Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932213AbWB1SY4 (ORCPT ); Tue, 28 Feb 2006 13:24:56 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932393AbWB1SY4 (ORCPT ); Tue, 28 Feb 2006 13:24:56 -0500 Received: from zrtps0kn.nortelnetworks.com ([47.140.192.55]:35211 "EHLO zrtps0kn.nortel.com") by vger.kernel.org with ESMTP id S932213AbWB1SY4 (ORCPT ); Tue, 28 Feb 2006 13:24:56 -0500 Message-ID: <44049559.80109@nortel.com> Date: Tue, 28 Feb 2006 12:24:25 -0600 From: "Christopher Friesen" User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.6) Gecko/20040115 X-Accept-Language: en-us, en MIME-Version: 1.0 To: "linux-os (Dick Johnson)" CC: "Bryan O'Sullivan" , Jes Sorensen , Andrew Morton , Andi Kleen , linux-kernel Subject: Re: [PATCH] Define wc_wmb, a write barrier for PCI write combining References: <1140841250.2587.33.camel@localhost.localdomain> <1141149475.24103.18.camel@camp4.serpentine.com> In-Reply-To: Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 28 Feb 2006 18:24:27.0903 (UTC) FILETIME=[359E48F0:01C63C94] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 457 Lines: 14 linux-os (Dick Johnson) wrote: > Also, the > PCI bus is a FIFO. Nothing gets reordered. The CPU itself can reorder the write before it hits the PCI bus. I don't think x86 will do this, but others will. 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/