[libvirt] [PATCH] Document behavior of compat when creating qcow2 volumes

Peter Krempa pkrempa at redhat.com
Tue Mar 24 16:43:41 UTC 2015


On Tue, Mar 24, 2015 at 17:21:26 +0100, Ján Tomko wrote:
> Commit bab2eda changed the behavior for missing compat attribute,
> but failed to update the documentation.
> 
> Before, the option was omitted from qemu-img command line and the
> qemu-img default was used. Now we always specify the compat value
> and the default is 0.10.
> 
> Reported by Christophe Fergeau
> https://bugzilla.gnome.org/show_bug.cgi?id=746660#c4
> ---
>  docs/formatstorage.html.in | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/docs/formatstorage.html.in b/docs/formatstorage.html.in
> index d2e2bb8..9c7b1bd 100644
> --- a/docs/formatstorage.html.in
> +++ b/docs/formatstorage.html.in
> @@ -588,8 +588,9 @@
>          <code>type='qcow2'</code> volumes. Valid values are <code>0.10</code>
>          and <code>1.1</code> so far, specifying QEMU version the images should
>          be compatible with. If the <code>feature</code> element is present,
> -        1.1 is used. If omitted, qemu-img default is used.
> -        <span class="since">Since 1.1.0</span>
> +        1.1 is used.
> +        <span class="since">Since 1.1.0</span> If omitted, 0.10 is used.
> +        <span class="since">Since 1.1.2</span>

You could explicitly state that previously the qemu-img default was
used.

>        </dd>
>        <dt><code>nocow</code></dt>
>        <dd>Turn off COW of the newly created volume. So far, this is only valida


ACK,

Peter
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