Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757497AbXHHEur (ORCPT ); Wed, 8 Aug 2007 00:50:47 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751998AbXHHEui (ORCPT ); Wed, 8 Aug 2007 00:50:38 -0400 Received: from zrtps0kp.nortel.com ([47.140.192.56]:62949 "EHLO zrtps0kp.nortel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750928AbXHHEuh (ORCPT ); Wed, 8 Aug 2007 00:50:37 -0400 Message-ID: <46B94B94.6000600@nortel.com> Date: Tue, 07 Aug 2007 22:50:28 -0600 From: "Chris Friesen" User-Agent: Mozilla Thunderbird 1.0.2-6 (X11/20050513) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Chris Snook CC: Zan Lynx , Jerry Jiang , "Robert P. J. Day" , Linux Kernel Mailing List Subject: Re: why are some atomic_t's not volatile, while most are? References: <20070806123551.a6c3c154.wjiang@resilience.com> <46B72C58.5030502@redhat.com> <46B894E4.4010501@nortel.com> <46B8D6D7.2020206@redhat.com> <46B8DDF3.7050008@nortel.com> <46B8E1D3.8050501@redhat.com> <46B8E64E.7010708@nortel.com> <1186525977.232321.43.camel@localhost> <46B91D0C.5050704@redhat.com> In-Reply-To: <46B91D0C.5050704@redhat.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 08 Aug 2007 04:50:32.0029 (UTC) FILETIME=[A673C8D0:01C7D977] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 474 Lines: 14 Chris Snook wrote: > This is not a problem, since indirect references will cause the CPU to > fetch the data from memory/cache anyway. Isn't Zan's sample code (that shows the problem) already using indirect references? Chris - 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/