How to track list of processes that are swapped in from swap devices ?

Issue

• How to track list of processes that are swapped in from swap devices ?

• System reported 56 Kbytes memory swapped in from disk, how to find responsible processes ?

[root@localhost ~]# vmstat 1
procs -----------memory---------- ---swap-- -----io---- -system-- ------cpu-----
 r  b   swpd   free   buff  cache   si   so    bi    bo   in   cs us sy id wa st
 0  0 416772 3321284      0 202032    0    0     0     0  105  171  0  0 100  0  0
 0  0 416772 3321284      0 202032    0    0     0     0  105  170  0  0 100  0  0
 1  0 416752 3321024      0 202060   56    0    84     0 3816 3446  1  8 90  0  0
 0  0 416752 3321024      0 202060    0    0     0     0  108  169  0  0 100  0  0
 0  0 416752 3321024      0 202060    0    0     0     0   93  147  0  0 100  0  0