From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:52163) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UL9q2-000841-OW for qemu-devel@nongnu.org; Thu, 28 Mar 2013 06:13:43 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1UL9q1-0001i9-Ls for qemu-devel@nongnu.org; Thu, 28 Mar 2013 06:13:42 -0400 Received: from mx4-phx2.redhat.com ([209.132.183.25]:35351) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UL9q1-0001i3-D7 for qemu-devel@nongnu.org; Thu, 28 Mar 2013 06:13:41 -0400 Date: Thu, 28 Mar 2013 06:13:31 -0400 (EDT) From: Paolo Bonzini Message-ID: <8300718.16452772.1364465611936.JavaMail.root@redhat.com> In-Reply-To: <20130328090416.GA18482@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH V3 WIP 3/3] disable vhost_verify_ring_mappings check List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: "Michael S. Tsirkin" Cc: Kevin O'Connor , kvm@vger.kernel.org, Stefan Hajnoczi , seabios-devel , qemu-devel@nongnu.org, "Nicholas A. Bellinger" , virtualization@lists.linux-foundation.org, target-devel@vger.kernel.org, Stefan Hajnoczi , Asias He > I think it's the right thing to do, but maybe not the right place > to do this, need to reset after all IO is done, before > ring memory is write protected. Our emails are crossing each other unfortunately, but I want to reinforce this: ring memory is not write protected. Remember that SeaBIOS can even provide virtio-scsi access to DOS, so you must not reset the device. It must remain functional all the time, and the OS's own driver will reset it when it's started. Paolo