On Wed, Jun 19, 2013 at 01:44:16PM +0200, Kevin Wolf wrote:
> This series adds options to make qcow2 discard freed clusters, in several
> categories. By default, only freed clusters related to snapshots (i.e. mainly
> snapshot deletion) are discarded.
> 
> v2:
> - Removed leftover debug code
> - Don't discard after COW (overwriting compressed clusters)
> - Changed some commas into semicolons
> 
> Kevin Wolf (5):
>   Revert "block: Disable driver-specific options for 1.5"
>   qcow2: Add refcount update reason to all callers
>   qcow2: Options to enable discard for freed clusters
>   qcow2: Batch discards
>   block: Always enable discard on the protocol level
> 
>  block.c                  |   2 +-
>  block/qcow2-cluster.c    |  41 ++++++++++----
>  block/qcow2-refcount.c   | 136 
> +++++++++++++++++++++++++++++++++++++++--------
>  block/qcow2-snapshot.c   |   6 ++-
>  block/qcow2.c            |  30 ++++++++++-
>  block/qcow2.h            |  32 +++++++++--
>  blockdev.c               | 118 ++--------------------------------------
>  tests/qemu-iotests/group |   2 +-
>  8 files changed, 214 insertions(+), 153 deletions(-)
> 
> -- 
> 1.8.1.4
> 

Thanks, applied to my block tree:
https://github.com/stefanha/qemu/commits/block

Stefan

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