NAME
  ksm - kernel samepage merging (KSM) information

SYNOPSIS
  ksm [-v] [[-p] address ...]

DESCRIPTION
  This command displays information about all KSM pages currently
  in use.  For each KSM page, the display includes its stable_node
  address, its page struct address, its physical address, the TGID/PID
  for each task that is using the page, the number of mappings in the
  task's address space for the page, and the mm_struct address of the
  task. If pid is '-', the task has exited and the ksm page has not
  been removed.
 
       -v  also dump each virtual address in a PID's virtual address
           space that maps the KSM page.
  address  restricts the output to the KSM data associated with a
           stable_node address, a page's physical address, or a page
           pointer.
       -p  specifies that the address argument is a physical address,
           for architectures that require it.

EXAMPLE
  Display information about all KSM pages:

    crash> ksm
                PAGE: ffffea000451f180
         STABLE_NODE: ffff88004866b6c0
    PHYSICAL ADDRESS: 1147c6000
                 PID: 1318  MAPPINGS: 7707  MM: ffff88007f8abe80
                 PID: 1297  MAPPINGS: 4965  MM: ffff88007f8aa580

                PAGE: ffffea0003413c40
         STABLE_NODE: ffff880117bfbfc0
    PHYSICAL ADDRESS: d04f1000
                 PID: 1297  MAPPINGS: 1  MM: ffff88007f8aa580
                 PID: 1318  MAPPINGS: 1  MM: ffff88007f8abe80

                PAGE: ffffea00021e9880
         STABLE_NODE: ffff880054ee1f30
    PHYSICAL ADDRESS: 87a62000
                 PID: 1297  MAPPINGS: 2  MM: ffff88007f8aa580
    ...

  Display all information about the KSM page whose physical
  address is 0xffffea000168cd00:

    crash> ksm -v ffffea000168cd00
                PAGE: ffffea000168cd00
         STABLE_NODE: ffff88007153ce10
    PHYSICAL ADDRESS: 5a334000
                 PID: 1297  MAPPINGS: 4  MM: ffff88007f8aa580
                 VIRTUAL:
                 7f8cb91f9000
                 7f8cb8f28000
                 7f8cb7abf000
                 7f8cb79c7000

                 PID: 1318  MAPPINGS: 4  MM: ffff88007f8abe80
                 VIRTUAL:
                 7f7ca0703000
                 7f7c9f15e000
                 7f7c9ef8f000
                 7f7c9e96b000