From owner-freebsd-emulation@freebsd.org Tue Sep 22 15:13:54 2015 Return-Path: Delivered-To: freebsd-emulation@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 24295A065B2 for ; Tue, 22 Sep 2015 15:13:54 +0000 (UTC) (envelope-from la5lbtyi@aon.at) Received: from smtpout.aon.at (smtpout.aon.at [195.3.96.115]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 7002E1B4B for ; Tue, 22 Sep 2015 15:13:52 +0000 (UTC) (envelope-from la5lbtyi@aon.at) Received: (qmail 26596 invoked from network); 22 Sep 2015 15:13:44 -0000 X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on WARSBL606.highway.telekom.at X-Spam-Level: Received: from 88-117-68-209.adsl.highway.telekom.at (HELO gandalf.xyzzy) ([88.117.68.209]) (envelope-sender ) by smarthub81.res.a1.net (qmail-ldap-1.03) with AES256-SHA encrypted SMTP; 22 Sep 2015 15:13:44 -0000 X-A1Mail-Track-Id: 1442934823:26559:smarthub81:88.117.68.209:1 Received: from mizar.xyzzy (mizar.xyzzy [192.168.1.19]) by gandalf.xyzzy (8.15.2/8.15.2) with ESMTP id t8MFDgVI002493; Tue, 22 Sep 2015 17:13:43 +0200 (CEST) (envelope-from la5lbtyi@aon.at) Subject: Re: VirtualBox mangles memory To: Mark Felder , freebsd-emulation@freebsd.org References: <55FE9662.7000406@aon.at> <1442866256.1127084.389759513.29E96282@webmail.messagingengine.com> From: Martin Birgmeier X-Enigmail-Draft-Status: N1110 Organization: MBi at home Message-ID: <56017026.6040809@aon.at> Date: Tue, 22 Sep 2015 17:13:42 +0200 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:38.0) Gecko/20100101 Thunderbird/38.2.0 MIME-Version: 1.0 In-Reply-To: <1442866256.1127084.389759513.29E96282@webmail.messagingengine.com> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-emulation@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Development of Emulators of other operating systems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 22 Sep 2015 15:13:54 -0000 This did not happen when the machine was running FreeBSD 9.2 with virtualbox-ose-4.3.20 installed. So I would not qualify this as "known behavior". One server has 16G main memory, a VM gets 3G. The other has 8G main mem and again 3G allocated to the VM. This is definitely a bug in how VirtualBox handles memory on FreeBSD 10. I am pretty sure that something changed in FBSD 10 which was not properly taken care of in VB. -- Martin On 09/21/15 22:10, Mark Felder wrote: > > On Sun, Sep 20, 2015, at 06:20, Martin Birgmeier wrote: >> On machines where VirtualBox is running, I get memory allocation errors. >> >> 'dd' aborts with 'dd: stdout: Cannot allocate memory' >> >> 'zfs send' aborts with 'internal error: Cannot allocate memory' >> >> I have created https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=195970 >> to track this. >> >> Could a knowledgeable person please have a look into this? >> >> FreeBSD 10.2, VirtualBox 4.3.30 >> >> -- Martin >> > I'm not an expert, but I think this is known behavior. Virtualbox > requires a huge contiguous chunk of memory for the VM and that's > probably what you're running into. > > Can you give more information about the specs of the server itself and > the amount of resources allocated to VMs? >