From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DD0A4C433E0 for ; Sun, 21 Feb 2021 15:54:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B25BD64DA8 for ; Sun, 21 Feb 2021 15:54:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230128AbhBUPyq (ORCPT ); Sun, 21 Feb 2021 10:54:46 -0500 Received: from ivanoab7.miniserver.com ([37.128.132.42]:46698 "EHLO www.kot-begemot.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229985AbhBUPyl (ORCPT ); Sun, 21 Feb 2021 10:54:41 -0500 Received: from tun252.jain.kot-begemot.co.uk ([192.168.18.6] helo=jain.kot-begemot.co.uk) by www.kot-begemot.co.uk with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1lDr3S-0004jh-BF; Sun, 21 Feb 2021 15:53:54 +0000 Received: from madding.kot-begemot.co.uk ([192.168.3.98]) by jain.kot-begemot.co.uk with esmtps (TLS1.3:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.92) (envelope-from ) id 1lDr3Q-00084t-4Z; Sun, 21 Feb 2021 15:53:54 +0000 Subject: Re: NFS Caching broken in 4.19.37 To: Bruce Fields Cc: Salvatore Bonaccorso , Chuck Lever , Linux Kernel Mailing List , "940821@bugs.debian.org" <940821@bugs.debian.org>, Linux NFS Mailing List , trond.myklebust@hammerspace.com, anna.schumaker@netapp.com References: <5022bdc4-9f3e-9756-cbca-ada37f88ecc7@cambridgegreys.com> <9305dc03-5557-5e18-e5c9-aaf886a03fff@cambridgegreys.com> <20210221143712.GA15975@fieldses.org> From: Anton Ivanov Organization: Cambridge Greys Message-ID: Date: Sun, 21 Feb 2021 15:53:51 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.7.0 MIME-Version: 1.0 In-Reply-To: <20210221143712.GA15975@fieldses.org> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US X-Clacks-Overhead: GNU Terry Pratchett Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 21/02/2021 14:37, Bruce Fields wrote: > On Sun, Feb 21, 2021 at 11:38:51AM +0000, Anton Ivanov wrote: >> On 21/02/2021 09:13, Salvatore Bonaccorso wrote: >>> On Sat, Feb 20, 2021 at 08:16:26PM +0000, Chuck Lever wrote: >>>> Confirming you are varying client-side kernels. Should the Linux >>>> NFS client maintainers be Cc'd? >>> Ok, agreed. Let's add them as well. NFS client maintainers any ideas >>> on how to trackle this? >> This is not observed with Debian backports 5.10 package >> >> uname -a >> Linux madding 5.10.0-0.bpo.3-amd64 #1 SMP Debian 5.10.13-1~bpo10+1 >> (2021-02-11) x86_64 GNU/Linux > I'm still unclear: when you say you tested a certain kernel: are you > varying the client-side kernel version, or the server side, or both at > once? Client side. This seems to be an entirely client side issue. A variety of kernels on the clients starting from 4.9 and up to 5.10 using 4.19 servers. I have observed it on a 4.9 client versus 4.9 server earlier. 4.9 fails, 4.19 fails, 5.2 fails, 5.4 fails, 5.10 works. At present the server is at 4.19.67 in all tests. Linux jain 4.19.0-6-amd64 #1 SMP Debian 4.19.67-2+deb10u2 (2019-11-11) x86_64 GNU/Linux I can set-up a couple of alternative servers during the week, but so far everything is pointing towards a client fs cache issue, not a server one. Brgds, > --b. > -- Anton R. Ivanov Cambridgegreys Limited. Registered in England. Company Number 10273661 https://www.cambridgegreys.com/