From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262665AbVENOYi (ORCPT ); Sat, 14 May 2005 10:24:38 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262765AbVENOYi (ORCPT ); Sat, 14 May 2005 10:24:38 -0400 Received: from pentafluge.infradead.org ([213.146.154.40]:45955 "EHLO pentafluge.infradead.org") by vger.kernel.org with ESMTP id S262665AbVENOYg (ORCPT ); Sat, 14 May 2005 10:24:36 -0400 Subject: [Fwd: SMP Large Buffers] From: Arjan van de Ven To: linux-kernel@vger.kernel.org Cc: matt@finaldraftbooks.com Content-Type: text/plain Date: Sat, 14 May 2005 16:24:32 +0200 Message-Id: <1116080673.6007.9.camel@laptopd505.fenrus.org> Mime-Version: 1.0 X-Mailer: Evolution 2.0.4 (2.0.4-4) Content-Transfer-Encoding: 7bit X-Spam-Score: 3.7 (+++) X-Spam-Report: SpamAssassin version 2.63 on pentafluge.infradead.org summary: Content analysis details: (3.7 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 1.1 RCVD_IN_DSBL RBL: Received via a relay in list.dsbl.org [] 2.5 RCVD_IN_DYNABLOCK RBL: Sent directly from dynamic IP address [80.57.133.107 listed in dnsbl.sorbs.net] 0.1 RCVD_IN_SORBS RBL: SORBS: sender is listed in SORBS [80.57.133.107 listed in dnsbl.sorbs.net] X-SRS-Rewrite: SMTP reverse-path rewritten from by pentafluge.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org -------- Forwarded Message -------- > From: Matthew Singer > Reply-To: matt@finaldraftbooks.com > To: 'linux-kernel-Mailing-list' , linux- > smp@vger.kernel.org > Subject: SMP Large Buffers > Date: Sat, 14 May 2005 10:06:34 -0400 > 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. well you have to access the result of the ioremap, not it's argument!