From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263086AbVGIC6C (ORCPT ); Fri, 8 Jul 2005 22:58:02 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263089AbVGIC6C (ORCPT ); Fri, 8 Jul 2005 22:58:02 -0400 Received: from bay20-f7.bay20.hotmail.com ([64.4.54.96]:19539 "EHLO hotmail.com") by vger.kernel.org with ESMTP id S263086AbVGIC6A (ORCPT ); Fri, 8 Jul 2005 22:58:00 -0400 Message-ID: X-Originating-IP: [65.64.155.98] X-Originating-Email: [jonschindler@hotmail.com] In-Reply-To: <20050709005638.GE21330@wotan.suse.de> From: "Jon Schindler" To: ak@suse.de Cc: linux-kernel@vger.kernel.org Subject: Re: USB storage does not work with 3GB of RAM, but does with 2G of RAM Date: Fri, 08 Jul 2005 22:57:58 -0400 Mime-Version: 1.0 Content-Type: text/plain; format=flowed X-OriginalArrivalTime: 09 Jul 2005 02:57:59.0421 (UTC) FILETIME=[03A392D0:01C58432] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Do you know if there is a way to tell the ehci driver to do the DMA at a lower memory address? i.e. tell the kernel to reserve a block of memory (as a boot option) and then tell the ehci driver to use that area of RAM instead? Thanks again for your help, Jon >From: Andi Kleen >To: Jon Schindler >CC: ak@suse.de, linux-kernel@vger.kernel.org >Subject: Re: USB storage does not work with 3GB of RAM, but does with 2G of >RAM >Date: Sat, 9 Jul 2005 02:56:38 +0200 > >On Fri, Jul 08, 2005 at 08:49:12PM -0400, Jon Schindler wrote: > > Hi Andi, > > > > As you suggested, removing ehci_hcd (using rmmod ehci_hcd) allows the >USB > > storage device to work. So, to answer your question, yes, the ohci_hcd > > driver does work with 3GB's of RAM. Still, knoppix 3.9 IS able to work > > with both ehci and 3GB's of RAM, so it still sounds like it's a software > > problem, not an nvidia hardware issue. > >Knoppix is 32bit I guess. The 32bit kernel will do a lot of DMA >only in the first 800-900MB (lowmem) > >-Andi > >- >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/