From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mathieu Desnoyers Subject: Re: [RFC patch] introduce sys_membarrier(): process-wide memory barrier (v9) Date: Thu, 25 Feb 2010 13:00:15 -0500 Message-ID: <20100225180014.GB6658@Krystal> References: <20100212224606.GA30280@Krystal> <4B82CF1A.3010501@nortel.com> <20100222212321.GA2573@Krystal> <20100224091052.GY9738@laptop> <20100224152251.GA16295@Krystal> <20100225053310.GA9738@laptop> <20100225165301.GF24052@Krystal> <1267118726.6328.20.camel@gandalf.stny.rr.com> <20100225175121.GA6658@Krystal> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from mail.openrapids.net ([64.15.138.104]:37126 "EHLO blackscsi.openrapids.net" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S933017Ab0BYSAS (ORCPT ); Thu, 25 Feb 2010 13:00:18 -0500 Content-Disposition: inline In-Reply-To: <20100225175121.GA6658@Krystal> Sender: linux-arch-owner@vger.kernel.org List-ID: To: Steven Rostedt , mingo@elte.hu Cc: Nick Piggin , Chris Friesen , linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, KOSAKI Motohiro , "Paul E. McKenney" , Nicholas Miell , Linus Torvalds , laijs@cn.fujitsu.com, dipankar@in.ibm.com, akpm@linux-foundation.org, josh@joshtriplett.org, dvhltc@us.ibm.com, niv@us.ibm.com, tglx@linutronix.de, peterz@infradead.org, Valdis.Kletnieks@vt.edu, dhowells@redhat.com * Mathieu Desnoyers (mathieu.desnoyers@efficios.com) wrote: [...] > But... either way we chose, we can extend the system call flags and parameters > as needed, so I think it really should not be part of this initial > implementation. So... considering all this discussion is about future enhancements that are not required by anyone at this stage, and that it will be possible to add these later on thanks to the extensible sys_membarrier() flags, I propose to merge v9 of this patch for 2.6.34. I think the logical path for this patch is to go through Ingo's tree, as it sits mostly along with the scheduler, but I have not heard anything from him yet. Am I taking the correct path ? Thanks, Mathieu -- Mathieu Desnoyers Operating System Efficiency Consultant EfficiOS Inc. http://www.efficios.com