Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754723AbXLIAry (ORCPT ); Sat, 8 Dec 2007 19:47:54 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753085AbXLIArq (ORCPT ); Sat, 8 Dec 2007 19:47:46 -0500 Received: from smtp2.linux-foundation.org ([207.189.120.14]:35112 "EHLO smtp2.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752945AbXLIArp (ORCPT ); Sat, 8 Dec 2007 19:47:45 -0500 Date: Sat, 8 Dec 2007 16:47:17 -0800 (PST) From: Linus Torvalds To: Marco Gatti cc: Andrew Morton , linux-kernel@vger.kernel.org, Greg KH , Thomas Gleixner , Ingo Molnar Subject: Re: Bug: get EXT3-fs error Allocating block in system zone In-Reply-To: <475B0AD7.10500@pianoinflames.de> Message-ID: References: <4755BEA1.4090604@pianoinflames.de> <20071206162500.1f76a234.akpm@linux-foundation.org> <475B0AD7.10500@pianoinflames.de> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 935 Lines: 27 On Sat, 8 Dec 2007, Marco Gatti wrote: > > Today, I tested with different amounts of RAM: > > 2 GB: everything works fine > 4 GB: same issue as described before with allocating block in system zone > > So what to do, in order to use more than 2 Gigs of RAM? Was there a dmesg out there somewhere? With 4G of RAM, you probably have some of it above the 4GB mark (because of RAM remapping etc, and the PCI decode hole in the low 4GB). It does sound like this is a DMA problem, and your controller cannot correctly DMA to the upper 4GB. So what controller/driver, what's the dmesg, and let's see if we can fix it by adding a DMA mask to it to limit it to the low 32 bits. Linus -- 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/