linux-ext4 - Re: [PATCH] Add ext3 data=guarded mode

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Date:	Fri, 17 Apr 2009 13:04:36 +0200
From:	Mike Galbraith <efault@....de>
To:	Chris Mason <chris.mason@...cle.com>
Cc:	Jan Kara <jack@...e.cz>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Theodore Ts'o <tytso@....edu>,
	Linux Kernel Developers List <linux-kernel@...r.kernel.org>,
	Ext4 Developers List <linux-ext4@...r.kernel.org>
Subject: Re: [PATCH] Add ext3 data=guarded mode

On Thu, 2009-04-16 at 15:42 -0400, Chris Mason wrote:
> Hello everyone,
> 
> Here's an updated (v4) patch for ext3 data=guarded mode.  The first two
> patches in the series are unchanged, and it looks like Linus pulled them
> in this morning.
> 
> This version fixes the bug Mike Galbraith hit.  The problem was with
> writes to the last block in the file that made the file bigger but
> didn't actually add a new block.  Since the block wasn't new, it
> wouldn't get sent through the guarded code and the on disk i_size wasn't
> always updated.

FWIW, I booted my backup fs drive mounted data=guarded, and have been
hammering it steadily since 6 A.M. with no hint of trouble.

	-Mike

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