Re: [PATCH 0/5] libxc: support building large pv-domains

[Juergen Gross <jgross@suse.com>]

Hi tools maintainers,

On 09/11/2015 02:32 PM, Juergen Gross wrote:
> The Xen hypervisor supports starting a dom0 with large memory (up to
> the TB range) by not including the initrd and p2m list in the initial
> kernel mapping. Especially the p2m list can grow larger than the
> available virtual space in the initial mapping.
>
> The started kernel is indicating the support of each feature via
> elf notes.
>
> This series enables the domain builder in libxc to do the same as the
> hypervisor. This enables starting of huge pv-domUs via xl.
>
> Unmapped initrd is supported for 64 and 32 bit domains, omitting the
> p2m from initial kernel mapping is possible for 64 bit domains only.
>
> Tested with:
> - 32 bit domU (kernel not supporting unmapped initrd)
> - 32 bit domU (kernel supporting unmapped initrd)
> - 1 GB 64 bit domU (kernel supporting unmapped initrd, not p2m)
> - 1 GB 64 bit domU (kernel supporting unmapped initrd and p2m)
> - 900GB 64 bit domU (kernel supporting unmapped initrd and p2m)
>
> Juergen Gross (5):
>    libxc: remove allocate member from struct xc_dom_image
>    libxc: do initrd processing of domain builder in own function
>    libxc: create unmapped initrd in domain builder if supported
>    libxc: split p2m allocation in domain builder from other magic pages
>    libxc: create p2m list outside of kernel mapping if supported
>
>   tools/libxc/include/xc_dom.h |   4 +-
>   tools/libxc/xc_dom_core.c    | 123 +++++++++++++++++++++++++++++--------------
>   tools/libxc/xc_dom_x86.c     | 120 ++++++++++++++++++++++++++++++++++++++++-
>   3 files changed, 204 insertions(+), 43 deletions(-)
>

Patches 1+2 got Acked-by IanJ, what about the other 3 patches?


Juergen