From: "Paul E. McKenney" <paulmck@linux.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.ibm.com>
Subject: [PATCH tip/core/rcu 8/8] time: Move CONTEXT_TRACKING to kernel/time/Kconfig
Date: Wed, 9 Jan 2019 13:41:42 -0800 [thread overview]
Message-ID: <20190109214142.4428-8-paulmck@linux.ibm.com> (raw)
In-Reply-To: <20190109214115.GA2835@linux.ibm.com>
Both CONTEXT_TRACKING and CONTEXT_TRACKING_FORCE are currently defined
in kernel/rcu/kconfig, which might have made sense at some point, but
no longer does given that RCU refers to neither of these Kconfig options.
This commit therefore moves them to kernel/time/Kconfig, where the rest
of the NO_HZ_FULL Kconfig options live.
Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
---
kernel/rcu/Kconfig | 30 ------------------------------
kernel/time/Kconfig | 29 +++++++++++++++++++++++++++++
2 files changed, 29 insertions(+), 30 deletions(-)
diff --git a/kernel/rcu/Kconfig b/kernel/rcu/Kconfig
index 939a2056c87a..37301430970e 100644
--- a/kernel/rcu/Kconfig
+++ b/kernel/rcu/Kconfig
@@ -87,36 +87,6 @@ config RCU_STALL_COMMON
config RCU_NEED_SEGCBLIST
def_bool ( TREE_RCU || PREEMPT_RCU || TREE_SRCU )
-config CONTEXT_TRACKING
- bool
-
-config CONTEXT_TRACKING_FORCE
- bool "Force context tracking"
- depends on CONTEXT_TRACKING
- default y if !NO_HZ_FULL
- help
- The major pre-requirement for full dynticks to work is to
- support the context tracking subsystem. But there are also
- other dependencies to provide in order to make the full
- dynticks working.
-
- This option stands for testing when an arch implements the
- context tracking backend but doesn't yet fullfill all the
- requirements to make the full dynticks feature working.
- Without the full dynticks, there is no way to test the support
- for context tracking and the subsystems that rely on it: RCU
- userspace extended quiescent state and tickless cputime
- accounting. This option copes with the absence of the full
- dynticks subsystem by forcing the context tracking on all
- CPUs in the system.
-
- Say Y only if you're working on the development of an
- architecture backend for the context tracking.
-
- Say N otherwise, this option brings an overhead that you
- don't want in production.
-
-
config RCU_FANOUT
int "Tree-based hierarchical RCU fanout value"
range 2 64 if 64BIT
diff --git a/kernel/time/Kconfig b/kernel/time/Kconfig
index 58b981f4bb5d..e2c038d6c13c 100644
--- a/kernel/time/Kconfig
+++ b/kernel/time/Kconfig
@@ -117,6 +117,35 @@ config NO_HZ_FULL
endchoice
+config CONTEXT_TRACKING
+ bool
+
+config CONTEXT_TRACKING_FORCE
+ bool "Force context tracking"
+ depends on CONTEXT_TRACKING
+ default y if !NO_HZ_FULL
+ help
+ The major pre-requirement for full dynticks to work is to
+ support the context tracking subsystem. But there are also
+ other dependencies to provide in order to make the full
+ dynticks working.
+
+ This option stands for testing when an arch implements the
+ context tracking backend but doesn't yet fullfill all the
+ requirements to make the full dynticks feature working.
+ Without the full dynticks, there is no way to test the support
+ for context tracking and the subsystems that rely on it: RCU
+ userspace extended quiescent state and tickless cputime
+ accounting. This option copes with the absence of the full
+ dynticks subsystem by forcing the context tracking on all
+ CPUs in the system.
+
+ Say Y only if you're working on the development of an
+ architecture backend for the context tracking.
+
+ Say N otherwise, this option brings an overhead that you
+ don't want in production.
+
config NO_HZ
bool "Old Idle dynticks config"
depends on !ARCH_USES_GETTIMEOFFSET && GENERIC_CLOCKEVENTS
--
2.17.1
prev parent reply other threads:[~2019-01-09 21:42 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-09 21:41 [PATCH tip/core/rcu 0/8] Miscellaneous fixes for v5.1 Paul E. McKenney
2019-01-09 21:41 ` [PATCH tip/core/rcu 1/8] rcu: Docbook for rcu_head_init() and rcu_head_after_call_rcu() Paul E. McKenney
2019-01-09 21:41 ` [PATCH tip/core/rcu 2/8] rcu: Rename rcu_check_callbacks() to rcu_sched_clock_irq() Paul E. McKenney
2019-01-09 21:41 ` [PATCH tip/core/rcu 3/8] rcu: Rename rcu_process_callbacks() to rcu_core() for Tree RCU Paul E. McKenney
2019-01-09 21:41 ` [PATCH tip/core/rcu 4/8] rcu: Remove preemption disabling from expedited CPU selection Paul E. McKenney
2019-01-09 21:41 ` [PATCH tip/core/rcu 5/8] rcu: Repair rcu_nmi_exit() docbook header Paul E. McKenney
2019-01-09 21:41 ` [PATCH tip/core/rcu 6/8] rcu: Fix obsolete DYNTICK_IRQ_NONIDLE comment Paul E. McKenney
2019-01-09 21:41 ` [PATCH tip/core/rcu 7/8] rcu: Add sparse check to rcu_assign_pointer() Paul E. McKenney
2019-01-09 21:41 ` Paul E. McKenney [this message]
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