On 07/25/2014 12:07 PM, Max Reitz wrote:
> Currently, we have a bitmap for keeping track of which clusters have
> been created during the zero cluster expansion process. This was
> necessary because we need to properly increase the refcount for shared
> L2 tables.
> 
> However, now we can simply take the L2 refcount and use it for the
> cluster allocated for expansion. This will be the correct refcount and
> therefore we don't have to remember that cluster having been allocated
> any more.
> 
> Signed-off-by: Max Reitz <mreitz@redhat.com>
> ---
>  block/qcow2-cluster.c | 83 +++++++++++++--------------------------------------
>  1 file changed, 21 insertions(+), 62 deletions(-)

Slick - less code, and faster operation :)

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org