From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:54362) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1da3xI-00063t-RV for qemu-devel@nongnu.org; Tue, 25 Jul 2017 13:49:13 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1da3xG-0004uR-1H for qemu-devel@nongnu.org; Tue, 25 Jul 2017 13:49:12 -0400 Received: from mx1.redhat.com ([209.132.183.28]:57546) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1da3xF-0004tL-RU for qemu-devel@nongnu.org; Tue, 25 Jul 2017 13:49:09 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id CA92A8B137 for ; Tue, 25 Jul 2017 17:49:08 +0000 (UTC) Date: Tue, 25 Jul 2017 13:49:05 -0400 (EDT) From: Paolo Bonzini Message-ID: <696948082.18968773.1501004945066.JavaMail.zimbra@redhat.com> In-Reply-To: References: <20170725141041.1195-1-berrange@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH] qemu-options: document existance of versioned machine types List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: John Snow Cc: "Daniel P. Berrange" , qemu-devel@nongnu.org > > On 07/25/2017 10:10 AM, Daniel P. Berrange wrote: > > The -machine docs did not explain what the versioned machine > > types are for, nor that they'll be maintained across > > releases. > > > > Signed-off-by: Daniel P. Berrange > > --- > > qemu-options.hx | 15 ++++++++++++++- > > 1 file changed, 14 insertions(+), 1 deletion(-) > > > > diff --git a/qemu-options.hx b/qemu-options.hx > > index 746b5fa75d..9f6e2adfff 100644 > > --- a/qemu-options.hx > > +++ b/qemu-options.hx > > @@ -49,7 +49,20 @@ STEXI > > @item -machine [type=]@var{name}[,prop=@var{value}[,...]] > > @findex -machine > > Select the emulated machine by @var{name}. Use @code{-machine help} to > > list > > -available machines. Supported machine properties are: > > +available machines. > > + > > +For architectures which aim to support live migration compatibility > > +across releases, each release will introduce a new versioned machine > > +type. For example, the 2.8.0 release introduced machine types > > +``pc-i440fx-2.8'' and ``pc-q35-2.8'' for the x86_64/i686 architectures. > > Seems like an improvement to me, but do we have any formal policy on how > long we support said machine types? The new wording prompts that question. Forever, and ever... Paolo