From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 4 Jun 2002 08:23:15 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 4 Jun 2002 08:23:14 -0400 Received: from pat.uio.no ([129.240.130.16]:20632 "EHLO pat.uio.no") by vger.kernel.org with ESMTP id ; Tue, 4 Jun 2002 08:23:13 -0400 To: Matthias Welk Cc: linux-kernel@vger.kernel.org Subject: Re: nfs slowdown since 2.5.4 In-Reply-To: <200206041253.44446.welk@fokus.gmd.de> From: Trond Myklebust Date: 04 Jun 2002 14:23:07 +0200 Message-ID: User-Agent: Gnus/5.0808 (Gnus v5.8.8) XEmacs/21.4 (Common Lisp) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org >>>>> " " == Matthias Welk writes: > Hi, since 2.5.4 I noticed a big slowdown in nfs. It seems that > this is related to the changes in the nfs-lookup code, because > now most traffic via nfs is for lookup- and getattr-calls as > you can see in the attached tcpdump log. I'v also attached a > log of nfsstat, which shows this problem too. Tough... Those extra checks are needed in order to ensure data cache correctness on file open(). If you think you don't need them because the files that you are reading are known never to change on the server, you can try mounting with the 'nocto' mount option. Cheers, Trond