FM / parameters

/sys/module/rcutree/parameters

Name	Size	Mode	Actions
blimit	4096	0444	edit dl rm
dump_tree	4096	0444	edit dl rm
gp_cleanup_delay	4096	0444	edit dl rm
gp_init_delay	4096	0444	edit dl rm
gp_preinit_delay	4096	0444	edit dl rm
jiffies_till_first_fqs	4096	0644	edit dl rm
jiffies_till_next_fqs	4096	0644	edit dl rm
jiffies_till_sched_qs	4096	0444	edit dl rm
jiffies_to_sched_qs	4096	0444	edit dl rm
kthread_prio	4096	0444	edit dl rm
qhimark	4096	0444	edit dl rm
qlowmark	4096	0444	edit dl rm
qovld	4096	0444	edit dl rm
rcu_delay_page_cache_fill_msec	4096	0444	edit dl rm
rcu_divisor	4096	0644	edit dl rm
rcu_fanout_exact	4096	0444	edit dl rm
rcu_fanout_leaf	4096	0444	edit dl rm
rcu_kick_kthreads	4096	0644	edit dl rm
rcu_min_cached_objs	4096	0444	edit dl rm
rcu_resched_ns	4096	0644	edit dl rm
sysrq_rcu	4096	0444	edit dl rm
use_softirq	4096	0444	edit dl rm

Edit: /sys/module/rcutree/parameters/gp_preinit_delay (4096B)