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=-1.0 required=3.0 tests=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 1CB91C282CE for ; Tue, 9 Apr 2019 07:57:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E124820651 for ; Tue, 9 Apr 2019 07:57:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726784AbfDIH5a convert rfc822-to-8bit (ORCPT ); Tue, 9 Apr 2019 03:57:30 -0400 Received: from mail.wl.linuxfoundation.org ([198.145.29.98]:46744 "EHLO mail.wl.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726062AbfDIH5a (ORCPT ); Tue, 9 Apr 2019 03:57:30 -0400 Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D387C28896 for ; Tue, 9 Apr 2019 07:57:29 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C74EA288A0; Tue, 9 Apr 2019 07:57:29 +0000 (UTC) From: bugzilla-daemon@bugzilla.kernel.org To: linux-ext4@vger.kernel.org Subject: [Bug 104571] ext4_mb_generate_buddy block bitmap and bg descriptor inconsistent Date: Tue, 09 Apr 2019 07:57:29 +0000 X-Bugzilla-Reason: None X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: AssignedTo fs_ext4@kernel-bugs.osdl.org X-Bugzilla-Product: File System X-Bugzilla-Component: ext4 X-Bugzilla-Version: 2.5 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: dpsenner@gmail.com X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P1 X-Bugzilla-Assigned-To: fs_ext4@kernel-bugs.osdl.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: cc Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8BIT X-Bugzilla-URL: https://bugzilla.kernel.org/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-Virus-Scanned: ClamAV using ClamSMTP Sender: linux-ext4-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-ext4@vger.kernel.org https://bugzilla.kernel.org/show_bug.cgi?id=104571 dpsenner (dpsenner@gmail.com) changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |dpsenner@gmail.com --- Comment #6 from dpsenner (dpsenner@gmail.com) --- We were recently hit by this issue, too on a physical x64 machine that hosts one kvm virtual machine guest with a windows server 2016 x64 operating system. The filesystem is a mdadm software raid1 spanning over two disks with ext4 on-top. $ uname -r 4.15.0-43-generic $ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 18.04.1 LTS Release: 18.04 Codename: bionic The filesystem of the physical machine went read only and effectively crashed all processes, including the guest operating system. A hard reset and disk check appears to have solved the symptom, but we have mixed feelings since we don't know about any collateral damage this may have caused. dmesg displays worrying information that is hopefully not a symptom of irreversible root filesystem corruption: systemd-journald[457]: File /var/log/journal/7346ea28f12b763f29b8995058d63291/user-1000.journal corrupted or uncleanly shut down, renaming and replacing. The symptom manifested while booting the guest machine and thus may well be related to a burst of random reads and writes of the kvm guest. We observed moderate disk activity in htop. -- You are receiving this mail because: You are watching the assignee of the bug.