On 08/18/2014 02:00 PM, Max Reitz wrote:
> Add options for specifying the size of the metadata caches. This can
> either be done directly for each cache (if only one is given, the other
> will be derived according to a default ratio) or combined for both.
> 
> Signed-off-by: Max Reitz <mreitz@redhat.com>
> ---
>  block/qcow2.c | 112 +++++++++++++++++++++++++++++++++++++++++++++++++++-------
>  block/qcow2.h |   3 ++
>  2 files changed, 103 insertions(+), 12 deletions(-)

I would suspect that you need to also modify qapi/block-core.json to
document the new QMP parameters that can be tuned when hot-plugging a
qcow2 disk.

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