Xen devel - Mar 2009 - [PATCH][RFC] Parameter name change for xc_*_build functions

[Purely a cosmetic change.]

It''s been pointed out that the "memory" parameter names in
tools/libxc/xenguest.h aren''t very consistent between linux and HVM,
and may confuse people setting up ballooning systems.  Ballooning
systems generally have a parameter like "static_max", which is the
maximum memory the VM will ever have, and "target" which is the memory
we want it to have right now (somewhere between dynamic_max and
dynamic_min).

The attached patch changes the parameter names to make them consistent
with what someone building such a system might use:
* When building a PV Linux VM, since we can expand the memory whenever
we wish, we pass in "start_mem_mb".  This corresponds to
"target".
* When building an HVM VM with xc_hvm_build(), since we cannot grow
larger than the initial amount of memory at boot, we pass in
"max_mem_mb".  This corresponds to "static_max".  The
balloon driver
can then be used after boot to balloon down to target.
* When building an HVM VM with xc_hvm_build_target_mem(), we pass both
parameters: "max_mem_mb" (which corresponds to "static_max")
and
"start_mem_mb" (which corresponds to target).

Thoughts?

 -George Dunlap


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