From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755462Ab1CHP5R (ORCPT ); Tue, 8 Mar 2011 10:57:17 -0500 Received: from flusers.ccur.com ([173.221.59.2]:56057 "EHLO gamx.iccur.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754836Ab1CHP5Q (ORCPT ); Tue, 8 Mar 2011 10:57:16 -0500 Date: Tue, 8 Mar 2011 10:57:10 -0500 From: Joe Korty To: "Paul E. McKenney" Cc: Frederic Weisbecker , "linux-kernel@vger.kernel.org" Subject: Re: [PATCH] An RCU for SMP with a single CPU garbage collector Message-ID: <20110308155710.GA15138@tsunami.ccur.com> Reply-To: Joe Korty References: <20101113223046.GB5445@nowhere> <20101116012846.GV2555@linux.vnet.ibm.com> <20101116135230.GA5362@nowhere> <20101116155104.GB2497@linux.vnet.ibm.com> <20101117005229.GC26243@nowhere> <20110307203106.GA23002@tsunami.ccur.com> <20110307210157.GG3104@linux.vnet.ibm.com> <20110307211613.GA26455@tsunami.ccur.com> <20110307225110.GA19414@tsunami.ccur.com> <20110308090742.GO3104@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20110308090742.GO3104@linux.vnet.ibm.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Mar 08, 2011 at 04:07:42AM -0500, Paul E. McKenney wrote: >> Thinking about it some more, the tap-into-syscall approach might >> work in my implementation, in which case the tap-into-preempt-enable >> code could go away. > > OK, please let me know how that goes! > >> Nice thing about RCU, the algorithms are infinitely mallable :) > > Just trying to keep the code size finite. ;-) I hope to get to it this afternoon! I especially like the lockless nature of JRCU, and that the dedicated cpus are not loaded down with callback inovcations either. Not sure how to support the PREEMPT_RCU mode though; so if Fredrick is planning to support that, that alone would make his approach the very best. Joe