Commit 809ba69f authored by SeongJae Park's avatar SeongJae Park Committed by Andrew Morton
Browse files

selftests/damon/sysfs: add obsolete_target test 

A new DAMON sysfs file for pin-point target removal, namely
obsolete_target, has been added.  Add a test for the functionality.  It
starts DAMON with three monitoring target processes, mark one in the
middle as obsolete, commit it, and confirm the internal DAMON status is
updated to remove the target in the middle.

Link: https://lkml.kernel.org/r/20251023012535.69625-10-sj@kernel.org


Signed-off-by: default avatarSeongJae Park <sj@kernel.org>
Cc: Bijan Tabatabai <bijan311@gmail.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 65a9033d

tools/testing/selftests/damon/sysfs.py

+37 −0
Original line number Diff line number Diff line
@@ -279,5 +279,42 @@ def main(): 


    kdamonds.stop()



    # test obsolete_target.

    proc1 = subprocess.Popen(['sh'], stdout=subprocess.PIPE,

                             stderr=subprocess.PIPE)

    proc2 = subprocess.Popen(['sh'], stdout=subprocess.PIPE,

                             stderr=subprocess.PIPE)

    proc3 = subprocess.Popen(['sh'], stdout=subprocess.PIPE,

                             stderr=subprocess.PIPE)

    kdamonds = _damon_sysfs.Kdamonds(

            [_damon_sysfs.Kdamond(

                contexts=[_damon_sysfs.DamonCtx(

                    ops='vaddr',

                    targets=[

                        _damon_sysfs.DamonTarget(pid=proc1.pid),

                        _damon_sysfs.DamonTarget(pid=proc2.pid),

                        _damon_sysfs.DamonTarget(pid=proc3.pid),

                        ],

                    schemes=[_damon_sysfs.Damos()],

                    )])])

    err = kdamonds.start()

    if err is not None:

        print('kdamond start failed: %s' % err)

        exit(1)

    kdamonds.kdamonds[0].contexts[0].targets[1].obsolete = True

    kdamonds.kdamonds[0].commit()



    status, err = dump_damon_status_dict(kdamonds.kdamonds[0].pid)

    if err is not None:

        print(err)

        kdamonds.stop()

        exit(1)



    del kdamonds.kdamonds[0].contexts[0].targets[1]



    assert_ctxs_committed(kdamonds.kdamonds[0].contexts, status['contexts'])



    kdamonds.stop()



if __name__ == '__main__':

    main()