From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from relay.sgi.com (relay2.corp.sgi.com [137.38.102.29]) by oss.sgi.com (Postfix) with ESMTP id 82BDB7F3F for ; Thu, 17 Dec 2015 08:35:25 -0600 (CST) Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by relay2.corp.sgi.com (Postfix) with ESMTP id 564FB304059 for ; Thu, 17 Dec 2015 06:35:25 -0800 (PST) Received: from mail-wm0-f67.google.com (mail-wm0-f67.google.com [74.125.82.67]) by cuda.sgi.com with ESMTP id 5wKiqEqwQ4X2F3n7 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NO) for ; Thu, 17 Dec 2015 06:35:23 -0800 (PST) Received: by mail-wm0-f67.google.com with SMTP id r67so3810135wmg.3 for ; Thu, 17 Dec 2015 06:35:23 -0800 (PST) Received: from Telcontar.valinor (188.Red-88-20-209.staticIP.rima-tde.net. [88.20.209.188]) by smtp.gmail.com with ESMTPSA id i84sm2598365wmc.20.2015.12.17.06.35.20 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 17 Dec 2015 06:35:20 -0800 (PST) Received: from localhost (localhost [127.0.0.1]) by Telcontar.valinor (Postfix) with ESMTP id ABDC4611C7 for ; Thu, 17 Dec 2015 15:35:19 +0100 (CET) Received: from Telcontar.valinor ([127.0.0.1]) by localhost (Telcontar.valinor [127.0.0.1]) (amavisd-new, port 10024) with LMTP id iG_FvMtAaySA for ; Thu, 17 Dec 2015 15:35:19 +0100 (CET) Received: from [127.0.0.1] (localhost [127.0.0.1]) by Telcontar.valinor (Postfix) with ESMTP id 583E660E99 for ; Thu, 17 Dec 2015 15:35:18 +0100 (CET) Subject: Re: Ideas on unified real-ro mount option across all filesystems References: <567212DA.8050808@cn.fujitsu.com> <567228EF.80007@redhat.com> <20151217032652.GD10582@birch.djwong.org> From: "Carlos E. R." Message-ID: <5672C826.2010901@opensuse.org> Date: Thu, 17 Dec 2015 15:35:18 +0100 MIME-Version: 1.0 In-Reply-To: <20151217032652.GD10582@birch.djwong.org> List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: xfs-bounces@oss.sgi.com Sender: xfs-bounces@oss.sgi.com To: xfs@oss.sgi.com -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 2015-12-17 04:26, Darrick J. Wong wrote: > On Wed, Dec 16, 2015 at 09:15:59PM -0600, Eric Sandeen wrote: >> I have always interpreted it as simply "no user changes to the >> filesystem," and that is clearly what the vfs does with the >> flag... > > That ("-o ro means no user changes") has always been my > understanding too. You /want/ the FS to replay the journal on an > RO mount so that regular FS operation picks up the committed > transactions. That's my understanding, too, but after some point in time. It was explained to me some years ago after I found out that a disk image mounted read only was modified. The trick was to make the image '-w'. I have the vague feeling that once I found a problem when a mount failed or crashed when the image was ro. Just a user view on this :-) - -- Cheers / Saludos, Carlos E. R. (from 13.1 x86_64 "Bottle" at Telcontar) -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iEYEARECAAYFAlZyyBsACgkQtTMYHG2NR9VDYACfRd6Zzd60JzX6LoW1F2K4fSai OJAAoJXgLlcrlFZy1U2MzCBaQ4cz0EmP =s8oq -----END PGP SIGNATURE----- _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs