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=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 EFB13C3A5A7 for ; Tue, 3 Sep 2019 15:50:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D327A23431 for ; Tue, 3 Sep 2019 15:50:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729688AbfICPuF (ORCPT ); Tue, 3 Sep 2019 11:50:05 -0400 Received: from mx1.math.uh.edu ([129.7.128.32]:56392 "EHLO mx1.math.uh.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729393AbfICPuF (ORCPT ); Tue, 3 Sep 2019 11:50:05 -0400 Received: from epithumia.math.uh.edu ([129.7.128.2]) by mx1.math.uh.edu with esmtp (Exim 4.92) (envelope-from ) id 1i5B40-00036N-4s; Tue, 03 Sep 2019 10:50:03 -0500 Received: by epithumia.math.uh.edu (Postfix, from userid 7225) id 159ED801554; Tue, 3 Sep 2019 10:49:48 -0500 (CDT) From: Jason L Tibbitts III To: bfields@fieldses.org (J. Bruce Fields) Cc: linux-nfs@vger.kernel.org, km@cm4all.com, linux-kernel@vger.kernel.org Subject: Re: Regression in 5.1.20: Reading long directory fails References: <20190828174609.GB29148@fieldses.org> Date: Tue, 03 Sep 2019 10:49:48 -0500 In-Reply-To: (Jason L. Tibbitts, III's message of "Wed, 28 Aug 2019 13:29:00 -0500") Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org >>>>> "JLT" == Jason L Tibbitts writes: JLT> Certainly a server reboot, or maybe even just JLT> unmounting and remounting the filesystem or copying the data to JLT> another filesystem would tell me that. In any case, as soon as I JLT> am able to mess with that server, I'll know more. Rebooting the server did not make any difference, and now more users are seeing the problem. At this point I'm in a state where NFS simply isn't reliable at all, and I'm not sure what to do. If Centos 8 were out, I'd work on moving to that just so that the server was a little more modern. (Currently the server is Centos 7.) I guess I could try using Fedora, or installing one of the upstream kernels, just in case this has to do with some interaction between the client and the old RHEL7 kernel. I do have a packet capture of a directory listing that fails with EIO, but I'm not sure if it's safe to simply post it, and I'm not sure what tshark options would be useful in decoding it. I do know that I can rsync one of the problematic directories to a different server (running the same kernel) and it doesn't have the same problem. What I'll try next is rsyncing to a different filesystem on the same server, but again I'll have to wait until people log off to do proper testing. - J<