Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263548AbUDPPZV (ORCPT ); Fri, 16 Apr 2004 11:25:21 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263480AbUDPPZU (ORCPT ); Fri, 16 Apr 2004 11:25:20 -0400 Received: from mail.cyclades.com ([64.186.161.6]:64993 "EHLO intra.cyclades.com") by vger.kernel.org with ESMTP id S263548AbUDPPRF (ORCPT ); Fri, 16 Apr 2004 11:17:05 -0400 Date: Fri, 16 Apr 2004 11:46:01 -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: <20040416144601.GF2253@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> <20040416144433.GE2253@logos.cnet> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20040416144433.GE2253@logos.cnet> 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: 1460 Lines: 32 On Fri, Apr 16, 2004 at 11:44:33AM -0300, Marcelo Tosatti wrote: > 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 ? Or just make a big warning in the Kconfig. Distros will set it to the default... > 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/