From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:36011) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WxCYA-00009N-LZ for qemu-devel@nongnu.org; Wed, 18 Jun 2014 05:53:08 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1WxCY4-0000n8-G6 for qemu-devel@nongnu.org; Wed, 18 Jun 2014 05:53:02 -0400 Received: from mx1.redhat.com ([209.132.183.28]:2594) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WxCY4-0000mx-7h for qemu-devel@nongnu.org; Wed, 18 Jun 2014 05:52:56 -0400 Message-ID: <1403085162.13406.1.camel@nilsson.home.kraxel.org> From: Gerd Hoffmann Date: Wed, 18 Jun 2014 11:52:42 +0200 In-Reply-To: <53A0800B.2070107@terremark.com> References: <1402077126-17799-1-git-send-email-dslutz@verizon.com> <1402077126-17799-3-git-send-email-dslutz@verizon.com> <20140608154014.GE8464@redhat.com> <5395C2C9.7070200@terremark.com> <20140609143844.GA6797@redhat.com> <53960750.3050300@terremark.com> <1402385801.8739.13.camel@nilsson.home.kraxel.org> <53A0800B.2070107@terremark.com> Content-Type: text/plain; charset="UTF-8" Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH v5 2/3] pc & q35: Add new machine opt max-ram-below-4g List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Don Slutz Cc: xen-devel@lists.xensource.com, Stefano Stabellini , "Michael S. Tsirkin" , qemu-devel@nongnu.org, Anthony Liguori , Igor Mammedov , Andreas =?ISO-8859-1?Q?F=E4rber?= Hi, > > IMO xen should use a versioned machine type to make live migration more > > reliable. IIRC this was discussed anyway for other reasons (see > > xen-platform-pci discussions, picking pc-i440fx-1.6 IIRC). > > That is happening as far as I know and does not directly impact this > patch set. > > > That should > > also make qemu use the memory layout expected by old xen. > > Currently xen just ignores the memory layout that QEMU sets up > and does it's own way. So no, this does not make QEMU use the > memory layout expected by old xen. Why? "-M pc-i440fx-1.6" will make qemu use the same memory layout it used to have before gbalign support was added. And that should match what old xen versions are setting up ... cheers, Gerd From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gerd Hoffmann Subject: Re: [PATCH v5 2/3] pc & q35: Add new machine opt max-ram-below-4g Date: Wed, 18 Jun 2014 11:52:42 +0200 Message-ID: <1403085162.13406.1.camel@nilsson.home.kraxel.org> References: <1402077126-17799-1-git-send-email-dslutz@verizon.com> <1402077126-17799-3-git-send-email-dslutz@verizon.com> <20140608154014.GE8464@redhat.com> <5395C2C9.7070200@terremark.com> <20140609143844.GA6797@redhat.com> <53960750.3050300@terremark.com> <1402385801.8739.13.camel@nilsson.home.kraxel.org> <53A0800B.2070107@terremark.com> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <53A0800B.2070107@terremark.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+gceq-qemu-devel=gmane.org@nongnu.org Sender: qemu-devel-bounces+gceq-qemu-devel=gmane.org@nongnu.org To: Don Slutz Cc: xen-devel@lists.xensource.com, Stefano Stabellini , "Michael S. Tsirkin" , qemu-devel@nongnu.org, Anthony Liguori , Igor Mammedov , Andreas =?ISO-8859-1?Q?F=E4rber?= List-Id: xen-devel@lists.xenproject.org Hi, > > IMO xen should use a versioned machine type to make live migration more > > reliable. IIRC this was discussed anyway for other reasons (see > > xen-platform-pci discussions, picking pc-i440fx-1.6 IIRC). > > That is happening as far as I know and does not directly impact this > patch set. > > > That should > > also make qemu use the memory layout expected by old xen. > > Currently xen just ignores the memory layout that QEMU sets up > and does it's own way. So no, this does not make QEMU use the > memory layout expected by old xen. Why? "-M pc-i440fx-1.6" will make qemu use the same memory layout it used to have before gbalign support was added. And that should match what old xen versions are setting up ... cheers, Gerd