Ticket 48846 - 32 bit systems set low vmsize
    
    Bug Description:  32 bit systems set vmsize low, and it grows. We should use
    *not* use this for page available checks as it causes some errors.
    
    Fix Description:  Only uses pages from meminfo on a 32bit platform rather than
    vmsize.
    
    https://fedorahosted.org/389/ticket/48846
    
    Author: wibrown
    
    Review by: nhosoi (Thanks!)