linux-ext4 - Re: EXT3 way too happy with write errors

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Message-ID: <20081218171825.GD20515@hostway.ca>
Date:	Thu, 18 Dec 2008 09:18:25 -0800
From:	Simon Kirby <sim@...nation.com>
To:	Jan Kara <jack@...e.cz>
Cc:	linux-ext4@...r.kernel.org
Subject: Re: EXT3 way too happy with write errors

On Thu, Dec 18, 2008 at 06:07:14PM +0100, Jan Kara wrote:

>   Hello,
> 
>   This was quite a long time ago but it seems nobody replied yet :).

Thanks :)

>   What kernel version is this? Originally, we aborted a journal only if

At the time, this was 2.6.26.5.

> we spotted a write error in filesystem metadata. If we spotted an error
> in data, we just complained but continued. This seems to be exactly the
> thing you are hitting. Latest Linus's tree (i.e. 2.6.28-rc5 or so) should
> have the patches that allow tuning the behavior in data=ordered mode - i.e.
> you can tell the filesystem by data_err=abort and data_err=ignore option
> whether it should abort the filesystem or ignore write error in fs data.

Cool, but one question.. Can you think of a case where anyone would ever
want data_err=ignore?

Should this really be a knob?

Simon-
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