From mboxrd@z Thu Jan  1 00:00:00 1970
From: Milan Broz <mbroz@redhat.com>
Date: Tue, 25 Oct 2011 15:34:00 +0200
Subject: [PATCH] Fix vgchange for sparse devices
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On 10/25/2011 03:03 PM, Mikulas Patocka wrote:
> Fix vgchange for sparse devices
> 
> If we create a sparse snapshot volume with "lvcreate --virtualsize", the volume
> is not activated or deactivated with vgchange.

this is already in tree btw.

But there are several problems with virtual origins because it was never properly implemented.
https://bugzilla.redhat.com/show_bug.cgi?id=733522
https://bugzilla.redhat.com/show_bug.cgi?id=738435

Milan