From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263176AbTDYN4c (ORCPT ); Fri, 25 Apr 2003 09:56:32 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263177AbTDYN4c (ORCPT ); Fri, 25 Apr 2003 09:56:32 -0400 Received: from pc2-cwma1-4-cust86.swan.cable.ntl.com ([213.105.254.86]:48264 "EHLO lxorguk.ukuu.org.uk") by vger.kernel.org with ESMTP id S263176AbTDYN4b (ORCPT ); Fri, 25 Apr 2003 09:56:31 -0400 Subject: RE: cciss patches for 2.4.21-rc1, 4 of 4 From: Alan Cox To: "Miller, Mike (OS Dev)" Cc: "Cameron, Steve" , Linux Kernel Mailing List In-Reply-To: References: Content-Type: text/plain Content-Transfer-Encoding: 7bit Organization: Message-Id: <1051276193.5902.9.camel@dhcp22.swansea.linux.org.uk> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.2.2 (1.2.2-5) Date: 25 Apr 2003 14:09:53 +0100 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Gwe, 2003-04-25 at 14:48, Miller, Mike (OS Dev) wrote: > I haven't seen any issues (yet) on ia64. I'm running with 5GB RAM. That doesn't make it correct. This same problem occurs in other drivers and the usual trick is to set the pci mask to 32bit, allocate those command buffers ready, then flip back to 64bit. Just be sure one thread doesn't change it to 64bit while another is allocating commands. The reverse is fine since an accidental odd bounce is no big deal