From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Mon, 21 May 2001 04:11:53 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Mon, 21 May 2001 04:11:43 -0400 Received: from pizda.ninka.net ([216.101.162.242]:13729 "EHLO pizda.ninka.net") by vger.kernel.org with ESMTP id ; Mon, 21 May 2001 04:11:35 -0400 From: "David S. Miller" MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <15112.52655.885447.500126@pizda.ninka.net> Date: Mon, 21 May 2001 01:11:27 -0700 (PDT) To: Alan Cox Cc: andrewm@uow.edu.au (Andrew Morton), andrea@suse.de (Andrea Arcangeli), ink@jurassic.park.msu.ru (Ivan Kokshaysky), rth@twiddle.net (Richard Henderson), linux-kernel@vger.kernel.org Subject: Re: alpha iommu fixes In-Reply-To: In-Reply-To: <15112.51569.744590.398000@pizda.ninka.net> X-Mailer: VM 6.75 under 21.1 (patch 13) "Crater Lake" XEmacs Lucid Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Alan Cox writes: > Pages allocated in main memory and mapped for access by PCI devices. On some > HP systems there is now way for such a page to stay coherent. It is quite > possible to sync the view but there is no sane way to allow any > pci_alloc_consistent to succeed This is not what the HP folk told me, and in fact they said that pci_alloc_consistent could be made to work via disabling the cache attribute in the cpu side mappings or something similar in the PCI controller IOMMU mappings. Please someone on the HPPA team provide details :-) Later, David S. Miller davem@redhat.com