[Xen-devel] [PATCHv3 0/2] xen/privcmd: support for paged-out frames

[David Vrabel <david.vrabel@xxxxxxxxxx>]

This series is a straight forward-port of some functionality from
classic kernels to support Xen hosts that do paging of guests.

This isn't functionality the XenServer makes use of so I've not tested
these with paging in use.

Changes since v2:

- Better docs/comments,
- Return -ENOENT if any frame failed with -ENOENT (even if other
  frames fail for other reasons).

Changes since v1:

- Don't change PRIVCMD_MMAPBATCH (except to #define a constant for the
  error).  It's broken and not really fixable sensibly and libxc will
  use V2 if it is available.
- Return -ENOENT if all failures were -ENOENT.
- Clear arg->err on success (libxc expected this).

I think this should probably get a "Tested-by" Andres or someone else
who uses paging before being applied.

David


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