Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932313Ab1EQUyG (ORCPT ); Tue, 17 May 2011 16:54:06 -0400 Received: from e1.ny.us.ibm.com ([32.97.182.141]:56334 "EHLO e1.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756566Ab1EQUyD (ORCPT ); Tue, 17 May 2011 16:54:03 -0400 Subject: Re: [PATCH V5 2/6 net-next] netdevice.h: Add zero-copy flag in netdevice From: Shirley Ma To: "Michael S. Tsirkin" Cc: Ben Hutchings , David Miller , Eric Dumazet , Avi Kivity , Arnd Bergmann , netdev@vger.kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org In-Reply-To: <20110517062111.GD26989@redhat.com> References: <1305574128.3456.23.camel@localhost.localdomain> <1305574518.2885.25.camel@bwh-desktop> <1305574680.3456.33.camel@localhost.localdomain> <1305575253.2885.28.camel@bwh-desktop> <20110516211459.GE18148@redhat.com> <1305588738.3456.65.camel@localhost.localdomain> <20110517062111.GD26989@redhat.com> Content-Type: text/plain; charset="UTF-8" Date: Tue, 17 May 2011 13:53:19 -0700 Message-ID: <1305665599.10756.36.camel@localhost.localdomain> Mime-Version: 1.0 X-Mailer: Evolution 2.28.3 (2.28.3-1.fc12) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 640 Lines: 16 On Tue, 2011-05-17 at 09:21 +0300, Michael S. Tsirkin wrote: > Problem is, in your patch there are a set of restrictions on what the > device can do with the skb that we need to enforce somehow. > Also, how do we know it's a 'real NIC' and not a software device? I checked macvtap newlink, it doesn't seem to block software device. So we need to work on the wider feature bit first. Shirley -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/