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Commit 1a4762b9 authored by Paul E. McKenney's avatar Paul E. McKenney
Browse files

doc: Now jiffies_till_sched_qs solicits help from cond_resched() 



The rcutree.jiffies_till_sched_qs kernel boot parameter used to solicit
help only from rcu_note_context_switch(), but now also solicits help
from cond_resched().  This commit therefore updates kernel-parameters.txt
accordingly.

Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.ibm.com>
parent 7a968bb2

Documentation/admin-guide/kernel-parameters.txt

+14 −13
Original line number Diff line number Diff line
@@ -3654,19 +3654,6 @@ 
			latencies, which will choose a value aligned

			with the appropriate hardware boundaries.



	rcutree.jiffies_till_sched_qs= [KNL]

			Set required age in jiffies for a

			given grace period before RCU starts

			soliciting quiescent-state help from

			rcu_note_context_switch().  If not specified, the

			kernel will calculate a value based on the most

			recent settings of rcutree.jiffies_till_first_fqs

			and rcutree.jiffies_till_next_fqs.

			This calculated value may be viewed in

			rcutree.jiffies_to_sched_qs.  Any attempt to

			set rcutree.jiffies_to_sched_qs will be

			cheerfully overwritten.



	rcutree.jiffies_till_first_fqs= [KNL]

			Set delay from grace-period initialization to

			first attempt to force quiescent states.
@@ -3678,6 +3665,20 @@ 
			quiescent states.  Units are jiffies, minimum

			value is one, and maximum value is HZ.



	rcutree.jiffies_till_sched_qs= [KNL]

			Set required age in jiffies for a

			given grace period before RCU starts

			soliciting quiescent-state help from

			rcu_note_context_switch() and cond_resched().

			If not specified, the kernel will calculate

			a value based on the most recent settings

			of rcutree.jiffies_till_first_fqs

			and rcutree.jiffies_till_next_fqs.

			This calculated value may be viewed in

			rcutree.jiffies_to_sched_qs.  Any attempt to set

			rcutree.jiffies_to_sched_qs will be cheerfully

			overwritten.



	rcutree.kthread_prio= 	 [KNL,BOOT]

			Set the SCHED_FIFO priority of the RCU per-CPU

			kthreads (rcuc/N). This value is also used for