Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030215AbWCHWBc (ORCPT ); Wed, 8 Mar 2006 17:01:32 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030216AbWCHWBc (ORCPT ); Wed, 8 Mar 2006 17:01:32 -0500 Received: from outpipe-village-512-1.bc.nu ([81.2.110.250]:64718 "EHLO lxorguk.ukuu.org.uk") by vger.kernel.org with ESMTP id S1030215AbWCHWBb (ORCPT ); Wed, 8 Mar 2006 17:01:31 -0500 Subject: Re: [PATCH] Define flush_wc, a way to flush write combining store buffers From: Alan Cox To: "Bryan O'Sullivan" Cc: akpm@osdl.org, ak@suse.de, paulus@samba.org, benh@kernel.crashing.org, bcrl@kvack.org, linux-kernel@vger.kernel.org In-Reply-To: References: Content-Type: text/plain Content-Transfer-Encoding: 7bit Date: Wed, 08 Mar 2006 22:06:31 +0000 Message-Id: <1141855591.10606.12.camel@localhost.localdomain> Mime-Version: 1.0 X-Mailer: Evolution 2.2.3 (2.2.3-2.fc4) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 620 Lines: 14 On Mer, 2006-03-08 at 13:31 -0800, Bryan O'Sullivan wrote: > flush_wc() says nothing about whether {A,B,C} may be reordered with > respect to each other, or whether {D,E} may, but it guarantees that > {A,B,C} will make it off-CPU before {D,E}. An arch that implements > flush_wc() should make the stores occur immediately, if possible. How is this different to mmiowb() ? - 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/