Show estimated available memory if this is provided by the
kernel. See [1] for the full story.
[1]: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=34e431b0ae398fc54ea69ff85ec700722c9da773
function old new delta
free_main 537 633 +96
parse_cached_kb 85 - -85
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(add/remove: 0/1 grow/shrink: 1/0 up/down: 96/-85) Total: 11 bytes
Signed-off-by: Guillermo Rodriguez <guille.rodriguez@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
c8e3922ad8