From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262784AbVENOKv (ORCPT ); Sat, 14 May 2005 10:10:51 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262765AbVENOHh (ORCPT ); Sat, 14 May 2005 10:07:37 -0400 Received: from cmsout02.mbox.net ([165.212.64.32]:19451 "EHLO cmsout02.mbox.net") by vger.kernel.org with ESMTP id S262640AbVENOGk (ORCPT ); Sat, 14 May 2005 10:06:40 -0400 X-USANET-Source: 165.212.11.131 IN matt@finaldraftbooks.com uadvg131.cms.usa.net X-USANET-MsgId: XID236JeNogn3817X02 X-USANET-Auth: 67.20.172.234 AUTH mrsinger@usa.net PlanetX Reply-To: From: "Matthew Singer" To: "'linux-kernel-Mailing-list'" , Subject: SMP Large Buffers Date: Sat, 14 May 2005 10:06:34 -0400 Organization: Final Draft Booksellers MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Mailer: Microsoft Office Outlook, Build 11.0.6353 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 Thread-Index: AcVYjZlh3GFp9ubZSRC9nzoBUOhqUw== Message-ID: <127JeNogl0267M31@uadvg131.cms.usa.net> Z-USANET-MsgId: XID127JeNogM0267X31 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org I'm working with a driver that needs dma buffers larger than 128K. The system is a 2 processor SMP with 2 gig total ram. Using GRUB, we set mem= to be 1984M, leaving 64M reserved. doing ioremap(0x7c000000, 0x4000000) followed by an access to x7c000000 results in an OOPS. is this an SMP issue regarding how memory in each node is mapped? (in that you can't do it this way) as it works fine on a uniprocessor machine.