From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756064Ab2DIJfN (ORCPT ); Mon, 9 Apr 2012 05:35:13 -0400 Received: from lxorguk.ukuu.org.uk ([81.2.110.251]:39007 "EHLO lxorguk.ukuu.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753471Ab2DIJfM (ORCPT ); Mon, 9 Apr 2012 05:35:12 -0400 Date: Mon, 9 Apr 2012 10:37:45 +0100 From: Alan Cox To: Dave Jones Cc: "H. Peter Anvin" , Xin Tong , linux-kernel Subject: Re: oostore on x86 Message-ID: <20120409103745.487fa6f1@pyramind.ukuu.org.uk> In-Reply-To: <20120408232728.GA29407@redhat.com> References: <4F820804.2040302@zytor.com> <20120408232728.GA29407@redhat.com> X-Mailer: Claws Mail 3.8.0 (GTK+ 2.24.8; x86_64-redhat-linux-gnu) Face: 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 Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > I've suggested just removing that code in the past a few times. > Even if it does still work, anyone complaining about performance loss > of a modern kernel on something of that era can't be taken seriously. I'm not sure removing it makes sense given what a tiny spec of code is involved. Also in practice most of the same bits are actually used with different fencing operators on PPro for errata and on PIII and higher for temporal stores. Of the tree tiny changes it causes two are identical to PPro... Alan