Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751604Ab0DLMcq (ORCPT ); Mon, 12 Apr 2010 08:32:46 -0400 Received: from buzzloop.caiaq.de ([212.112.241.133]:53018 "EHLO buzzloop.caiaq.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750776Ab0DLMco (ORCPT ); Mon, 12 Apr 2010 08:32:44 -0400 Date: Mon, 12 Apr 2010 14:32:38 +0200 From: Daniel Mack To: Andi Kleen Cc: Pedro Ribeiro , Alan Stern , linux-kernel@vger.kernel.org, akpm@linux-foundation.org, Greg KH , alsa-devel@alsa-project.org, linux-usb@vger.kernel.org Subject: Re: USB transfer_buffer allocations on 64bit systems Message-ID: <20100412123238.GW30801@buzzloop.caiaq.de> References: <20100407090623.GN30807@buzzloop.caiaq.de> <87sk719hbm.fsf@basil.nowhere.org> <20100412111439.GU30801@buzzloop.caiaq.de> <20100412115300.GM18855@one.firstfloor.org> <20100412121243.GN18855@one.firstfloor.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20100412121243.GN18855@one.firstfloor.org> User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1432 Lines: 35 On Mon, Apr 12, 2010 at 02:12:43PM +0200, Andi Kleen wrote: > > I'm not putting into question whether something is broken in my > > system, but if it is, it must be the ICH9 platform, because I was able > > to reproduce it in another laptop. > > > > My laptop is a Lenovo T400 and I was able to reproduce it in a Acer > > Aspire 59xx (I don't remember the exact model, but it is one of the > > new ones with 15.6 inch - i think they all use the same base). And the > > common thing between them is the ICH9 platform. > > There are lots of systems around with ICH9 that work fine. > I'm typing on one. FWIW, the fix that made it work for Pedro was to use usb_buffer_alloc() for the transfer_buffer of the audio module. Another detail I can't explain is that on his machine, the kernel oopses when kmalloc() with GFP_DMA32 is used. The patch to try this also only touched the allocation in sound/usb/caiaq/audio.c. > > The only which solved this problem was the first patch sent to me by > > Daniel Mack. I've been using it for days straight and it works fine. > > Can you send a full boot log? He just did. I put it online here: http://caiaq.de/download/tmp/pedro-dmesg Daniel -- 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/