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Re: [libvirt] [PATCH v3 2/6] video: cleanup usage of vram attribute and update documentation



On 11/24/14 12:07, Pavel Hrdina wrote:
> The vram attribute was introduced to set the video memory but it is
> usable only for few hypervisors excluding QEMU/KVM and the old XEN
> driver. Only in case of QEMU the vram was used for QXL.
> 
> This patch updates the documentation to reflect current code in libvirt
> and also changes the cases when we will set the default vram attribute.
> It also fixes existing strange default value for VGA devices 9MB to 16MB
> because the video ram should be rounded to power of two.

Indeed. Except for QXL we don't pass the value to qemu or others ...

> 
> The change of default value could affect migrations but I found out that
> QEMU always round the video ram to power of two internally so it's safe
> to change the default value to the next closest power of two and also
> silently correct every domain XML definition. And it's also safe because
> we don't pass the value to QEMU.
> 
> Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1076098
> 
> Signed-off-by: Pavel Hrdina <phrdina redhat com>
> ---
>  docs/formatdomain.html.in                          | 66 ++++++++++++++--------
>  src/conf/domain_conf.c                             | 15 +++--
>  src/conf/domain_conf.h                             |  3 +-
>  src/qemu/qemu_command.c                            | 16 ++++--
>  src/xen/xen_driver.c                               |  2 +-

...

>  tests/qemuxml2xmloutdata/qemuxml2xmlout-q35.xml    |  2 +-
>  tests/virt-aa-helper-test                          |  2 +-
>  43 files changed, 103 insertions(+), 75 deletions(-)
> 

ACK.

Peter


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