From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: linux-kernel@vger.kernel.org, mingo@elte.hu,
laijs@cn.fujitsu.com, dipankar@in.ibm.com,
akpm@linux-foundation.org, mathieu.desnoyers@polymtl.ca,
josh@joshtriplett.org, niv@us.ibm.com, tglx@linutronix.de,
rostedt@goodmis.org, Valdis.Kletnieks@vt.edu,
dhowells@redhat.com, eric.dumazet@gmail.com, darren@dvhart.com,
fweisbec@gmail.com, patches@linaro.org
Subject: Re: [PATCH RFC tip/core/rcu 6/6] rcu: Reduce cache-miss initialization latencies for large systems
Date: Thu, 26 Apr 2012 13:29:40 -0700 [thread overview]
Message-ID: <20120426202940.GL2407@linux.vnet.ibm.com> (raw)
In-Reply-To: <1335469664.2463.98.camel@laptop>
On Thu, Apr 26, 2012 at 09:47:44PM +0200, Peter Zijlstra wrote:
> On Thu, 2012-04-26 at 21:41 +0200, Peter Zijlstra wrote:
> >
> > I can very easily give you the size (nr cpus in) a node, still as long
> > as you iterate the cpu space linearly that's not going to be much
> > help.
> >
> Oh, I forgot, the numa masks etc are available, depending on
> CONFIG_NUMA, as cpumask_of_node(n).
These change with each CPU-hotplug operation? Or is a given CPU
hotplug operation guaranteed to change only those node masks that
the CPU was (or will be, in the case of online) a member?
Thanx, Paul
next prev parent reply other threads:[~2012-04-26 20:29 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-23 16:41 [PATCH RFC 0/6] Miscellaneous RCU fixes for 3.5 Paul E. McKenney
2012-04-23 16:42 ` [PATCH RFC tip/core/rcu 1/6] rcu: Stabilize use of num_online_cpus() for GP short circuit Paul E. McKenney
2012-04-23 16:42 ` [PATCH RFC tip/core/rcu 2/6] rcu: List-debug variants of rcu list routines Paul E. McKenney
2012-04-23 16:42 ` [PATCH RFC tip/core/rcu 3/6] rcu: Replace list_first_entry_rcu() with list_first_or_null_rcu() Paul E. McKenney
2012-04-23 16:42 ` [PATCH RFC tip/core/rcu 4/6] rcu: Clarify help text for RCU_BOOST_PRIO Paul E. McKenney
2012-04-26 12:46 ` Peter Zijlstra
2012-04-26 17:28 ` Paul E. McKenney
2012-04-23 16:42 ` [PATCH RFC tip/core/rcu 5/6] rcu: Make __kfree_rcu() less dependent on compiler choices Paul E. McKenney
2012-04-26 12:48 ` Peter Zijlstra
2012-04-26 13:29 ` Jan Engelhardt
2012-04-26 13:50 ` Peter Zijlstra
2012-04-23 16:42 ` [PATCH RFC tip/core/rcu 6/6] rcu: Reduce cache-miss initialization latencies for large systems Paul E. McKenney
2012-04-26 12:51 ` Peter Zijlstra
2012-04-26 14:12 ` Paul E. McKenney
2012-04-26 15:28 ` Peter Zijlstra
2012-04-26 16:15 ` Paul E. McKenney
2012-04-26 19:41 ` Peter Zijlstra
2012-04-26 19:47 ` Peter Zijlstra
2012-04-26 20:29 ` Paul E. McKenney [this message]
2012-04-26 22:04 ` Peter Zijlstra
2012-04-26 20:28 ` Paul E. McKenney
2012-04-26 22:01 ` Peter Zijlstra
2012-04-27 14:17 ` Paul E. McKenney
2012-04-27 4:36 ` Mike Galbraith
2012-04-27 15:15 ` Paul E. McKenney
2012-04-28 4:42 ` Mike Galbraith
2012-04-28 17:21 ` Paul E. McKenney
2012-04-29 3:54 ` Mike Galbraith
2012-04-24 15:35 ` [PATCH RFC tip/core/rcu 1/6] rcu: Stabilize use of num_online_cpus() for GP short circuit Srivatsa S. Bhat
2012-04-24 16:50 ` Paul E. McKenney
2012-04-24 17:46 ` Srivatsa S. Bhat
2012-05-07 3:47 ` Rusty Russell
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