On 07/16/2014 03:05 PM, Jim Fehlig wrote:
> + b_info->video_memkb = def->videos[0]->vram ?
> + def->videos[0]->vram :
> + LIBXL_MEMKB_DEFAULT;
>
While testing this, I noticed that libvirt will set vram to 9216 if not
specified. E.g.
The 9216 default for qemu is absolutely stupid. No real hardware has a
limit of 9M (8M or 16M are more likely). Please feel free to not
perpetuate that stupidity into libxl.
With type='vga', libxl will then fail to start the domain
libxl: error: libxl_create.c:253:libxl__domain_build_info_setdefault:
videoram must be at least 16 MB for STDVGA on QEMU_XEN
This could be handled in libxlDomainDeviceDefPostParse(), where we can
check for sane vram values for the various VIR_DOMAIN_VIDEO_TYPE_*, or
set sane defaults if vram is not specified.
Sounds like for libxl, a sane default is 16M.
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library
http://libvirt.org