Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751550Ab0F1Qio (ORCPT ); Mon, 28 Jun 2010 12:38:44 -0400 Received: from b.mail.sonic.net ([64.142.19.5]:52199 "EHLO b.mail.sonic.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751011Ab0F1Qik (ORCPT ); Mon, 28 Jun 2010 12:38:40 -0400 X-Greylist: delayed 1636 seconds by postgrey-1.27 at vger.kernel.org; Mon, 28 Jun 2010 12:38:40 EDT Message-ID: <4C28C908.8090808@twiddle.net> Date: Mon, 28 Jun 2010 09:08:40 -0700 From: Richard Henderson User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.10) Gecko/20100621 Fedora/3.0.5-1.fc13 Thunderbird/3.0.5 MIME-Version: 1.0 To: Michael Cree CC: Dave Airlie , FUJITA Tomonori , mattst88@gmail.com, linux-kernel@vger.kernel.org, linux-alpha@vger.kernel.org, ink@jurassic.park.msu.ru, jbarnes@virtuousgeek.org, linux-pci@vger.kernel.org, dri-devel@lists.freedesktop.org, alexdeucher@gmail.com, jglisse@redhat.com Subject: Re: Problems with alpha/pci + radeon/ttm References: <20100622145805R.fujita.tomonori@lab.ntt.co.jp> <4C232AAC.2010200@orcon.net.nz> <20100627131836T.fujita.tomonori@lab.ntt.co.jp> <4C272C1C.9000802@orcon.net.nz> <4C286568.60901@orcon.net.nz> In-Reply-To: <4C286568.60901@orcon.net.nz> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 894 Lines: 21 On 06/28/2010 02:03 AM, Michael Cree wrote: > On 28/06/10 11:14, Dave Airlie wrote: >> The bus error is caused by the kernel, its something alpha specific >> with how mmap works, >> I'm not sure if alpha needs some special mmap flags or something, > > Neither am I. All I know is that Alpha reorders CPU instructions more > aggressively than most other architectures, the page map size is 8kB, > and memory accesses must be aligned to the datum size. There are no special mmap flags on alpha. The non-cacheable property is a function of the physical address (e.g. bit 40 set for ev5), and this has already been taken care of by the kernel. r~ -- 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/