From: Christoph Lameter <cl@linux-foundation.org>
To: paulmck@linux.vnet.ibm.com
Cc: Peter Zijlstra <peterz@infradead.org>,
Pekka Enberg <penberg@cs.helsinki.fi>,
Ingo Molnar <mingo@elte.hu>,
Jeremy Fitzhardinge <jeremy@goop.org>,
Nick Piggin <nickpiggin@yahoo.com.au>,
Andi Kleen <andi@firstfloor.org>,
"Pallipadi, Venkatesh" <venkatesh.pallipadi@intel.com>,
Suresh Siddha <suresh.b.siddha@intel.com>,
Jens Axboe <jens.axboe@oracle.com>,
Rusty Russell <rusty@rustcorp.com.au>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 2/2] smp_call_function: use rwlocks on queues rather than rcu
Date: Mon, 25 Aug 2008 10:44:03 -0500 [thread overview]
Message-ID: <48B2D343.4020100@linux-foundation.org> (raw)
In-Reply-To: <20080825151220.GA6745@linux.vnet.ibm.com>
Paul E. McKenney wrote:
> But I am not sure that this gets the grace periods to go fast enough to
> cover Christoph's use case -- he seems to be in a "faster is better"
> space rather than in an "at least this fast" space. Still, it would
> likely help in some important cases.
I think there was an AIM9 regression in the close/open tests when the struct
file was switched to RCU. That test could be run with various intervals to
figure out if a shorter RCU period is beneficial and how short an RCU period
is needed to avoid the regression.
next prev parent reply other threads:[~2008-08-25 15:50 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-22 0:29 [PATCH 2/2] smp_call_function: use rwlocks on queues rather than rcu Jeremy Fitzhardinge
2008-08-22 1:53 ` Nick Piggin
2008-08-22 6:28 ` Ingo Molnar
2008-08-22 7:06 ` Pekka Enberg
2008-08-22 7:12 ` Ingo Molnar
2008-08-22 9:12 ` Nick Piggin
2008-08-22 14:01 ` Christoph Lameter
2008-08-22 15:11 ` Paul E. McKenney
2008-08-22 17:14 ` Christoph Lameter
2008-08-22 18:29 ` Paul E. McKenney
2008-08-22 18:33 ` Andi Kleen
2008-08-22 18:35 ` Jeremy Fitzhardinge
2008-08-23 7:34 ` Andi Kleen
2008-08-24 4:55 ` Jeremy Fitzhardinge
2008-08-24 9:01 ` Andi Kleen
2008-08-22 22:40 ` Paul E. McKenney
2008-08-22 18:36 ` Christoph Lameter
2008-08-22 19:52 ` Paul E. McKenney
2008-08-22 20:03 ` Christoph Lameter
2008-08-22 20:53 ` Paul E. McKenney
2008-08-25 10:31 ` Peter Zijlstra
2008-08-25 15:12 ` Paul E. McKenney
2008-08-25 15:22 ` Peter Zijlstra
2008-08-25 15:46 ` Christoph Lameter
2008-08-25 15:51 ` Peter Zijlstra
2008-08-26 13:43 ` Paul E. McKenney
2008-08-26 14:07 ` Peter Zijlstra
2008-08-27 15:16 ` Paul E. McKenney
2008-08-25 20:04 ` Paul E. McKenney
2008-08-26 5:13 ` Nick Piggin
2008-08-26 13:40 ` [PATCH 2/2] smp_call_function: use rwlocks on queues rather?than rcu Paul E. McKenney
2008-08-25 15:44 ` Christoph Lameter [this message]
2008-08-25 20:05 ` [PATCH 2/2] smp_call_function: use rwlocks on queues rather than rcu Paul E. McKenney
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=48B2D343.4020100@linux-foundation.org \
--to=cl@linux-foundation.org \
--cc=andi@firstfloor.org \
--cc=jens.axboe@oracle.com \
--cc=jeremy@goop.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@elte.hu \
--cc=nickpiggin@yahoo.com.au \
--cc=paulmck@linux.vnet.ibm.com \
--cc=penberg@cs.helsinki.fi \
--cc=peterz@infradead.org \
--cc=rusty@rustcorp.com.au \
--cc=suresh.b.siddha@intel.com \
--cc=venkatesh.pallipadi@intel.com \
/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.