#cat /proc/1918/smaps
[root@mon-bjds-bw-220-169 1918]# cat smaps 
002b7000-002c0000 r-xp 00000000 08:02 2875176    /lib/libnss_files-2.5.so
Size:                36 kB
Rss:                 20 kB
Shared_Clean:        20 kB
Shared_Dirty:         0 kB
Private_Clean:        0 kB
Private_Dirty:        0 kB
Swap:        0 kB
002c0000-002c1000 r-xp 00008000 08:02 2875176    /lib/libnss_files-2.5.so
Size:                 4 kB
Rss:                  4 kB
Shared_Clean:         0 kB
Shared_Dirty:         0 kB
Private_Clean:        0 kB
Private_Dirty:        4 kB
Swap:        0 kB
......