From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:42093) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1SXrpl-00009o-Rt for qemu-devel@nongnu.org; Fri, 25 May 2012 06:33:27 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1SXrpk-0003h7-9h for qemu-devel@nongnu.org; Fri, 25 May 2012 06:33:25 -0400 Received: from mx1.redhat.com ([209.132.183.28]:19594) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1SXrpk-0003gs-20 for qemu-devel@nongnu.org; Fri, 25 May 2012 06:33:24 -0400 Received: from int-mx02.intmail.prod.int.phx2.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id q4PAXM7K004098 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Fri, 25 May 2012 06:33:22 -0400 Message-ID: <4FBF5FF0.6010701@redhat.com> Date: Fri, 25 May 2012 12:33:20 +0200 From: Gerd Hoffmann MIME-Version: 1.0 References: <1337939061-13629-1-git-send-email-kraxel@redhat.com> <1337939061-13629-11-git-send-email-kraxel@redhat.com> <4FBF5ABE.5050107@redhat.com> In-Reply-To: <4FBF5ABE.5050107@redhat.com> Content-Type: text/plain; charset=ISO-8859-15 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH 10/10] usb-storage: migration support List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Paolo Bonzini Cc: qemu-devel@nongnu.org Hi, > Can usb-storage have multiple requests in flight (in principle, i.e. > according to the USB protocol)? No. Well, not with the protocol emulated here. There is a new one for usb storage devices, designed with USB 3.0 in mind and using streams (usb 3.0 feature) to handle multiple requests in parallel. But I guess when ever implementing that it would be a new device, not a usb-storage extension. cheers, Gerd