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=-1.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_PASS,T_DKIMWL_WL_HIGH 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 126EBC46460 for ; Wed, 15 Aug 2018 12:28:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AFFE92083E for ; Wed, 15 Aug 2018 12:28:37 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="IMzWYPaa" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org AFFE92083E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729269AbeHOPUe (ORCPT ); Wed, 15 Aug 2018 11:20:34 -0400 Received: from mail.kernel.org ([198.145.29.99]:41108 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728810AbeHOPUe (ORCPT ); Wed, 15 Aug 2018 11:20:34 -0400 Received: from mail-wr1-f54.google.com (mail-wr1-f54.google.com [209.85.221.54]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 8160920936; Wed, 15 Aug 2018 12:28:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1534336114; bh=WB25Zy96CI7tsNORR1LIWT3BRQef+J5nxOwbhdmadYQ=; h=From:Date:Subject:To:Cc:From; b=IMzWYPaaV/Y+mh8GFHo3MeMzbeiboGijzdobFmYGIa5XpbqRswhnIRZFexHIV6R1C 553B5wkeOAHdg70zLmk6ZEkWZuyvXgRRNwpXpYw1Pa+BB+AE3HqX/rHyjaA8sPYzQu TFDBYZgxq9rvfRJP3OSMjb3WJdHMBSrwD76PQNeQ= Received: by mail-wr1-f54.google.com with SMTP id b15-v6so970425wrv.10; Wed, 15 Aug 2018 05:28:34 -0700 (PDT) X-Gm-Message-State: AOUpUlE/ZGMkRoNoviLg3zPIEkxe1EGdykncfjmJiX/wL9GJyrp7oOp8 YEQCGDdhREzseBqLBdD3SKGiODFWjCAKprKwL+s= X-Google-Smtp-Source: AA+uWPx6oxoay4Wwnkdp9B3uf/6Stp9wNiB6cKu3WPi+/tm/vT9R1AjyUwmVcBdNti5TIVbjrDa/DClJLNRkoGMQSA8= X-Received: by 2002:adf:cd0e:: with SMTP id w14-v6mr15835930wrm.226.1534336113032; Wed, 15 Aug 2018 05:28:33 -0700 (PDT) MIME-Version: 1.0 Received: by 2002:adf:9141:0:0:0:0:0 with HTTP; Wed, 15 Aug 2018 05:28:32 -0700 (PDT) From: Krzysztof Kozlowski Date: Wed, 15 Aug 2018 14:28:32 +0200 X-Gmail-Original-Message-ID: Message-ID: Subject: [BUG][BISECT] NFSv4 root failures after "fs/locks: allow a lock request to block other requests." To: NeilBrown , Jeff Layton Cc: Alexander Viro , "J. Bruce Fields" , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, "linux-samsung-soc@vger.kernel.org" Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, Bisect pointed commit ce3147990450a68b3f549088b30f087742a08b5d ("fs/locks: allow a lock request to block other requests.") to failure boot of NFSv4 with root on several boards. Log is here: https://krzk.eu/#/builders/21/builds/836/steps/12/logs/serial0 With several errors: kernel BUG at ../fs/locks.c:336! Unable to handle kernel NULL pointer dereference at virtual address 00000004 Configuration: 1. exynos_defconfig 2. Arch ARM Linux 3. Boards: a. Odroid family (ARMv7, octa-core (Cortex-A7+A15), Exynos5422 SoC) b. Toradex Colibri VF50 (ARMv7, UP, Cortex-A5) 4. Systemd: v236, 238 5. All boards boot from TFTP with NFS root (NFSv4) On Colibri VF50 I got slightly different errors: [ 11.663204] Internal error: Oops - undefined instruction: 0 [#1] ARM [ 12.455273] Unable to handle kernel NULL pointer dereference at virtual address 00000004 and only with some specific GCC (v6.3) or with other conditions which I did not bisect yet. Maybe Colibri's failure is unrelated to that commit. Best regards, Krzysztof