From: Eric Sandeen Subject: Re: Lazytime undone by/not working with remount? Date: Mon, 18 May 2015 10:18:39 -0500 Message-ID: <555A02CF.1000506@redhat.com> References: <55575399.6010801@googlemail.com> <20150518082135.GK4834@ws.net.home> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: linux-ext4@vger.kernel.org, "Theodore Ts'o" To: Karel Zak , =?windows-1252?Q?Holger_Hoffst=E4tte?= Return-path: Received: from mx1.redhat.com ([209.132.183.28]:58016 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753061AbbERPSk (ORCPT ); Mon, 18 May 2015 11:18:40 -0400 In-Reply-To: <20150518082135.GK4834@ws.net.home> Sender: linux-ext4-owner@vger.kernel.org List-ID: On 5/18/15 3:21 AM, Karel Zak wrote: > On Sat, May 16, 2015 at 04:26:33PM +0200, Holger Hoffst=E4tte wrote: >>> playing with lazytime on 4.0.4-rc1 + yesterday's fencepost patch) I= noticed >>> something odd. Mounting secondary (non-root) partitions with lazyti= me works >>> fine, but / does not seem to retain the value from fstab - apparent= ly because >>> it is remounted rw during boot, and lazytime gets swallowed/undone. >>> >>> Same effect when trying to remount manually with lazytime: >>> >>> tux>findmnt / >>> TARGET SOURCE FSTYPE OPTIONS >>> / /dev/sda1 ext4 rw,noatime >>> >>> tux>mount -o lazytime,remount /=20 >>> >>> tux>dmesg=20 >>> [ 5208.482505] EXT4-fs (sda1): re-mounted. Opts: (null) >>> >>> tux>findmnt / =20 >>> TARGET SOURCE FSTYPE OPTIONS >>> / /dev/sda1 ext4 rw,noatime >>> >>> tux>mount --version >>> mount from util-linux 2.26.2 (libmount 2.26.0: assert, debug) And what does /proc/mounts say? That'll tell you what is actually set on the superblock. Works here, on 4.1.0-rc2: # mount /dev/sdb1 /mnt/test # mount -o remount,lazytime /mnt/test # grep sdb1 /proc/mounts=20 /dev/sdb1 /mnt/test ext4 rw,lazytime,seclabel,relatime,data=3Dordered 0= 0 # dmesg | tail -n 2 [516203.450943] EXT4-fs (sdb1): mounted filesystem with ordered data mo= de. Opts: (null) [516211.222020] EXT4-fs (sdb1): re-mounted. Opts: lazytime -Eric -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html