From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 3 Oct 2002 19:35:22 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 3 Oct 2002 19:35:22 -0400 Received: from server.s8.com ([66.77.12.139]:18693 "EHLO server.s8.com") by vger.kernel.org with ESMTP id ; Thu, 3 Oct 2002 19:35:21 -0400 Subject: Re: linux-2.4.20-pre8-ac3: NFS performance regression From: "Bryan O'Sullivan" To: Trond Myklebust Cc: Andreas Pfaller , Alan Cox , lkml In-Reply-To: References: <200210032024.47664.apfaller@yahoo.com.au> <1033683184.28814.35.camel@irongate.swansea.linux.org.uk> Content-Type: text/plain Content-Transfer-Encoding: 7bit X-Mailer: Ximian Evolution 1.0.8 Date: 03 Oct 2002 16:40:40 -0700 Message-Id: <1033688440.7341.20.camel@plokta.s8.com> Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 2002-10-03 at 15:50, Trond Myklebust wrote: > FYI, here is the 'fix' Alan is talking about. It could be worth > trying... Trond - I'd seen a similar problem under 2.4.19 with your NFS-ALL patch applied. The client would lock up for periods of up to several minutes at a time without generating any traffic, then would wake up and retransmit. This would continue for a few seconds (rarely more than 30 seconds of uninterrupted IO) before another huge pause-and-retransmit cycle began. Your patch restores client performance to sane levels. It applies cleanly against 2.4.19 with NFS-ALL. I suggest you republish NFS-ALL with this patch applied, in case other people who are stuck with 2.4.19 run into this problem. Thanks,