ioctl-STOP_ARRAY

/ # mdadm --stop /dev/md100
[   45.075293] md100: detected capacity change from 104726528 to 0
[   45.076719] md: md100 stopped.
[   45.077463] md: unbind<vdc>
[   45.091792] md: export_rdev(vdb)
[   45.092595] md: unbind<vdb>
[   45.103687] md: export_rdev(vda)
mdadm: stopped /dev/md100

do_md_stop

• md_unregister_thread(&mddev->thread)
  • stop md100_raid1 thread
• pers->free(mddev, mddev->private)
  • == raid1_free
  • free conf object stored in mddev->private
• set_capacity(disk, 0)
  • set size of gendisk to 0
• export_array(mddev)
  • md_kick_rdev_from_array(rdev)
    • unbind_rdev_from_array(rdev)
      • print "md: unbind"
    • export_rdev
      • print "md: export_rdev(vda)"
      • kboject_put(&rdev->kobj)
        • rdev->kobj is initialized by kobject_init(&rdev->kobj, &rdev_ktype)
        • kdev_ktype.release = rdev_free
        • kobj_release call kdev_ktype.release and rdev is freed by rdev_free
  • mddev->raid_disks = 0
• md_clean(mddev)
  • remove all information in mddev object
• KOBJ_CHANGE uevent