FM / parameters

/sys/module/haltpoll/parameters

Name	Size	Mode	Actions
guest_halt_poll_allow_shrink	4096	0644	edit dl rm
guest_halt_poll_grow	4096	0644	edit dl rm
guest_halt_poll_grow_start	4096	0644	edit dl rm
guest_halt_poll_ns	4096	0644	edit dl rm
guest_halt_poll_shrink	4096	0644	edit dl rm

Edit: /sys/module/haltpoll/parameters/guest_halt_poll_shrink (4096B)

cmd: