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From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: linux-kernel@vger.kernel.org
Cc: mingo@kernel.org, jiangshanlai@gmail.com, dipankar@in.ibm.com,
	akpm@linux-foundation.org, mathieu.desnoyers@efficios.com,
	josh@joshtriplett.org, tglx@linutronix.de, peterz@infradead.org,
	rostedt@goodmis.org, dhowells@redhat.com, edumazet@google.com,
	fweisbec@gmail.com, oleg@redhat.com, joel@joelfernandes.org,
	"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Subject: [PATCH tip/core/rcu 13/24] rcu: Clean up flavor-related definitions and comments in Kconfig
Date: Wed, 29 Aug 2018 15:53:54 -0700	[thread overview]
Message-ID: <20180829225405.7275-13-paulmck@linux.vnet.ibm.com> (raw)
In-Reply-To: <20180829225340.GA7019@linux.vnet.ibm.com>

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
---
 kernel/rcu/Kconfig | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/kernel/rcu/Kconfig b/kernel/rcu/Kconfig
index a0b7f0103ca9..939a2056c87a 100644
--- a/kernel/rcu/Kconfig
+++ b/kernel/rcu/Kconfig
@@ -196,7 +196,7 @@ config RCU_BOOST
 	  This option boosts the priority of preempted RCU readers that
 	  block the current preemptible RCU grace period for too long.
 	  This option also prevents heavy loads from blocking RCU
-	  callback invocation for all flavors of RCU.
+	  callback invocation.
 
 	  Say Y here if you are working with real-time apps or heavy loads
 	  Say N here if you are unsure.
@@ -225,15 +225,15 @@ config RCU_NOCB_CPU
 	  callback invocation to energy-efficient CPUs in battery-powered
 	  asymmetric multiprocessors.
 
-	  This option offloads callback invocation from the set of
-	  CPUs specified at boot time by the rcu_nocbs parameter.
-	  For each such CPU, a kthread ("rcuox/N") will be created to
-	  invoke callbacks, where the "N" is the CPU being offloaded,
-	  and where the "p" for RCU-preempt and "s" for RCU-sched.
-	  Nothing prevents this kthread from running on the specified
-	  CPUs, but (1) the kthreads may be preempted between each
-	  callback, and (2) affinity or cgroups can be used to force
-	  the kthreads to run on whatever set of CPUs is desired.
+	  This option offloads callback invocation from the set of CPUs
+	  specified at boot time by the rcu_nocbs parameter.  For each
+	  such CPU, a kthread ("rcuox/N") will be created to invoke
+	  callbacks, where the "N" is the CPU being offloaded, and where
+	  the "p" for RCU-preempt (PREEMPT kernels) and "s" for RCU-sched
+	  (!PREEMPT kernels).  Nothing prevents this kthread from running
+	  on the specified CPUs, but (1) the kthreads may be preempted
+	  between each callback, and (2) affinity or cgroups can be used
+	  to force the kthreads to run on whatever set of CPUs is desired.
 
 	  Say Y here if you want to help to debug reduced OS jitter.
 	  Say N here if you are unsure.
-- 
2.17.1


  parent reply	other threads:[~2018-08-29 22:55 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-08-29 22:53 [PATCH tip/core/rcu 0/24] Additional RCU-consolidation cleanups for v4.20/v5.0 Paul E. McKenney
2018-08-29 22:53 ` [PATCH tip/core/rcu 01/24] rcu: Inline increment_cpu_stall_ticks() into its sole caller Paul E. McKenney
2018-08-29 22:53 ` [PATCH tip/core/rcu 02/24] rcu: Pull rcu_gp_kthread() FQS loop into separate function Paul E. McKenney
2018-08-29 22:53 ` [PATCH tip/core/rcu 03/24] rcu: Consolidate RCU-bh update-side function definitions Paul E. McKenney
2018-08-29 22:53 ` [PATCH tip/core/rcu 04/24] rcu: Consolidate RCU-sched " Paul E. McKenney
2018-08-29 22:53 ` [PATCH tip/core/rcu 05/24] rcutorture: Add RCU-bh and RCU-sched support for extended readers Paul E. McKenney
2018-08-29 22:53 ` [PATCH tip/core/rcu 06/24] rcu: Stop testing RCU-bh and RCU-sched Paul E. McKenney
2018-08-29 22:53 ` [PATCH tip/core/rcu 07/24] rcutorture: Remove the "rcu_bh" and "sched" torture types Paul E. McKenney
2018-08-29 22:53 ` [PATCH tip/core/rcu 08/24] rcuperf: " Paul E. McKenney
2018-08-29 22:53 ` [PATCH tip/core/rcu 09/24] rcu: Remove now-unused rcutorture APIs Paul E. McKenney
2018-08-29 22:53 ` [PATCH tip/core/rcu 10/24] rcu: Clean up flavor-related definitions and comments in rcupdate.h Paul E. McKenney
2018-08-29 22:53 ` [PATCH tip/core/rcu 11/24] rcu: Clean up flavor-related definitions and comments in rculist.h Paul E. McKenney
2018-08-29 22:53 ` [PATCH tip/core/rcu 12/24] rcu: Clean up flavor-related definitions and comments in rcupdate_wait.h Paul E. McKenney
2018-08-29 22:53 ` Paul E. McKenney [this message]
2018-08-29 22:53 ` [PATCH tip/core/rcu 14/24] rcu: Clean up flavor-related definitions and comments in rcu.h Paul E. McKenney
2018-08-29 22:53 ` [PATCH tip/core/rcu 15/24] rcu: Clean up flavor-related definitions and comments in rcutorture.c Paul E. McKenney
2018-08-29 22:53 ` [PATCH tip/core/rcu 16/24] rcu: Clean up flavor-related definitions and comments in srcutree.h Paul E. McKenney
2018-08-29 22:53 ` [PATCH tip/core/rcu 17/24] rcu: Clean up flavor-related definitions and comments in tiny.c Paul E. McKenney
2018-08-29 22:53 ` [PATCH tip/core/rcu 18/24] rcu: Clean up flavor-related definitions and comments in tree.c Paul E. McKenney
2018-08-29 22:54 ` [PATCH tip/core/rcu 19/24] rcu: Clean up flavor-related definitions and comments in tree_exp.h Paul E. McKenney
2018-08-29 22:54 ` [PATCH tip/core/rcu 20/24] rcu: Clean up flavor-related definitions and comments in tree_plugin.h Paul E. McKenney
2018-08-29 22:54 ` [PATCH tip/core/rcu 21/24] rcu: Clean up flavor-related definitions and comments in update.c Paul E. McKenney
2018-08-29 22:54 ` [PATCH tip/core/rcu 22/24] rcu: Remove !PREEMPT code from rcu_note_voluntary_context_switch() Paul E. McKenney
2018-08-29 22:54 ` [PATCH tip/core/rcu 23/24] rcu: Define rcu_all_qs() only in !PREEMPT builds Paul E. McKenney
2018-08-29 22:54 ` [PATCH tip/core/rcu 24/24] rcu: Inline _rcu_barrier() into its sole remaining caller Paul E. McKenney

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