Re: [Xen-devel] [PATCH] set pv guest default video_memkb to 0

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

On Tue, Nov 18, 2014 at 03:57:08PM -0500, Zhigang Wang wrote:
> Before this patch, pv guest video_memkb is -1, which is an invalid value.
> And it will cause the xenstore 'memory/targe' calculation wrong:
> 
>     memory/target = info->target_memkb - info->video_memkb

CC-ing the maintainers.

Is this an regression as compared to Xen 4.4 or is this also in Xen 4.4?

Thanks.

> 
> Signed-off-by: Zhigang Wang <zhigang.x.wang@xxxxxxxxxx>
> ---
>  tools/libxl/libxl_create.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/tools/libxl/libxl_create.c b/tools/libxl/libxl_create.c
> index b1ff5ae..1198225 100644
> --- a/tools/libxl/libxl_create.c
> +++ b/tools/libxl/libxl_create.c
> @@ -357,6 +357,8 @@ int libxl__domain_build_info_setdefault(libxl__gc *gc,
>          break;
>      case LIBXL_DOMAIN_TYPE_PV:
>          libxl_defbool_setdefault(&b_info->u.pv.e820_host, false);
> +        if (b_info->video_memkb == LIBXL_MEMKB_DEFAULT)
> +            b_info->video_memkb = 0;
>          if (b_info->shadow_memkb == LIBXL_MEMKB_DEFAULT)
>              b_info->shadow_memkb = 0;
>          if (b_info->u.pv.slack_memkb == LIBXL_MEMKB_DEFAULT)
> -- 
> 1.8.3.1
> 
> 
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