From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: linux-kernel@vger.kernel.org
Cc: mingo@kernel.org, laijs@cn.fujitsu.com, dipankar@in.ibm.com,
akpm@linux-foundation.org, mathieu.desnoyers@efficios.com,
josh@joshtriplett.org, niv@us.ibm.com, tglx@linutronix.de,
peterz@infradead.org, rostedt@goodmis.org, dhowells@redhat.com,
edumazet@google.com, darren@dvhart.com, fweisbec@gmail.com,
sbw@mit.edu
Subject: [PATCH RFC tip/core/rcu 0/3] RT latency optimizations
Date: Mon, 18 Nov 2013 14:02:20 -0800 [thread overview]
Message-ID: <20131118220220.GA23353@linux.vnet.ibm.com> (raw)
Hello!
This series provides some minor latency optimizations for kernels that
build with CONFIG_RCU_NOCB_CPU_ALL=y:
1. Create a static inline implementation of rcu_is_nocb_cpu() that
unconditionally returns true when CONFIG_RCU_NOCB_CPU_ALL=y.
2. Create a static inline implementation of rcu_needs_cpu() that
unconditionally returns false when CONFIG_RCU_NOCB_CPU_ALL=y.
3. Create static inline implementations of rcu_prepare_for_idle()
and rcu_cleanup_after_idle() that are no-ops when
CONFIG_RCU_NOCB_CPU_ALL=y.
Thanx, Paul
------------------------------------------------------------------------
b/include/linux/rcupdate.h | 13 +++++++++++++
b/include/linux/rcutiny.h | 6 ------
b/include/linux/rcutree.h | 2 ++
b/kernel/rcu/tree.c | 2 +-
b/kernel/rcu/tree_plugin.h | 13 +++++++++++--
5 files changed, 27 insertions(+), 9 deletions(-)
next reply other threads:[~2013-11-18 22:02 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-18 22:02 Paul E. McKenney [this message]
2013-11-18 22:02 ` [PATCH tip/core/rcu 1/3] rcu: Optimize rcu_is_nocb_cpu() for RCU_NOCB_CPU_ALL Paul E. McKenney
2013-11-18 22:02 ` [PATCH tip/core/rcu 2/3] rcu: Optimize rcu_needs_cpu() " Paul E. McKenney
2013-11-18 22:02 ` [PATCH tip/core/rcu 3/3] Optimize RCU_FAST_NO_HZ " Paul E. McKenney
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