Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757847AbXJAWJ3 (ORCPT ); Mon, 1 Oct 2007 18:09:29 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757166AbXJAWJV (ORCPT ); Mon, 1 Oct 2007 18:09:21 -0400 Received: from x35.xmailserver.org ([64.71.152.41]:35520 "EHLO x35.xmailserver.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756272AbXJAWJT (ORCPT ); Mon, 1 Oct 2007 18:09:19 -0400 X-AuthUser: davidel@xmailserver.org Date: Mon, 1 Oct 2007 15:09:16 -0700 (PDT) From: Davide Libenzi X-X-Sender: davide@alien.or.mcafeemobile.com To: "Paul E. McKenney" cc: Oleg Nesterov , Linux Kernel Mailing List , linux-rt-users@vger.kernel.org, Ingo Molnar , Andrew Morton , dipankar@in.ibm.com, josht@linux.vnet.ibm.com, tytso@us.ibm.com, dvhltc@us.ibm.com, tglx@linutronix.de, a.p.zijlstra@chello.nl, bunk@kernel.org, ego@in.ibm.com, srostedt@redhat.com Subject: Re: [PATCH RFC 3/9] RCU: Preemptible RCU In-Reply-To: <20071001192136.GC29100@linux.vnet.ibm.com> Message-ID: References: <20070923173807.GA292@tv-sign.ru> <20070924001509.GG11123@linux.vnet.ibm.com> <20070926151351.GA328@tv-sign.ru> <20070927154652.GE16652@linux.vnet.ibm.com> <20070928144714.GA397@tv-sign.ru> <20070928185759.GC9153@linux.vnet.ibm.com> <20070930163102.GA374@tv-sign.ru> <20071001013739.GB12494@linux.vnet.ibm.com> <20071001192136.GC29100@linux.vnet.ibm.com> X-GPG-FINGRPRINT: CFAE 5BEE FD36 F65E E640 56FE 0974 BF23 270F 474E X-GPG-PUBLIC_KEY: http://www.xmailserver.org/davidel.asc MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 694 Lines: 20 On Mon, 1 Oct 2007, Paul E. McKenney wrote: > That would indeed be one approach that CPU designers could take to > avoid being careless or sadistic. ;-) That'd be the easier (unique maybe) approach too for them, from an silicon complexity POV. Distinguishing between different CPUs stores once inside a shared store buffer, would require tagging them in some way. That'd defeat most of the pros of having a shared store buffer ;) - Davide - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/