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Date: Thu, 20 Apr 2006 02:59:53 -0700
From: Andrew Morton <akpm@osdl.org>
To: Pekka J Enberg <penberg@cs.Helsinki.FI>
Cc: torvalds@osdl.org, agk@redhat.com, linux-kernel@vger.kernel.org
Subject: Re: [PROBLEM] Device-mapper snapshot metadata userspace breakage
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Pekka J Enberg <penberg@cs.Helsinki.FI> wrote:
>
> The commit aa14edeb994f8f7e223d02ad14780bf2fa719f6d "[PATCH] device-mapper 
>  snapshot: load metadata on creation" breaks userspace and is blocking us 
>  from moving to the 2.6.16 series kernel. Debian doesn't have the 
>  new required LVM version in stable yet. Is the change intentional?

The changelog said

  If you're using lvm2, for this patch to work properly you should update
  to lvm2 version 2.02.01 or later and device-mapper version 1.02.02 or
  later.

Which was pretty bad of us.  I hope LVM 2.02.01 userspace is
back-compatible with older kernels?