On 07/07/2017 09:30 AM, Pavel Butsykin wrote: > This patch add shrinking of the image file for qcow2. As a result, this allows > us to reduce the virtual image size and free up space on the disk without > copying the image. Image can be fragmented and shrink is done by punching > holes > in the image file. > > Signed-off-by: Pavel Butsykin <pbutsy...@virtuozzo.com> > --- > block/qcow2-cluster.c | 40 +++++++++++++++++++ > block/qcow2-refcount.c | 103 > +++++++++++++++++++++++++++++++++++++++++++++++++ > block/qcow2.c | 42 +++++++++++++++----- > block/qcow2.h | 14 +++++++ > qapi/block-core.json | 3 +- > 5 files changed, 191 insertions(+), 11 deletions(-) >
> +++ b/qapi/block-core.json > @@ -2372,7 +2372,8 @@ > 'cluster_alloc_bytes', 'cluster_free', 'flush_to_os', > 'flush_to_disk', 'pwritev_rmw_head', 'pwritev_rmw_after_head', > 'pwritev_rmw_tail', 'pwritev_rmw_after_tail', 'pwritev', > - 'pwritev_zero', 'pwritev_done', 'empty_image_prepare' ] } > + 'pwritev_zero', 'pwritev_done', 'empty_image_prepare', > + 'l1_shrink_write_table', 'l1_shrink_free_l2_clusters' ] } Missing documentation for the additions. -- Eric Blake, Principal Software Engineer Red Hat, Inc. +1-919-301-3266 Virtualization: qemu.org | libvirt.org
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