg7b5zfbcw/1 SVz53xsAnmOhCU7hII/u/ATPEQ+7gKaT+0LWaDisMPg6Rl1N8fBFOIapvUfQnVL36Scw b/zH3Kv1YUz/k9t35DB6/mDhqL4nfvVz8XKYIgtm2DY1ACYvbFSZ5kSZYBClu0TjzObG 1YeA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=2yFOemuN+eolbcMH+/FkuAihsixlocXPgjBOPtuP6bo=; b=Zj7mfXZ6PC0WHCx0UYn1IzoezWtyWvTJp2AdVM4CzPkJ5LtmZLbOGH3f3xs2smhfQl W6tdKkT6FSnXmMgFm/TdtjIeSdk/TOQB+dP19npWEuwMPZ7H5+E5NEWyJ6D0JY608h6u o3r1Tv4AqInpu7vVb0nl5uzfXfdVMiMiuPNNaI3SxJZBOQ3zAnYPZCvLIdmdOn2XvySS WkEG1dbZwZV01bZMMp2f1HDrjL4bJbR5vMebLuq7gda4bQv30Ea7jR5jGQkAmVKY031X jVe0ZDgSDedXApJ5Kkb+PO6GOjgYNwhIgpJLXXvaz6fuMs4MYeG18fOtsm2X/QdnVo7s e3Lw== X-Gm-Message-State: APjAAAUgoFBBXlpCTa+EB1Dvx7PipRNmC8cvOcJW65GUL0WVYUmn31Fq noQ2hbNkNO5XaE9egiMD6j4= X-Google-Smtp-Source: APXvYqyt0eJT3NkmhT2J6r3iHijPGVxGT07haTkb6FEPB0c4A+sKOygu+96OyFnqj/Mw0nYRxCYdsw== X-Received: by 2002:a63:4b21:: with SMTP id y33mr26241568pga.37.1556037551867; Tue, 23 Apr 2019 09:39:11 -0700 (PDT) Received: from localhost.localdomain ([104.238.181.70]) by smtp.gmail.com with ESMTPSA id v1sm24364801pff.81.2019.04.23.09.39.07 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 23 Apr 2019 09:39:11 -0700 (PDT) From: Changbin Du To: Jonathan Corbet Cc: Bjorn Helgaas , rjw@rjwysocki.net, linux-pci@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, tglx@linutronix.de, mingo@redhat.com, x86@kernel.org, fenghua.yu@intel.com, linuxppc-dev@lists.ozlabs.org, linux-acpi@vger.kernel.org, linux-gpio@vger.kernel.org, mchehab+samsung@kernel.org, Changbin Du Subject: [PATCH v4 61/63] Documentation: x86: convert x86_64/fake-numa-for-cpusets to reST Date: Wed, 24 Apr 2019 00:29:30 +0800 Message-Id: <20190423162932.21428-62-changbin.du@gmail.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190423162932.21428-1-changbin.du@gmail.com> References: <20190423162932.21428-1-changbin.du@gmail.com> MIME-Version: 1.0 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This converts the plain text documentation to reStructuredText format and add it to Sphinx TOC tree. No essential content change. Signed-off-by: Changbin Du --- ...a-for-cpusets => fake-numa-for-cpusets.rst} | 18 +++++++++++++----- Documentation/x86/x86_64/index.rst | 1 + 2 files changed, 14 insertions(+), 5 deletions(-) rename Documentation/x86/x86_64/{fake-numa-for-cpusets => fake-numa-for-cpusets.rst} (90%) diff --git a/Documentation/x86/x86_64/fake-numa-for-cpusets b/Documentation/x86/x86_64/fake-numa-for-cpusets.rst similarity index 90% rename from Documentation/x86/x86_64/fake-numa-for-cpusets rename to Documentation/x86/x86_64/fake-numa-for-cpusets.rst index 4b09f18831f8..3c23f45d38f6 100644 --- a/Documentation/x86/x86_64/fake-numa-for-cpusets +++ b/Documentation/x86/x86_64/fake-numa-for-cpusets.rst @@ -1,5 +1,12 @@ +.. SPDX-License-Identifier: GPL-2.0 + +===================== +Fake NUMA For CPUSets +===================== + +:Author: David Rientjes + Using numa=fake and CPUSets for Resource Management -Written by David Rientjes This document describes how the numa=fake x86_64 command-line option can be used in conjunction with cpusets for coarse memory management. Using this feature, @@ -20,7 +27,7 @@ you become more familiar with using this combination for resource control, you'll determine a better setup to minimize the number of nodes you have to deal with. -A machine may be split as follows with "numa=fake=4*512," as reported by dmesg: +A machine may be split as follows with "numa=fake=4*512," as reported by dmesg:: Faking node 0 at 0000000000000000-0000000020000000 (512MB) Faking node 1 at 0000000020000000-0000000040000000 (512MB) @@ -34,7 +41,7 @@ A machine may be split as follows with "numa=fake=4*512," as reported by dmesg: Now following the instructions for mounting the cpusets filesystem from Documentation/cgroup-v1/cpusets.txt, you can assign fake nodes (i.e. contiguous memory -address spaces) to individual cpusets: +address spaces) to individual cpusets:: [root@xroads /]# mkdir exampleset [root@xroads /]# mount -t cpuset none exampleset @@ -47,7 +54,7 @@ Now this cpuset, 'ddset', will only allowed access to fake nodes 0 and 1 for memory allocations (1G). You can now assign tasks to these cpusets to limit the memory resources -available to them according to the fake nodes assigned as mems: +available to them according to the fake nodes assigned as mems:: [root@xroads /exampleset/ddset]# echo $$ > tasks [root@xroads /exampleset/ddset]# dd if=/dev/zero of=tmp bs=1024 count=1G @@ -56,7 +63,8 @@ available to them according to the fake nodes assigned as mems: Notice the difference between the system memory usage as reported by /proc/meminfo between the restricted cpuset case above and the unrestricted case (i.e. running the same 'dd' command without assigning it to a fake NUMA -cpuset): +cpuset):: + Unrestricted Restricted MemTotal: 3091900 kB 3091900 kB MemFree: 42113 kB 1513236 kB diff --git a/Documentation/x86/x86_64/index.rst b/Documentation/x86/x86_64/index.rst index 7b8c82151358..e2a324cde671 100644 --- a/Documentation/x86/x86_64/index.rst +++ b/Documentation/x86/x86_64/index.rst @@ -11,3 +11,4 @@ x86_64 Support uefi mm 5level-paging + fake-numa-for-cpusets