Return-Path: Received: from qmta04.westchester.pa.mail.comcast.net ([76.96.62.40]:35402 "EHLO QMTA04.westchester.pa.mail.comcast.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755238AbZFEN6T (ORCPT ); Fri, 5 Jun 2009 09:58:19 -0400 Message-ID: <4A292479.4060008@gmail.com> Date: Fri, 05 Jun 2009 09:58:17 -0400 From: Tom Talpey To: Trond Myklebust CC: Steve Dickson , Linux NFS Mailing List Subject: Re: Link performance over NFS degraded in RHEL5. -- was : Read/Write NFS I/O performance degraded by FLUSH_STABLE page flushing References: <1243615595.7155.48.camel@heimdal.trondhjem.org> <1243618500.7155.56.camel@heimdal.trondhjem.org> <1243686363.5209.16.camel@heimdal.trondhjem.org> <1243963631.4868.124.camel@heimdal.trondhjem.org> <18982.41770.293636.786518@fisica.ufpr.br> <1244049027.5603.5.camel@heimdal.trondhjem.org> <4A2902E6.2080006@RedHat.com> <4A29144A.6030405@gmail.com> <4A291D83.1000508@RedHat.com> <4A2922A5.5070101@gmail.com> <1244210096.5410.35.camel@heimdal.trondhjem.org> In-Reply-To: <1244210096.5410.35.camel@heimdal.trondhjem.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Sender: linux-nfs-owner@vger.kernel.org List-ID: MIME-Version: 1.0 On 6/5/2009 9:54 AM, Trond Myklebust wrote: > On Fri, 2009-06-05 at 09:50 -0400, Tom Talpey wrote: >> I'm not 100% clear on what you mean by removing it. Since it's >> a "no_" option, removing it means that "wdelay" becomes the >> default? That would certainly cause a regression for many. > > You've misunderstood. The current default is to _set_ 'wdelay' on all > exports that do not explicitly turn it off. Ok, then turning it off will help some and hurt some. There's no right setting for all. I do agree that fixing the server is the best solution, not grabbing wildly at its crockful controls. Tom.