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=-2.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 ABA3CC4338F for ; Sun, 8 Aug 2021 22:38:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7DEFD60C40 for ; Sun, 8 Aug 2021 22:38:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230509AbhHHWiU (ORCPT ); Sun, 8 Aug 2021 18:38:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57196 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230175AbhHHWiU (ORCPT ); Sun, 8 Aug 2021 18:38:20 -0400 Received: from mail-pl1-x62a.google.com (mail-pl1-x62a.google.com [IPv6:2607:f8b0:4864:20::62a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 347F8C061760 for ; Sun, 8 Aug 2021 15:38:00 -0700 (PDT) Received: by mail-pl1-x62a.google.com with SMTP id e19so845732pla.10 for ; Sun, 08 Aug 2021 15:38:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to; bh=+90glai/oIN+mQa+A7cK2HodA+5Tq3QYPjmnG9JtgOE=; b=KbCYHyYC3cuzbK1xnpIDFGCutLPjFecHUAApKWe/qtN8pbBTuV9qxbojDquyLjSLA8 RKIQAxh1tMGfs56LGTXX07r+lRyYBi4fpxNaTdxAOX116sCKHAc+MlHn1BZ80gtzm9RB VjDs5W0P2Q+Did1YIVpvxODCd3Me/nuXJdqxUlDmN8JDIX7nvtTgg4808/iJWNxM+D58 A1rXEB795hkF3GqW9+RY5MERlroYHxqPJayCcdOLp2JBRLo1V9ZhY19qIMUmlrcd9UcJ q8znUwrtYI6cvSPsSBspBTpnd/I9k8lNnaOwDXcLLStysC1wfEHSNnpHRNE+8Za1y35r MtzQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=+90glai/oIN+mQa+A7cK2HodA+5Tq3QYPjmnG9JtgOE=; b=ZvjTNsJxfvXdvDH01nN5gO1G2b8ovjRbRZYeD1QRUx/M6axZVq+StCVBLfDDuHPouZ DJihK+BoVxB2tB5DhNW9LyNQ16CpQDUQI/spjx4Uhmjj4Lm5uXQVJ4qQfXReBv1Hx5C1 mmPq9fzd/r8zsapf2hs/Sb7EywWdAKHOLCi65N1EVxINx6MHd98MbGtDzl8LPiYv1uAW un/VOT5oFfvihA+GRwWRXG8atKTOoncDzafJaV/+YIiqGiefRLYonHt4/7gXVhVdprRa epPy6KyP+KNNTHljrfHklQ3Qj+Jqi8t0SeDiSZv1OpGi7+BOJ7X0FLZidfjUsC+p8Ohc 8Y7g== X-Gm-Message-State: AOAM533AIqEz7gP8dyzWFY102M0bmdvG74Pb4NN1cgHz56H0wGEWP1Js Cho7lQ9YOnraCA59WZxb8JTerCbTZemSoS/qKEUcgtJM1jMhZA== X-Google-Smtp-Source: ABdhPJxwRE4vZOvDBaEs904TU+KBa2zT7Y6nUhDsW0WF0qrnwCzy6km1Z1E3+p/7nYNNUIKc3kNeyRqRPGO1Z7Ee+s0= X-Received: by 2002:a05:6a00:ac6:b029:374:a33b:a74 with SMTP id c6-20020a056a000ac6b0290374a33b0a74mr15581368pfl.51.1628462279449; Sun, 08 Aug 2021 15:37:59 -0700 (PDT) MIME-Version: 1.0 From: Mike Javorski Date: Sun, 8 Aug 2021 15:37:48 -0700 Message-ID: Subject: NFS server regression in kernel 5.13 (tested w/ 5.13.9) To: linux-nfs@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org I have been experiencing nfs file access hangs with multiple release versions of the 5.13.x linux kernel. In each case, all file transfers freeze for 5-10 seconds and then resume. This seems worse when reading through many files sequentially. My server: - Archlinux w/ a distribution provided kernel package - filesystems exported with "rw,sync,no_subtree_check,insecure" options Client: - Archlinux w/ latest distribution provided kernel (5.13.9-arch1-1 at writing) - nfs mounted via /net autofs with "soft,nodev,nosuid" options (ver=4.2 is indicated in mount) I have tried the 5.13.x kernel several times since the first arch release (most recently with 5.13.9-arch1-1), all with similar results. Each time, I am forced to downgrade the linux package to a 5.12.x kernel (5.12.15-arch1 as of writing) to clear up the transfer issues and stabilize performance. No other changes are made between tests. I have confirmed the freezing behavior using both ext4 and btrfs filesystems exported from this server. At this point I would appreciate some guidance in what to provide in order to diagnose and resolve this issue. I don't have a lot of kernel debugging experience, so instruction would be helpful. - mike