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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20120426202940.GL2407@linux.vnet.ibm.com \
--to=paulmck@linux.vnet.ibm.com \
--cc=Valdis.Kletnieks@vt.edu \
--cc=akpm@linux-foundation.org \
--cc=darren@dvhart.com \
--cc=dhowells@redhat.com \
--cc=dipankar@in.ibm.com \
--cc=eric.dumazet@gmail.com \
--cc=fweisbec@gmail.com \
--cc=josh@joshtriplett.org \
--cc=laijs@cn.fujitsu.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mathieu.desnoyers@polymtl.ca \
--cc=mingo@elte.hu \
--cc=niv@us.ibm.com \
--cc=patches@linaro.org \
--cc=peterz@infradead.org \
--cc=rostedt@goodmis.org \
--cc=tglx@linutronix.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.