From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:57813) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1W5udq-00006z-IX for qemu-devel@nongnu.org; Wed, 22 Jan 2014 05:02:44 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1W5udk-0006yd-D7 for qemu-devel@nongnu.org; Wed, 22 Jan 2014 05:02:38 -0500 Received: from mx1.redhat.com ([209.132.183.28]:8997) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1W5udk-0006xe-3V for qemu-devel@nongnu.org; Wed, 22 Jan 2014 05:02:32 -0500 Message-ID: <52DF972F.3080705@redhat.com> Date: Wed, 22 Jan 2014 11:02:23 +0100 From: Paolo Bonzini MIME-Version: 1.0 References: <1390291367-21958-1-git-send-email-vrozenfe@redhat.com> <1390291367-21958-4-git-send-email-vrozenfe@redhat.com> <52DE4A41.2040403@redhat.com> <1390338775.22984.24.camel@w7-rhel> In-Reply-To: <1390338775.22984.24.camel@w7-rhel> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH 3/3] add support for hyperv time parameter List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Vadim Rozenfeld Cc: mtosatti@redhat.com, pl@dlhnet.de, qemu-devel@nongnu.org, aliguori@amazon.com Il 21/01/2014 22:12, Vadim Rozenfeld ha scritto: >> > >> > If you are planning some level of backwards compatibility with RHEL6, it >> > may make sense to use separate subsections. > I believe we have to make it backward compatible. In RHEL6 we added > support for relaxed timers only, but upstream doesn't have such bits. > Technically, hypercall page, vapic and iTSC pages will be introduced in > RHEL7 and as you said, they will probably go to a different, new > section, but for upstream the entire section is absolutely new. Ok, then upstream we have choice. Using 2 subsections is not wrong, and it makes sense since it's covered by different kernel capabilities. Paolo