c437faf8d3
Let's not report zero for kb_main_available when older kernels don't have MemAvailable. Instead, if we simply duplicate the 'free' amount we can avoid all ancillary problems, such as those involving top's graphing mode. Reference(s): http://www.freelists.org/post/procps/kb-main-available-etc,3 Signed-off-by: Jim Warner <james.warner@comcast.net>