Commit-ID: 1a4762b9272f513aa4c7d8abe7a7529540f95e2d Gitweb: https://git.kernel.org/tip/1a4762b9272f513aa4c7d8abe7a7529540f95e2d Author: Paul E. McKenney <paulmck@xxxxxxxxxxxxx> AuthorDate: Tue, 20 Nov 2018 10:22:00 -0800 Committer: Paul E. McKenney <paulmck@xxxxxxxxxxxxx> CommitDate: Fri, 25 Jan 2019 15:34:17 -0800 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@xxxxxxxxxxxxx> --- Documentation/admin-guide/kernel-parameters.txt | 27 +++++++++++++------------ 1 file 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
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