From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from relay.sgi.com (relay3.corp.sgi.com [198.149.34.15]) by oss.sgi.com (Postfix) with ESMTP id 38D147F3F for ; Thu, 17 Dec 2015 08:58:33 -0600 (CST) Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by relay3.corp.sgi.com (Postfix) with ESMTP id DA79FAC001 for ; Thu, 17 Dec 2015 06:58:29 -0800 (PST) Received: from mail-wm0-f66.google.com (mail-wm0-f66.google.com [74.125.82.66]) by cuda.sgi.com with ESMTP id LZyLkEZWJE8LEDpQ (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NO) for ; Thu, 17 Dec 2015 06:58:28 -0800 (PST) Received: by mail-wm0-f66.google.com with SMTP id r67so3954983wmg.3 for ; Thu, 17 Dec 2015 06:58:28 -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 e136sm2669180wma.23.2015.12.17.06.58.25 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 17 Dec 2015 06:58:26 -0800 (PST) Received: from localhost (localhost [127.0.0.1]) by Telcontar.valinor (Postfix) with ESMTP id 2A9C8611C7 for ; Thu, 17 Dec 2015 15:58:25 +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 21sc0i2i_Quv for ; Thu, 17 Dec 2015 15:58:25 +0100 (CET) Received: from [127.0.0.1] (localhost [127.0.0.1]) by Telcontar.valinor (Postfix) with ESMTP id D8F0C60E99 for ; Thu, 17 Dec 2015 15:58:24 +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: <5672CD90.7020805@opensuse.org> Date: Thu, 17 Dec 2015 15:58:24 +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 mail list -----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. > > --D That's my understanding, too, but after some point in time, not initially. 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 also have the vague feeling that once (years ago) 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) iEYEARECAAYFAlZyzYkACgkQtTMYHG2NR9VDNwCfehM5NHMAgZuuzLf99kKulLKI AkAAnjt4mZngHZdH5v60T+P6tnnFzUiO =Pw+f -----END PGP SIGNATURE----- _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs