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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A4DD2C433F5 for ; Sat, 11 Dec 2021 00:09:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244113AbhLKANT (ORCPT ); Fri, 10 Dec 2021 19:13:19 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51718 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237677AbhLKANT (ORCPT ); Fri, 10 Dec 2021 19:13:19 -0500 Received: from mail-pl1-x634.google.com (mail-pl1-x634.google.com [IPv6:2607:f8b0:4864:20::634]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D1421C061714 for ; Fri, 10 Dec 2021 16:09:43 -0800 (PST) Received: by mail-pl1-x634.google.com with SMTP id y8so7332751plg.1 for ; Fri, 10 Dec 2021 16:09:43 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:from:mime-version:subject:date:message-id :references:cc:in-reply-to:to; bh=1+qgrk5AS3qqzgNJdFLV7zq7Tf+TLnOirNe64zTymI0=; b=ZXJrq65mSTDiJVsMB8MXGmHwqJZz99CQlqdzq5bGIpNUS2BHwNYtJRFkgOlt/Zp91D wqZpBh9pXQzqFJrnYbKbXNQ+OGRy3cbWZYhvwVtYDyNfpvZ78Vqj7F2RomVu/yTlOYNr ZljuEuywact/laM702R5dCiCLmzkoPLIT5RT9jNS391WmqkigmCKav6cgeT+8Frc8xjz 5r23Vkx9HSVybNU/eHEVjJD+Xtmg5bAe4KsUJC+bIFVVZVRxJdSTaY9QWyJVg8JOxp3i kPGPQa8ZtR5n/X4Nx9V24WVw5G/NmYs04y3hsJzKjxMPN1ri0rlvPjETiZansOEtdwpR OkTA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:content-transfer-encoding:from:mime-version :subject:date:message-id:references:cc:in-reply-to:to; bh=1+qgrk5AS3qqzgNJdFLV7zq7Tf+TLnOirNe64zTymI0=; b=PwQTMAJuLb0LB2nUekgsKfdwkNngzsXIlXgR8a2ixaGX0/b9EBw9cmOhmxG2QEADhn DAdNaLMQDqZ7KiG3yRrHRLEQVKqJ3s0F/7/BUYNf/fIGxG1Abmz7SfjepILRMwANRMKy k3bJBn+Krt3BKUxo06Sl8ELCN5mswOjZV9IdWbbV+wbzfMpguXJk0oqC9Xpcwmnmzdux FZns8hqLDCU37igE1oIAcZ6VlDcpIcjrlbcxZQrUDTOMT+jwwAWScpYcnq7lN75Ly1qA QlJ2c1i/9meFgGnm8eFEWwG56q16MJuTDImWhnJ+QsxM5PKjw/XydUUm1e2HuwVoZ/bY e+Aw== X-Gm-Message-State: AOAM533ecyKs7CUie7C1tlqv8tl7Apb1hwM1whoF956PCZt+hmfLc2Hf ai3sAeWTTMI3WcgPlqvoZ3Az4hXoPhE= X-Google-Smtp-Source: ABdhPJyHDg/n1Nxs6fv7bnca0Uku2GrJkFahqk3px1ICaC29NJ68jRt0RqSLyaZ5QKD4VFAjTZBg4A== X-Received: by 2002:a17:902:a714:b0:143:d007:412f with SMTP id w20-20020a170902a71400b00143d007412fmr77576246plq.18.1639181383053; Fri, 10 Dec 2021 16:09:43 -0800 (PST) Received: from smtpclient.apple ([216.9.31.138]) by smtp.gmail.com with ESMTPSA id y11sm4130802pfg.204.2021.12.10.16.09.42 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 10 Dec 2021 16:09:42 -0800 (PST) Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable From: Chanchal Mathew Mime-Version: 1.0 (1.0) Subject: Re: XFS journal log resetting Date: Fri, 10 Dec 2021 16:09:41 -0800 Message-Id: <24D44CB5-F383-4F2A-B9C3-87770DFD7CDB@gmail.com> References: <20211210213649.GQ449541@dread.disaster.area> Cc: linux-xfs@vger.kernel.org In-Reply-To: <20211210213649.GQ449541@dread.disaster.area> To: Dave Chinner X-Mailer: iPhone Mail (19B74) Precedence: bulk List-ID: X-Mailing-List: linux-xfs@vger.kernel.org Thank you for the explanation! Wouldn=E2=80=99t we expect zero pending modification or no unwritten data wh= en a device is cleanly unmounted? Or do you mean, a successful =E2=80=98umou= nt=E2=80=99 run on the device doesn=E2=80=99t guarantee there are no pending= changes? The devices I=E2=80=99m testing on are image files with same amount of data.= One with lower log number is quicker to mount.=20 $ sudo xfs_logprint -t /dev/mapper/loop0p1 =E2=80=A6 log tail: 451 head: 451 state: Whereas, the one with higher log number, such as the one below, is about 4-5= times slower running xlog_find_tail(). $ sudo xfs_logprint -t /dev/mapper/loop0p1 =E2=80=A6 log tail: 17658 head: 17658 state: The images are of same size, and have same amount of data as well (as verifi= ed by df and df -i once mounted) The only way I can work around this delay for an instance started from an im= age file with higher log number is, to reset it to 0 with xfs_repair.=20 Chanchal=20=