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=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=unavailable 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 3A7E8C46460 for ; Thu, 16 May 2019 17:18:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0834F20657 for ; Thu, 16 May 2019 17:18:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1558027097; bh=E6FuDq4ZEhJ0whJY8iLzeoTQeoYTjcI9Scr+CE+5PMo=; h=References:In-Reply-To:From:Date:Subject:To:Cc:List-ID:From; b=yzFW1Ps1tDCi48SGsLtAUOH00teZSDJn0seOBdpeqkpckUUZRfFp2FYu+RIlTX0n0 QR11I6S+wcd3PptH71Wyj5uUdA8rj1qcukSgmLCBJI8db/I1BPEDh+hY2eAH7Fo6uQ awx29jZHG/Rse/yOESvb0d305qA+sqDdgBhtt4wY= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727266AbfEPRSQ (ORCPT ); Thu, 16 May 2019 13:18:16 -0400 Received: from mail.kernel.org ([198.145.29.99]:49176 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726943AbfEPRSP (ORCPT ); Thu, 16 May 2019 13:18:15 -0400 Received: from mail-vs1-f48.google.com (mail-vs1-f48.google.com [209.85.217.48]) (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 DACE420848; Thu, 16 May 2019 17:18:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1558027095; bh=E6FuDq4ZEhJ0whJY8iLzeoTQeoYTjcI9Scr+CE+5PMo=; h=References:In-Reply-To:From:Date:Subject:To:Cc:From; b=R5U5A1TZYsPm7jp+A9fLeBth7dePmY2mA40hZ4p6q6oDxDJTwTnGsRzVs576dITkh rjxxCCKyG24WKVqpDLdj/MY5iN+MhlTTWmAoGs1UBGETekVWIdg0KNg0PxLJB/uuEw I9Z7+5eKrY8YxjPxOsfoLMZd3SGUKOcbcM6u0uJ4= Received: by mail-vs1-f48.google.com with SMTP id j184so2797796vsd.11; Thu, 16 May 2019 10:18:14 -0700 (PDT) X-Gm-Message-State: APjAAAWOAPLHPc7BKAAHai+IWzG0wRGA3miI0+pMr0ttIAlHzi+tIV1N tB70iYchrkB0Jmyr0y3JGDhvKW+C75ZwMqz15rA= X-Google-Smtp-Source: APXvYqz1RV8s1QJ3CVTGiY2RhVMONNipWOC3z/MEM9S1fmxq3V7rI1IhNzndXEnr4ydOdL4gyK/A2svcT0QbNYoqQw8= X-Received: by 2002:a67:f34d:: with SMTP id p13mr22894146vsm.95.1558027094032; Thu, 16 May 2019 10:18:14 -0700 (PDT) MIME-Version: 1.0 References: <20190515150221.16647-1-fdmanana@kernel.org> <20190516092848.GA6975@mit.edu> <20190516165921.GA4023@mit.edu> In-Reply-To: <20190516165921.GA4023@mit.edu> From: Filipe Manana Date: Thu, 16 May 2019 18:18:02 +0100 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH] fstests: generic, fsync fuzz tester with fsstress To: "Theodore Ts'o" Cc: fstests , linux-btrfs , linux-ext4 , Jan Kara , Filipe Manana Content-Type: text/plain; charset="UTF-8" Sender: linux-ext4-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-ext4@vger.kernel.org On Thu, May 16, 2019 at 5:59 PM Theodore Ts'o wrote: > > On Thu, May 16, 2019 at 10:54:57AM +0100, Filipe Manana wrote: > > > > Haven't tried ext4 with 1 process only (instead of 4), but I can try > > to see if it happens without concurrency as well. > > How many CPU's and how much memory were you using? And I assume this > was using KVM/QEMU? How was it configured? Yep, kvm and qemu (3.0.0). The qemu config: https://pastebin.com/KNigeXXq TEST_DEV is the drive with ID "drive1" and SCRATCH_DEV is the drive with ID "drive2". The host has: Intel(R) Core(TM) i7-8700 CPU @ 3.20GHz 64Gb of ram crappy seagate hdd: Device Model: ST3000DM008-2DM166 Serial Number: Z5053T2R LU WWN Device Id: 5 000c50 0a46f7ecb Firmware Version: CC26 User Capacity: 3,000,592,982,016 bytes [3,00 TB] Sector Sizes: 512 bytes logical, 4096 bytes physical Rotation Rate: 7200 rpm Form Factor: 3.5 inches Device is: Not in smartctl database [for details use: -P showall] ATA Version is: ACS-2, ACS-3 T13/2161-D revision 3b SATA Version is: SATA 3.1, 6.0 Gb/s (current: 6.0 Gb/s) It hosts 3 qemu instances, all with the same configuration. I left the test running earlier today for about 1 hour on ext4 with only 1 fsstress process. Didn't manage to reproduce. With 4 or more processes, those journal checksum failures happen sporadically. I can leave it running with 1 process during this evening and see what we get here, if it happens with 1 process, it should be trivial to reproduce anywhere. > > Thanks, > > - Ted