Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932549AbWEaA6A (ORCPT ); Tue, 30 May 2006 20:58:00 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932550AbWEaA6A (ORCPT ); Tue, 30 May 2006 20:58:00 -0400 Received: from mx1.redhat.com ([66.187.233.31]:454 "EHLO mx1.redhat.com") by vger.kernel.org with ESMTP id S932549AbWEaA57 (ORCPT ); Tue, 30 May 2006 20:57:59 -0400 Date: Tue, 30 May 2006 20:57:29 -0400 (EDT) Message-Id: <20060530.205729.73666677.davem@redhat.com> To: g.liakhovetski@gmx.de Cc: htejun@gmail.com, nico@cam.org, axboe@suse.de, James.Bottomley@SteelEye.com, bzolnier@gmail.com, james.steward@dynamicratings.com, jgarzik@pobox.com, linux-kernel@vger.kernel.org, mattjreimer@gmail.com Subject: Re: [PATCHSET] block: fix PIO cache coherency bug From: "David S. Miller" In-Reply-To: References: <447C2A48.1050200@gmail.com> X-Mailer: Mew version 4.2.52 on Emacs 21.3 / Mule 5.0 (SAKAKI) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 402 Lines: 11 The IDE string ops need to flush the cache. We've been doing that on sparc64 for more than 5 years... Otherwise, PIO transfers do not "behave" like DMA. - 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/