From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:45505) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UxHHY-0002pb-Sr for qemu-devel@nongnu.org; Thu, 11 Jul 2013 09:51:44 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1UxHHW-000332-4I for qemu-devel@nongnu.org; Thu, 11 Jul 2013 09:51:40 -0400 Received: from mx1.redhat.com ([209.132.183.28]:39065) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UxHHV-00032p-Sc for qemu-devel@nongnu.org; Thu, 11 Jul 2013 09:51:38 -0400 Message-ID: <51DEB8FA.8080109@redhat.com> Date: Thu, 11 Jul 2013 15:54:02 +0200 From: Laszlo Ersek MIME-Version: 1.0 References: <1373548466-14804-1-git-send-email-mst@redhat.com> <51DEB59E.2010109@redhat.com> <20130711134101.GA15676@redhat.com> In-Reply-To: <20130711134101.GA15676@redhat.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH] virtio-net: add feature bit for any header s/g List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: "Michael S. Tsirkin" Cc: Rusty Russell , qemu-devel@nongnu.org On 07/11/13 15:41, Michael S. Tsirkin wrote: > So we'll add a way for users to shoot themselves in the foot > by setting a flag incorrectly. Point being? Point taken. The flag name being global / universal relates to the concept, not support level. Exposing it in any device enables the user to set the flag, which in turn enables the guest to negotiate it, and to create descriptor chains that qemu doesn't recognize. Thanks Laszlo