From owner-svn-src-all@FreeBSD.ORG Sat Dec 31 13:35:49 2011 Return-Path: Delivered-To: svn-src-all@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 611181065670; Sat, 31 Dec 2011 13:35:49 +0000 (UTC) (envelope-from bz@FreeBSD.org) Received: from mx1.sbone.de (mx1.sbone.de [IPv6:2a01:4f8:130:3ffc::401:25]) by mx1.freebsd.org (Postfix) with ESMTP id 0F17F8FC0A; Sat, 31 Dec 2011 13:35:49 +0000 (UTC) Received: from mail.sbone.de (mail.sbone.de [IPv6:fde9:577b:c1a9:31::2013:587]) (using TLSv1 with cipher ADH-CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by mx1.sbone.de (Postfix) with ESMTPS id 4057E25D385D; Sat, 31 Dec 2011 13:35:48 +0000 (UTC) Received: from content-filter.sbone.de (content-filter.sbone.de [IPv6:fde9:577b:c1a9:31::2013:2742]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.sbone.de (Postfix) with ESMTPS id 6CF93BD82D6; Sat, 31 Dec 2011 13:35:47 +0000 (UTC) X-Virus-Scanned: amavisd-new at sbone.de Received: from mail.sbone.de ([IPv6:fde9:577b:c1a9:31::2013:587]) by content-filter.sbone.de (content-filter.sbone.de [fde9:577b:c1a9:31::2013:2742]) (amavisd-new, port 10024) with ESMTP id wjWnXc0XTbZb; Sat, 31 Dec 2011 13:35:46 +0000 (UTC) Received: from orange-en1.sbone.de (orange-en1.sbone.de [IPv6:fde9:577b:c1a9:31:cabc:c8ff:fecf:e8e3]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) by mail.sbone.de (Postfix) with ESMTPSA id 4FCB5BD82D5; Sat, 31 Dec 2011 13:35:46 +0000 (UTC) Mime-Version: 1.0 (Apple Message framework v1084) Content-Type: text/plain; charset=us-ascii From: "Bjoern A. Zeeb" In-Reply-To: <201112311324.pBVDOriM065030@svn.freebsd.org> Date: Sat, 31 Dec 2011 13:35:45 +0000 Content-Transfer-Encoding: 7bit Message-Id: <74F5764C-9E62-4B17-A142-984A9C8ECEF4@FreeBSD.org> References: <201112311324.pBVDOriM065030@svn.freebsd.org> To: Gavin Atkinson X-Mailer: Apple Mail (2.1084) Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org Subject: Re: svn commit: r229085 - in head/sys: amd64/amd64 i386/i386 X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 31 Dec 2011 13:35:49 -0000 On 31. Dec 2011, at 13:24 , Gavin Atkinson wrote: > Author: gavin > Date: Sat Dec 31 13:24:53 2011 > New Revision: 229085 > URL: http://svn.freebsd.org/changeset/base/229085 > > Log: > Default to not performing the early-boot memory tests when we detect we > are booting inside a VM. There are three reasons to disable this: > > o It causes the VM host to believe that all the tested pages or RAM are > in use. This in turn may force the host to page out pages of RAM > belonging to other VMs, or otherwise cause problems with fair resource > sharing on the VM cluster. > o It adds significant time to the boot process (around 1 second/Gig in > testing) Well for that argument the tunable exists... > o It is unnecessary - the host should have already verified that the > memory is functional etc. > > Note that this simply changes the default when in a VM - it can still be > overridden using the hw.memtest.tests tunable. > Thanks a lot for committing this! May I ask for a slightly earlier MFC than 4 weeks? /bz -- Bjoern A. Zeeb You have to have visions! It does not matter how good you are. It matters what good you do!