From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754859AbZBCNG3 (ORCPT ); Tue, 3 Feb 2009 08:06:29 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752899AbZBCNGS (ORCPT ); Tue, 3 Feb 2009 08:06:18 -0500 Received: from tservice.ru ([195.178.208.66]:35941 "EHLO tservice.net.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751523AbZBCNGR (ORCPT ); Tue, 3 Feb 2009 08:06:17 -0500 Date: Tue, 3 Feb 2009 16:06:06 +0300 From: Evgeniy Polyakov To: Jarek Poplawski Cc: David Miller , herbert@gondor.apana.org.au, w@1wt.eu, dada1@cosmosbay.com, ben@zeus.com, mingo@elte.hu, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, jens.axboe@oracle.com Subject: Re: [PATCH v2] tcp: splice as many packets as possible at once Message-ID: <20090203130606.GA25471@ioremap.net> References: <20090202080855.GA4129@ff.dom.local> <20090202.001854.261399333.davem@davemloft.net> <20090202084358.GB4129@ff.dom.local> <20090202.235017.253437221.davem@davemloft.net> <20090203094108.GA4639@ff.dom.local> <20090203111012.GA16878@ioremap.net> <20090203123628.GB4639@ff.dom.local> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20090203123628.GB4639@ff.dom.local> User-Agent: Mutt/1.5.13 (2006-08-11) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Feb 03, 2009 at 12:36:28PM +0000, Jarek Poplawski (jarkao2@gmail.com) wrote: > I understand NTA could be better than slabs in above-mentioned cases, > but I'm not sure you explaind enough your point on solving this > zero-copy problem vs. NTA? NTA steals pages from the SLAB so we can maintain any reference counter logic in them, so linear part of the skb may be not really freed/reused until reference counter hits zero. -- Evgeniy Polyakov