linux-ext4 - Re: [PATCH] ext2: Report metadata errors during fsync

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Message-Id: <20091125134858.97ca863d.akpm@linux-foundation.org>
Date:	Wed, 25 Nov 2009 13:48:58 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Jan Kara <jack@...e.cz>
Cc:	linux-ext4@...r.kernel.org, tytso@....edu, chris.mason@...cle.com
Subject: Re: [PATCH] ext2: Report metadata errors during fsync

On Wed, 25 Nov 2009 11:24:53 +0100
Jan Kara <jack@...e.cz> wrote:

> When an IO error happens while writing metadata buffers, we should better
> report it and call ext2_error since the filesystem is probably no longer
> consistent. Sometimes such IO errors happen while flushing thread does
> background writeback, the buffer gets later evicted from memory, and thus
> the only trace of the error remains as AS_EIO bit set in blockdevice's
> mapping. So we check this bit in ext2_fsync and report the error although
> we cannot be really sure which buffer we failed to write.

So this doesn't cause significant changes in runtime behaviour unless
the operator specified errors=remount-ro or errors=panic?
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