linux-ext4 - Re: [PATCH 1/4] ext3: enable barriers by default

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Message-ID: <20080519085842.GA2013@elf.ucw.cz>
Date:	Mon, 19 May 2008 10:58:42 +0200
From:	Pavel Machek <pavel@...e.cz>
To:	Eric Sandeen <sandeen@...hat.com>
Cc:	ext4 development <linux-ext4@...r.kernel.org>,
	linux-kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jamie Lokier <jamie@...reable.org>
Subject: Re: [PATCH 1/4] ext3: enable barriers by default

On Fri 2008-05-16 14:05:55, Eric Sandeen wrote:
> I can't think of any valid reason for ext3 to not use barriers when
> they are available;  I believe this is necessary for filesystem
> integrity in the face of a volatile write cache on storage.
> 
> An administrator who trusts that the cache is sufficiently battery-
> backed (and power supplies are sufficiently redundant, etc...)
> can always turn it back off again.
> 
> SuSE has carried such a patch for quite some time now.
> 
> Also document the mount option while we're at it.
> 
> Signed-off-by: Eric Sandeen <sandeen@...hat.com>
> Acked-by: Jan Kara <jack@...e.cz>

Yes please. Safe defaults are the way to go.
								Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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