On multi-node ia64 system, SysRq-M seems to dump wrong memory info.
(Since I don't have such a large machine, I don't confirm it)
It should reset counters every iteration each node in show_mem().
Jesse Barnes: "This looks good".
Signed-off-by: Akinobu Mita <mita@yacht.ocn.ne.jp>
Signed-off-by: Tony Luck <tony.luck@intel.com>