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Re: [Qemu-devel] [PATCH v7 3/4] qcow2: add shrink image support
From: |
Eric Blake |
Subject: |
Re: [Qemu-devel] [PATCH v7 3/4] qcow2: add shrink image support |
Date: |
Thu, 17 Aug 2017 06:04:49 -0500 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.2.1 |
On 08/17/2017 04:15 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 <address@hidden>
> Reviewed-by: Max Reitz <address@hidden>
> ---
> +++ b/qapi/block-core.json
> @@ -2495,7 +2495,8 @@
> '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 of the new enum members (at a minimum, something
that says 'since 2.11').
--
Eric Blake, Principal Software Engineer
Red Hat, Inc. +1-919-301-3266
Virtualization: qemu.org | libvirt.org
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