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authorPaul E. McKenney <paulmck@linux.ibm.com>2018-11-20 10:22:00 -0800
committerPaul E. McKenney <paulmck@linux.ibm.com>2019-01-25 15:34:17 -0800
commit1a4762b9272f513aa4c7d8abe7a7529540f95e2d (patch)
tree93910cea8ec6e235fb557f5f70ea2cb53eac82da /Documentation/admin-guide
parent7a968bb26a9b09b6e44c48a8036a73e0bc497dbc (diff)
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: Paul E. McKenney <paulmck@linux.ibm.com>
Diffstat (limited to 'Documentation/admin-guide')
-rw-r--r--Documentation/admin-guide/kernel-parameters.txt27
1 files changed, 14 insertions, 13 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index b0dbb2fa401f..bec49d593583 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -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