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authorIngo Molnar <mingo@kernel.org>2019-02-13 10:36:18 +0300
committerIngo Molnar <mingo@kernel.org>2019-02-13 10:36:18 +0300
commitcae45e1c6c541283a1bd155aa7b0a57e353b4df4 (patch)
treeba87fdd6b47cb2937fc1b6d69ef0595a08646556 /Documentation/admin-guide
parentaa0c38cf39de73bf7360a3da8f1707601261e518 (diff)
parente7ffb4eb9a6d89678e7f62461737899f88dab64e (diff)
downloadlinux-cae45e1c6c541283a1bd155aa7b0a57e353b4df4.tar.xz
Merge branch 'rcu-next' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcu
Pull the latest RCU tree from Paul E. McKenney: - Additional cleanups after RCU flavor consolidation - Grace-period forward-progress cleanups and improvements - Documentation updates - Miscellaneous fixes - spin_is_locked() conversions to lockdep - SPDX changes to RCU source and header files - SRCU updates - Torture-test updates, including nolibc updates and moving nolibc to tools/include Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'Documentation/admin-guide')
-rw-r--r--Documentation/admin-guide/kernel-parameters.txt32
1 files changed, 19 insertions, 13 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 858b6c0b9a15..28481510ad4e 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -3653,19 +3653,6 @@
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.
@@ -3677,6 +3664,20 @@
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
@@ -3720,6 +3721,11 @@
This wake_up() will be accompanied by a
WARN_ONCE() splat and an ftrace_dump().
+ rcutree.sysrq_rcu= [KNL]
+ Commandeer a sysrq key to dump out Tree RCU's
+ rcu_node tree with an eye towards determining
+ why a new grace period has not yet started.
+
rcuperf.gp_async= [KNL]
Measure performance of asynchronous
grace-period primitives such as call_rcu().