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, dvhart@linux.intel.com, fweisbec@gmail.com,
oleg@redhat.com, sbw@mit.edu, linux-rt-users@vger.kernel.org
Subject: [PATCH RFC tip/core/rcu 0/2] NOCB kthread economization patches
Date: Mon, 14 Jul 2014 03:06:04 -0700 [thread overview]
Message-ID: <20140714100604.GA9905@linux.vnet.ibm.com> (raw)
Hello!
This series provides a couple of patches that reduce the number of rcuo
kthreads in cases where nr_cpu_ids is larger than the actual number of
online CPUs.
1. Preparation patch that rationalizes RCU's creation of early-boot
kthreads.
2. Instead of creation rcuo kthreads for each possible CPU, create
them only for those CPUs that have come online at least once
since boot.
Thanx, Paul
------------------------------------------------------------------------
b/kernel/rcu/tree.c | 8 ++-
b/kernel/rcu/tree.h | 5 +-
b/kernel/rcu/tree_plugin.h | 105 ++++++++++++++++++++++++++++++++++++---------
3 files changed, 95 insertions(+), 23 deletions(-)
next reply other threads:[~2014-07-14 10:06 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-14 10:06 Paul E. McKenney [this message]
2014-07-14 10:06 ` [PATCH RFC tip/core/rcu 1/2] rcu: Rationalize kthread spawning Paul E. McKenney
2014-07-14 10:06 ` [PATCH RFC tip/core/rcu 2/2] rcu: Create rcuo kthreads only for onlined CPUs Paul E. McKenney
2014-07-14 16:48 ` Pranith Kumar
2014-07-16 12:02 ` Paul E. McKenney
2014-07-18 11:17 ` Sasha Levin
2014-07-18 12:55 ` Paul E. McKenney
2014-07-18 13:10 ` Sasha Levin
2014-07-17 2:57 ` [PATCH RFC tip/core/rcu 1/2] rcu: Rationalize kthread spawning Sasha Levin
2014-07-17 4:02 ` Pranith Kumar
2014-07-17 5:33 ` Paul E. McKenney
[not found] ` <53C7F37D.1060100@oracle.com>
2014-07-18 0:04 ` Paul E. McKenney
2014-07-14 11:21 ` [PATCH RFC tip/core/rcu 0/2] NOCB kthread economization patches Josh Triplett
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