From owner-freebsd-questions@FreeBSD.ORG Fri Apr 4 13:18:05 2014 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 345FE903 for ; Fri, 4 Apr 2014 13:18:05 +0000 (UTC) Received: from host202-129-static.10-188-b.business.telecomitalia.it (host202-129-static.10-188-b.business.telecomitalia.it [188.10.129.202]) by mx1.freebsd.org (Postfix) with ESMTP id DB25CCDC for ; Fri, 4 Apr 2014 13:18:04 +0000 (UTC) Received: from [192.168.0.99] (MAURIZIO-PC [192.168.0.99]) by host202-129-static.10-188-b.business.telecomitalia.it (Postfix) with ESMTP id 3C0D1AE04; Fri, 4 Apr 2014 15:11:10 +0200 (CEST) Message-ID: <533EAF4F.1070206@cloverinformatica.it> Date: Fri, 04 Apr 2014 15:10:39 +0200 From: Maurizio Vairani User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:7.0.1) Gecko/20110929 Thunderbird/7.0.1 MIME-Version: 1.0 To: "R. Scott Evans" Subject: Re: Freebsd as a virtualbox HOST References: <533D22B6.6050107@cloverinformatica.it> <533EA8BC.40202@rsle.net> In-Reply-To: <533EA8BC.40202@rsle.net> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: freebsd-questions@freebsd.org, krad X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 04 Apr 2014 13:18:05 -0000 On 04/04/2014 14:42, R. Scott Evans wrote: > On 04/03/14 04:58, Maurizio Vairani wrote: >> I am running FreeBSD 9.2-STABLE as a VirtualBox host with three Windows >> 7 VM from February 2013. >> The FreeBSD server has an Intel i7 with 64 GB RAM. The server and the >> VMs are very, very stable. >> I am writing this mail in a Windows 7 VM via Mac OS X Remote Desktop and >> seems to work on real PC. >> The only real, unique issue is the VM clock drift: it is slow, very >> slow and I need to synchronize it every 5 minutes. >> In the log I can read from +105ms to +50,43s as adjustment. >> >> Regards >> Maurizio > > > I had the exact same problem with clock drift pop up on one of my > previously non-problematic FreeBSD VM's running on a FreeBSD host > about a month or two ago when all the NTP attacks started. I locked > down NTP at that time on the guest and host systems but also made a > bunch of other changes trying to fix it so I'm not sure which was the > final solution but if it wasn't the NTP issue my next guess was that > it might have been a case of me updating the VirtualBox port (and > others) on the host and then not reloading the virtualbox kernel > module or rebooting the host after the port update. Regardless, it's > not an issue for me any longer (ie, any drift I am seeing is minimal > and ntpd is able to keep up on it's own). > > -scott Hi Scot, thank you for sharing your experience. I update the server nearly every day and when I update VirtualBox I shut down the VMs and reboot the server. But what version of FreeBSD and VirtualBox are you running ? Are you using Windows VMs ? Thanks Maurizio