From patchwork Wed Aug 24 12:43:52 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joao Martins X-Patchwork-Id: 9297613 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 C843E60757 for ; Wed, 24 Aug 2016 12:44:50 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BA36228FAD for ; Wed, 24 Aug 2016 12:44:50 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id AE8DF28FB1; Wed, 24 Aug 2016 12:44:50 +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, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 322D328FAD for ; Wed, 24 Aug 2016 12:44:48 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bcXWC-0000DL-3B; Wed, 24 Aug 2016 12:42:56 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bcXWB-0000Cg-Cl for xen-devel@lists.xenproject.org; Wed, 24 Aug 2016 12:42:55 +0000 Received: from [85.158.139.211] by server-1.bemta-5.messagelabs.com id AF/5E-19721-E469DB75; Wed, 24 Aug 2016 12:42:54 +0000 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFvrNLMWRWlGSWpSXmKPExsXSO6nOVddv2t5 wg3vnBS2+b5nM5MDocfjDFZYAxijWzLyk/IoE1oyD+5YwFrRwVuy9fpexgfEKexcjF4eQQAeT xMk3XUwQzjdGiab5u1ggnI2MEu+/T2CGcBoZJXZ/WQHkcHKwCehJtJ7/DGaLCChJ3Fs1mQnEZ hbwk1jRvJEVxBYWMJe42vkHLM4ioCrx6XATYxcjBwevgKfEvp2CIGEJATmJ88d/go3hFPCSuH XkGwuILQRUsmzNBlaIGmOJvll9LBMY+RYwMqxiVC9OLSpLLdK11EsqykzPKMlNzMzRNTQw1ct NLS5OTE/NSUwq1kvOz93ECAwUBiDYwbi21fkQoyQHk5Iob3jT3nAhvqT8lMqMxOKM+KLSnNTi Q4wyHBxKErymU4FygkWp6akVaZk5wJCFSUtw8CiJ8LqApHmLCxJzizPTIVKnGBWlxHnfTAFKC IAkMkrz4NpgcXKJUVZKmJcR6BAhnoLUotzMElT5V4ziHIxKwrz/QabwZOaVwE1/BbSYCWhxy/ 3dIItLEhFSUg2M7t8OCPX+i7FmWnjQZKG8WJbXi74FbzSOf7DabDQ59nQsz5673ZuyfU/K7bI sWB0sNX9q28MYhRdnv+s97qhoEJL8/3rSQe27ZZzlMqe3uKe57DgUznLKmOnGA0XW3X9ZW1ZG BjeKMUyOnjFrQl3+jxt1Ea29J0Q9zUykPs6oi39+69U29WhdJZbijERDLeai4kQAZgVb3I4CA AA= X-Env-Sender: joao.m.martins@oracle.com X-Msg-Ref: server-15.tower-206.messagelabs.com!1472042572!42272644!1 X-Originating-IP: [141.146.126.69] X-SpamReason: No, hits=0.0 required=7.0 tests=sa_preprocessor: VHJ1c3RlZCBJUDogMTQxLjE0Ni4xMjYuNjkgPT4gMjc3MjE4\n X-StarScan-Received: X-StarScan-Version: 8.84; banners=-,-,- X-VirusChecked: Checked Received: (qmail 17858 invoked from network); 24 Aug 2016 12:42:53 -0000 Received: from aserp1040.oracle.com (HELO aserp1040.oracle.com) (141.146.126.69) by server-15.tower-206.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 24 Aug 2016 12:42:53 -0000 Received: from aserv0021.oracle.com (aserv0021.oracle.com [141.146.126.233]) by aserp1040.oracle.com (Sentrion-MTA-4.3.2/Sentrion-MTA-4.3.2) with ESMTP id u7OCgntZ023237 (version=TLSv1 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Wed, 24 Aug 2016 12:42:49 GMT Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by aserv0021.oracle.com (8.13.8/8.13.8) with ESMTP id u7OCgnnU008903 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Wed, 24 Aug 2016 12:42:49 GMT Received: from abhmp0016.oracle.com (abhmp0016.oracle.com [141.146.116.22]) by aserv0121.oracle.com (8.13.8/8.13.8) with ESMTP id u7OCgmhe016537; Wed, 24 Aug 2016 12:42:48 GMT Received: from paddy.lan (/89.114.92.174) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Wed, 24 Aug 2016 05:42:48 -0700 From: Joao Martins To: xen-devel@lists.xenproject.org Date: Wed, 24 Aug 2016 13:43:52 +0100 Message-Id: <1472042632-12883-7-git-send-email-joao.m.martins@oracle.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1472042632-12883-1-git-send-email-joao.m.martins@oracle.com> References: <1472042632-12883-1-git-send-email-joao.m.martins@oracle.com> X-Source-IP: aserv0021.oracle.com [141.146.126.233] Cc: Andrew Cooper , Jan Beulich Subject: [Xen-devel] [PATCH v3 6/6] docs: update clocksource option X-BeenThere: xen-devel@lists.xen.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" X-Virus-Scanned: ClamAV using ClamSMTP Add TSC as another clocksource that can be used, plus a mention to the maxcpus parameter and that it requires being explicitly set. Signed-off-by: Joao Martins --- Cc: Andrew Cooper Cc: Jan Beulich New in v3. --- docs/misc/xen-command-line.markdown | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/docs/misc/xen-command-line.markdown b/docs/misc/xen-command-line.markdown index 3a250cb..210927f 100644 --- a/docs/misc/xen-command-line.markdown +++ b/docs/misc/xen-command-line.markdown @@ -264,9 +264,13 @@ minimum of 32M, subject to a suitably aligned and sized contiguous region of memory being available. ### clocksource -> `= pit | hpet | acpi` +> `= pit | hpet | acpi | tsc` If set, override Xen's default choice for the platform timer. +Having TSC as platform timer requires being explicitly set. +This is because TSC can only be safely used if CPU hotplug isn't performed on +the system. In some platforms, "maxcpus" parameter may require further +adjustment to the number of online cpus. ### cmci-threshold > `= `