Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753950AbZJ0Lvn (ORCPT ); Tue, 27 Oct 2009 07:51:43 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753691AbZJ0Lvm (ORCPT ); Tue, 27 Oct 2009 07:51:42 -0400 Received: from lennier.cc.vt.edu ([198.82.162.213]:35309 "EHLO lennier.cc.vt.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753684AbZJ0Lvm (ORCPT ); Tue, 27 Oct 2009 07:51:42 -0400 X-Mailer: exmh version 2.7.2 01/07/2005 with nmh-1.2 To: "Leonidas ." Cc: Chris Friesen , Noah Watkins , linux-kernel Subject: Re: Difference between atomic operations and memory barriers In-Reply-To: Your message of "Tue, 27 Oct 2009 00:30:45 +0530." From: Valdis.Kletnieks@vt.edu References: <7ADB5FD7-9C97-4987-BC20-997258B25FD2@noahdesu.com> <4AE5F04E.3050908@nortel.com> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="==_Exmh_1256644303_9496P"; micalg=pgp-sha1; protocol="application/pgp-signature" Content-Transfer-Encoding: 7bit Date: Tue, 27 Oct 2009 07:51:43 -0400 Message-ID: <45208.1256644303@turing-police.cc.vt.edu> X-Mirapoint-Received-SPF: 128.173.34.98 turing-police.cc.vt.edu Valdis.Kletnieks@vt.edu 2 pass X-Mirapoint-IP-Reputation: reputation=neutral-1, source=Fixed, refid=n/a, actions=MAILHURDLE SPF TAG X-Junkmail-Info: (0) X-Junkmail-Status: score=10/50, host=dagger.cc.vt.edu X-Junkmail-SD-Raw: score=unknown, refid=str=0001.0A020209.4AE6DED0.0006,ss=1,fgs=0, ip=0.0.0.0, so=2009-07-29 21:33:33, dmn=2009-09-10 00:05:08, mode=multiengine X-Junkmail-IWF: false Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1154 Lines: 36 --==_Exmh_1256644303_9496P Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable On Tue, 27 Oct 2009 00:30:45 +0530, =22Leonidas .=22 said: > So we can safely assume that pointer assignment will be done in an > atomic manner? Has anybody ever actually made a *production* CPU that had non-atomic pointer assignments? And how long before the crazed programmers lynched and burned the offending CPU designer at the stake? ;) Non-atomic pointer assignments are the CPU design equivalent of Vogon poe= try. Just Say No. With a shotgun if needed. --==_Exmh_1256644303_9496P Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) Comment: Exmh version 2.5 07/13/2001 iD8DBQFK5t7PcC3lWbTT17ARAkz6AKDk19ZTnmCXmhHWdLtltquvE7xVCQCgwKDP gKQsp2yg4DgldmdfL0vZipM= =TxCn -----END PGP SIGNATURE----- --==_Exmh_1256644303_9496P-- -- 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/