From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: linux-kernel@vger.kernel.org
Cc: mingo@elte.hu, 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,
Valdis.Kletnieks@vt.edu, dhowells@redhat.com,
eric.dumazet@gmail.com, darren@dvhart.com, fweisbec@gmail.com,
patches@linaro.org
Subject: [PATCH RFC tip/core/rcu 0/4] Updates to RCU_FAST_NO_HZ
Date: Mon, 23 Apr 2012 09:15:39 -0700 [thread overview]
Message-ID: <20120423161539.GA6467@linux.vnet.ibm.com> (raw)
Hello!
This series covers enhancements to RCU_FAST_NO_HZ intended for v3.4-rc2.
The individual commits are as follows:
1. Add tracing to rcu_cleanup_after_idle().
2. Switch from hrtimer to normal timers to reduce overhead.
3. Upgrade RCU_FAST_NO_HZ state machine to better account for
brief pauses out of idle, which can happen due to power-management
actions, Steven Rostedt's new RCU-idle-capable tracing macros,
or my RCU_NONIDLE() macro.
4. Use add_timer_on() to avoid timer migration.
Thanx, Paul
b/include/trace/events/rcu.h | 1
b/kernel/rcutree.c | 2
b/kernel/rcutree.h | 1
b/kernel/rcutree_plugin.h | 1
kernel/rcutree_plugin.h | 112 ++++++++++++++++++++++++++++---------------
5 files changed, 80 insertions(+), 37 deletions(-)
next reply other threads:[~2012-04-23 16:16 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-23 16:15 Paul E. McKenney [this message]
2012-04-23 16:15 ` [PATCH RFC tip/core/rcu 1/4] rcu: Add RCU_FAST_NO_HZ tracing for idle exit Paul E. McKenney
2012-04-23 16:15 ` [PATCH RFC tip/core/rcu 2/4] rcu: Make RCU_FAST_NO_HZ use timer rather than hrtimer Paul E. McKenney
2012-04-23 16:16 ` [PATCH RFC tip/core/rcu 3/4] rcu: Make RCU_FAST_NO_HZ account for pauses out of idle Paul E. McKenney
2012-04-26 13:00 ` Peter Zijlstra
2012-04-26 14:49 ` Paul E. McKenney
2012-04-26 15:09 ` Peter Zijlstra
2012-04-23 16:16 ` [PATCH RFC tip/core/rcu 4/4] rcu: Ensure that RCU_FAST_NO_HZ timers expire on correct CPU Paul E. McKenney
2012-04-26 13:04 ` Peter Zijlstra
2012-04-26 15:54 ` Paul E. McKenney
2012-04-26 16:08 ` Steven Rostedt
2012-04-26 17:56 ` Paul E. McKenney
2012-04-26 18:10 ` [PATCH] timer: Fix mod_timer_pinned() header commen (was: [PATCH RFC tip/core/rcu 4/4] rcu: Ensure that RCU_FAST_NO_HZ timers expire on correct CPU) Steven Rostedt
2012-04-26 18:36 ` Paul E. McKenney
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