Xen devel - Feb 2009 - Difference between xc_map_foreign_range() and xc_map_foreign_batch()

Hello All,
Could someone please enlighten me on the difference between
xc_map_foreign_range() and xc_map_foreign_batch() used in xc_save/restore.
 I know both of them function similar to mmap. I guess the
xc_map_foreign_range directly maps the range of addresses from DomU to
Dom0.

However I am not sure what xc_map_foreign_batch does. It always seems to be
used for mapping page frame lists.
 Can someone please tell me what is does and why it is used.

Thank you.

Aditya


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