From mboxrd@z Thu Jan 1 00:00:00 1970 From: Johann Baudy Subject: Re: [PATCH] TX_RING and packet mmap Date: Wed, 8 Apr 2009 23:06:58 +0200 Message-ID: <7e0dd21a0904081406w31da460pe1c0c7153538f283@mail.gmail.com> References: <1238701718.5669.26.camel@bender> <20090407072647.GA11480@gondor.apana.org.au> <1239108520.32737.28.camel@dogo.mojatatu.com> <20090407130447.GA14329@gondor.apana.org.au> <1239112067.32737.51.camel@dogo.mojatatu.com> <7e0dd21a0904070738jd8a2714wd840352699f1e9f1@mail.gmail.com> <1239137800.21227.10.camel@dogo.mojatatu.com> <20090407211130.GA5918@ioremap.net> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: Herbert Xu , netdev@vger.kernel.org, "David S. Miller" , Patrick McHardy To: Evgeniy Polyakov , jamal Return-path: Received: from mail-fx0-f158.google.com ([209.85.220.158]:60036 "EHLO mail-fx0-f158.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756242AbZDHVHA (ORCPT ); Wed, 8 Apr 2009 17:07:00 -0400 Received: by fxm2 with SMTP id 2so319168fxm.37 for ; Wed, 08 Apr 2009 14:06:58 -0700 (PDT) In-Reply-To: <20090407211130.GA5918@ioremap.net> Sender: netdev-owner@vger.kernel.org List-ID: When you said "skb address", did you mean skb pointer value or fragments data address? If fragment data address, I can use first fragment page address to deduce header address (in destructor) As there is a constant offset between header address and data address. However I'm afraid of issues once it is linearized. Is there a sending path that will lose fragments info? Best regards, Johann