From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753331Ab2CJKKh (ORCPT ); Sat, 10 Mar 2012 05:10:37 -0500 Received: from casper.infradead.org ([85.118.1.10]:50762 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751699Ab2CJKKg convert rfc822-to-8bit (ORCPT ); Sat, 10 Mar 2012 05:10:36 -0500 Message-ID: <1331374193.18960.13.camel@twins> Subject: Re: [RFC PATCH 5/6] implement per-cpu&per-domain state machine call_srcu() From: Peter Zijlstra To: paulmck@linux.vnet.ibm.com Cc: Lai Jiangshan , Lai Jiangshan , linux-kernel@vger.kernel.org, mingo@elte.hu, 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, tj@kernel.org Date: Sat, 10 Mar 2012 11:09:53 +0100 In-Reply-To: <20120308195825.GC2412@linux.vnet.ibm.com> References: <1331023359-6987-1-git-send-email-laijs@cn.fujitsu.com> <1331027858-7648-1-git-send-email-laijs@cn.fujitsu.com> <1331027858-7648-5-git-send-email-laijs@cn.fujitsu.com> <1331032571.11248.277.camel@twins> <1331048093.11248.317.camel@twins> <20120308195825.GC2412@linux.vnet.ibm.com> Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT X-Mailer: Evolution 3.2.2- Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 2012-03-08 at 11:58 -0800, Paul E. McKenney wrote: > > But I guess I should ask... Peter, what do you expect the maximum > call_srcu() rate to be in your use cases? If tens of thousands are > possible, some adjustments will be needed. The one call-site I currently have is linked to vma lifetimes, so yeah, I guess that that can be lots.