Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263529AbUDPPZ2 (ORCPT ); Fri, 16 Apr 2004 11:25:28 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263480AbUDPPZ1 (ORCPT ); Fri, 16 Apr 2004 11:25:27 -0400 Received: from mail.cyclades.com ([64.186.161.6]:60641 "EHLO intra.cyclades.com") by vger.kernel.org with ESMTP id S263529AbUDPPQ4 (ORCPT ); Fri, 16 Apr 2004 11:16:56 -0400 Date: Fri, 16 Apr 2004 11:44:33 -0300 From: Marcelo Tosatti To: Trond Myklebust Cc: linux-kernel@vger.kernel.org, Andrew Morton , shannon@widomaker.com, Phil Oester Subject: Re: NFS and kernel 2.6.x Message-ID: <20040416144433.GE2253@logos.cnet> References: <20040416011401.GD18329@widomaker.com> <1082079061.7141.85.camel@lade.trondhjem.org> <20040415185355.1674115b.akpm@osdl.org> <1082084048.7141.142.camel@lade.trondhjem.org> <20040416045924.GA4870@linuxace.com> <1082093346.7141.159.camel@lade.trondhjem.org> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <1082093346.7141.159.camel@lade.trondhjem.org> User-Agent: Mutt/1.5.5.1i X-Cyclades-MailScanner-Information: Please contact the ISP for more information X-Cyclades-MailScanner: Found to be clean Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1269 Lines: 26 On Thu, Apr 15, 2004 at 10:29:06PM -0700, Trond Myklebust wrote: > P? to , 15/04/2004 klokka 21:59, skreiv Phil Oester: > > > If simply upgrading from 2.4.x to 2.6.x is going to make UDP mounts unusable, > > perhaps this should be documented -- or the option should be deprecated. > > Put simply: I am not interested in wasting _my_ time investigating cases > where UDP is performing badly if TCP is working fine. The variable > reliability issues with UDP are precisely why we worked to get the TCP > stuff working efficiently. > > As for blanket statements like the above: I have seen no evidence yet > that they are any more warranted in 2.6.x than they were in 2.4.x. At > least not as long as I continue to see wire speed performance on reads > and writes on UDP on all my own test setups. Maaybe TCP should be the default then ? In case no one finds the reason why NFS over UDP is slower on 2.6.x than 2.4.x. It seems there are quite a few reports confirming the slowdown. Maybe Jamie Lokier is right in theory? - 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/