From mboxrd@z Thu Jan 1 00:00:00 1970 From: Evgeniy Polyakov Subject: Re: [PATCH v2] tcp: splice as many packets as possible at once Date: Tue, 20 Jan 2009 13:31:22 +0300 Message-ID: <20090120103122.GC9167@ioremap.net> References: <20090114.012919.117682429.davem@davemloft.net> <20090115230331.GB1123@1wt.eu> <20090115231934.GA8328@gondor.apana.org.au> <20090115.152608.89323697.davem@davemloft.net> <20090120083726.GA13806@ff.dom.local> <20090120093352.GB13806@ff.dom.local> <20090120100043.GA9167@ioremap.net> <20090120102053.GA17004@ff.dom.local> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii 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 To: Jarek Poplawski Return-path: Received: from broadrack.ru ([195.178.208.66]:44430 "EHLO tservice.net.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760291AbZATKbT (ORCPT ); Tue, 20 Jan 2009 05:31:19 -0500 Content-Disposition: inline In-Reply-To: <20090120102053.GA17004@ff.dom.local> Sender: netdev-owner@vger.kernel.org List-ID: On Tue, Jan 20, 2009 at 10:20:53AM +0000, Jarek Poplawski (jarkao2@gmail.com) wrote: > Good question! Alas I can't check this soon, but if it's really like > this, of course this needs some better idea and rework. (BTW, I'd like > to prevent here as much as possible some strange activities like 1 > byte (payload) packets getting full pages without any accounting.) I believe approach to meet all our goals is to have own network memory allocator, so that each skb could have its payload in the fragments, we would not suffer from the heavy fragmentation and power-of-two overhead for the larger MTUs, have a reserve for the OOM condition and generally do not depend on the main system behaviour. I will resurrect to some point my network allocator to check how things go in the modern environment, if no one will beat this idea first :) 1. Network (tree) allocator http://www.ioremap.net/projects/nta -- Evgeniy Polyakov