linux-kernel - Re: vfs: Add MS_FLUSHONFSYNC mount flag

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Message-ID: <20090213122051.GX8830@disturbed>
Date:	Fri, 13 Feb 2009 23:20:51 +1100
From:	Dave Chinner <david@...morbit.com>
To:	Eric Sandeen <sandeen@...hat.com>
Cc:	Fernando Luis Vázquez Cao 
	<fernando@....ntt.co.jp>, Jan Kara <jack@...e.cz>,
	Theodore Tso <tytso@....EDU>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Pavel Machek <pavel@...e.cz>,
	kernel list <linux-kernel@...r.kernel.org>,
	Jens Axboe <jens.axboe@...cle.com>, fernando@....ac.jp,
	Ric Wheeler <rwheeler@...hat.com>
Subject: Re: vfs: Add MS_FLUSHONFSYNC mount flag

On Fri, Feb 13, 2009 at 12:20:17AM -0600, Eric Sandeen wrote:
> I'm just a little leery of the "dangerous" mount option proliferation, I
> guess.

You're not the only one, Eric. It's bad enough having to explain to
users what barriers do once they have lost data after a power loss,
let alone confusing them further by adding more mount options they
will get wrong by accident....

Quite frankly, the VFS should do stuff that is slow and safe
and filesystems can choose to ignore the VFS (via filesystem
specific mount options) if they want to be fast and potentially
unsafe.

Cheers,

Dave.
-- 
Dave Chinner
david@...morbit.com
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