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=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS autolearn=ham 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 6983DC282CB for ; Tue, 5 Feb 2019 18:12:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4B3B42175B for ; Tue, 5 Feb 2019 18:12:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726685AbfBESMv (ORCPT ); Tue, 5 Feb 2019 13:12:51 -0500 Received: from mx1.math.uh.edu ([129.7.128.32]:54526 "EHLO mx1.math.uh.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726534AbfBESMv (ORCPT ); Tue, 5 Feb 2019 13:12:51 -0500 Received: from c-73-155-225-101.hsd1.tx.comcast.net ([73.155.225.101] helo=hippogriff.math.uh.edu) by mx1.math.uh.edu with esmtpsa (TLSv1.3:TLS_AES_256_GCM_SHA384:256) (Exim 4.91) (envelope-from ) id 1gr5DE-0005mX-Pf; Tue, 05 Feb 2019 12:12:49 -0600 From: Jason Tibbitts To: Trond Myklebust Cc: "Anna.Schumaker\@netapp.com" , "linux-nfs\@vger.kernel.org" , "Chuck.Lever\@oracle.com" Subject: Re: Need help debugging NFS issues new to 4.20 kernel References: Date: Tue, 05 Feb 2019 12:12:45 -0600 In-Reply-To: (Jason L. Tibbitts, III's message of "Fri, 25 Jan 2019 13:51:30 -0600") Message-ID: <87ftt2cdeq.fsf@hippogriff.math.uh.edu> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org >>>>> "JLT" == Jason L Tibbitts writes: JLT> I wonder, though; is that likely to be the root of the problem I'm JLT> seeing? The commit description talks about this as a performance JLT> regression, but I'm seeing a complete loss of NFS functionality. It turns out that 4.20.6 (which has the patch in question) does not appear to solve my issue. At least, I've still had a few complete NFS hangups on machines running 4.20.6 though I haven't had a chance to closely inspect one yet. As before, any hints about how I could best debug this issue would be appreciated. - J<