On Fri, Nov 16, 2012 at 10:18 PM, Eric W. Biederman <ebiederm at xmission.com> wrote: > Yinghai Lu <yinghai at kernel.org> writes: > >> So could limit range for 4g above buffers. > > What is wrong with mem-min and mem-max? At this point in the patchset > it looks like you are introducing mem64-min and mem64-max as a hack to > avoid fixing mem-min and mem-max properly. if we set mem-min high, some buffers for purgatory and real_mode can not be allocated properly. mem64-min and mem64-max are used to limit range for buffer that could stay above 4g. like limit them one range belong to one node only.