linux-kernel - Re: EXT4-ish "fixes" in UBIFS

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Message-ID: <20090403063059.GO9870@mit.edu>
Date:	Fri, 3 Apr 2009 02:30:59 -0400
From:	Theodore Tso <tytso@....edu>
To:	"Trenton D. Adams" <trenton.d.adams@...il.com>
Cc:	David Rees <drees76@...il.com>,
	Christian Kujau <lists@...dbynature.de>,
	Artem Bityutskiy <Artem.Bityutskiy@...ia.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: EXT4-ish "fixes" in UBIFS

On Thu, Apr 02, 2009 at 11:15:29PM -0600, Trenton D. Adams wrote:
> 
> tdamac ~ # mount -t ext3 -o data=writeback,remount,rw /dev/s/sys /
> mount: / not mounted already, or bad option
> 
> Does it have to be done on initial mount?

Yes, which means you have to use the rootflags boot command-line
option.

It's a pain that we can't switch data= modes on the fly.  I believe
the problematic transiations are between data=journal and
data=!journal.  Transitions between data=ordered and data=writeback
should be easy to add.

						- Ted



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