From patchwork Fri May 3 21:32:29 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Verma, Vishal L" X-Patchwork-Id: 10929233 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 78F8C933 for ; Fri, 3 May 2019 21:32:52 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 69E3728724 for ; Fri, 3 May 2019 21:32:52 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 5E90128796; Fri, 3 May 2019 21:32:52 +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=-2.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 Received: from ml01.01.org (ml01.01.org [198.145.21.10]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id F41B728724 for ; Fri, 3 May 2019 21:32:51 +0000 (UTC) Received: from [127.0.0.1] (localhost [IPv6:::1]) by ml01.01.org (Postfix) with ESMTP id 4721E2193DFC2; Fri, 3 May 2019 14:32:45 -0700 (PDT) X-Original-To: linux-nvdimm@lists.01.org Delivered-To: linux-nvdimm@lists.01.org Received-SPF: Pass (sender SPF authorized) identity=mailfrom; client-ip=134.134.136.100; helo=mga07.intel.com; envelope-from=vishal.l.verma@intel.com; receiver=linux-nvdimm@lists.01.org Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id 6749B2124B938 for ; Fri, 3 May 2019 14:32:43 -0700 (PDT) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by orsmga105.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 03 May 2019 14:32:43 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.60,427,1549958400"; d="scan'208";a="145838678" Received: from vverma7-desk1.lm.intel.com ([10.232.112.185]) by fmsmga008.fm.intel.com with ESMTP; 03 May 2019 14:32:42 -0700 From: Vishal Verma To: Subject: [ndctl PATCH 6/8] Documentation/daxctl: add a man page for daxctl-reconfigure-device Date: Fri, 3 May 2019 15:32:29 -0600 Message-Id: <20190503213231.12280-7-vishal.l.verma@intel.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190503213231.12280-1-vishal.l.verma@intel.com> References: <20190503213231.12280-1-vishal.l.verma@intel.com> MIME-Version: 1.0 X-BeenThere: linux-nvdimm@lists.01.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Linux-nvdimm developer list." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Dave Hansen , Pavel Tatashin Errors-To: linux-nvdimm-bounces@lists.01.org Sender: "Linux-nvdimm" X-Virus-Scanned: ClamAV using ClamSMTP Add a man page describing the new daxctl-reconfigure-device command. Cc: Pavel Tatashin Cc: Dave Hansen Cc: Dan Williams Signed-off-by: Vishal Verma --- Documentation/daxctl/Makefile.am | 3 +- .../daxctl/daxctl-reconfigure-device.txt | 74 +++++++++++++++++++ 2 files changed, 76 insertions(+), 1 deletion(-) create mode 100644 Documentation/daxctl/daxctl-reconfigure-device.txt diff --git a/Documentation/daxctl/Makefile.am b/Documentation/daxctl/Makefile.am index 6aba035..715fbad 100644 --- a/Documentation/daxctl/Makefile.am +++ b/Documentation/daxctl/Makefile.am @@ -28,7 +28,8 @@ endif man1_MANS = \ daxctl.1 \ daxctl-list.1 \ - daxctl-migrate-device-model.1 + daxctl-migrate-device-model.1 \ + daxctl-reconfigure-device.1 CLEANFILES = $(man1_MANS) diff --git a/Documentation/daxctl/daxctl-reconfigure-device.txt b/Documentation/daxctl/daxctl-reconfigure-device.txt new file mode 100644 index 0000000..d79547c --- /dev/null +++ b/Documentation/daxctl/daxctl-reconfigure-device.txt @@ -0,0 +1,74 @@ +// SPDX-License-Identifier: GPL-2.0 + +daxctl-reconfigure-device(1) +============================ + +NAME +---- +daxctl-reconfigure-device - Reconfigure a dax device into a different mode + +SYNOPSIS +-------- +[verse] +'daxctl reconfigure-device' [...] [] + +DESCRIPTION +----------- + +Reconfigure the operational mode of a dax device. This can be used to convert +a regular 'devdax' mode device to the 'system-ram' mode which allows for the dax +range to be hot-plugged into the system as regular memory. + +NOTE: This is a destructive, one-way operation. Any data on the dax device +*will* be lost, and once reconfigured, there is no equivalent operation to +go back to the normal 'devdax' mode until a reboot. + +OPTIONS +------- +-r:: +--region=:: + Restrict the reconfigure operation to devices belonging to the + specified region(s). A device-dax region is a contiguous range of + memory that hosts one or more /dev/daxX.Y devices, where X is the + region id and Y is the device instance id. + +-m:: +--mode=:: + Specify the mode to which the dax device(s) should be reconfigured. + - "system-ram": hotplug the device into system memory. This is a + one-way operation. Once a device is configured this way, the + setting persists across reboots, until the command is called again + to explicitly switch to the 'devdax' mode. + + - "devdax": switch to the normal "device dax" mode. This only takes + effect following a system reboot. + +-N:: +--no-online:: + By default, memory sections provided by system-ram devices will be + brought online automatically and immediately. Use this option to + disable the automatic onlining behavior. + +--attempt-offline:: + When converting from "system-ram" mode to "devdax", it is expected + that all the memory sections are first made offline. By default, + daxctl won't touch online memory. However with this option, attempt + to offline the memory on the NUMA node associated with the dax device + before converting it back to "devdax" mode. + +-u:: +--human:: + By default the command will output machine-friendly raw-integer + data. Instead, with this flag, numbers representing storage size + will be formatted as human readable strings with units, other + fields are converted to hexadecimal strings. + +-v:: +--verbose:: + Emit more debug messages for the reconfiguration process + +include::../copyright.txt[] + +SEE ALSO +-------- +linkdaxctl:daxctl-list[1]