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To: Alasdair G Kergon <agk@redhat.com>
cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH] 3/5: Device-mapper: snapshots
References: <22Gkd-1AX-17@gated-at.bofh.it>
From: Andi Kleen <ak@muc.de>
Date: Wed, 02 Jun 2004 20:06:06 +0200
In-Reply-To: <22Gkd-1AX-17@gated-at.bofh.it> (Alasdair G. Kergon's message
 of "Wed, 02 Jun 2004 18:00:29 +0200")
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Alasdair G Kergon <agk@redhat.com> writes:
> +
> +/*-----------------------------------------------------------------
> + * Persistent snapshots, by persistent we mean that the snapshot
> + * will survive a reboot.
> + *---------------------------------------------------------------*/

Is this target supposed to be crash safe? What happens when
the computer crashes while writing to such a volume?

I suppose it would need barriers for that at least, which it doesn't
seem to use.

-Andi