Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934619AbZKYJGc (ORCPT ); Wed, 25 Nov 2009 04:06:32 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S934496AbZKYJGc (ORCPT ); Wed, 25 Nov 2009 04:06:32 -0500 Received: from sh.osrg.net ([192.16.179.4]:48823 "EHLO sh.osrg.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934548AbZKYJGb (ORCPT ); Wed, 25 Nov 2009 04:06:31 -0500 Date: Wed, 25 Nov 2009 18:05:47 +0900 To: yinghai@kernel.org Cc: mingo@elte.hu, fujita.tomonori@lab.ntt.co.jp, linux-kernel@vger.kernel.org Subject: Re: [PATCH -tip] x86: fix iommu=soft boot option From: FUJITA Tomonori In-Reply-To: <4B0CF0CA.30807@kernel.org> References: <4B0C7257.3070609@kernel.org> <20091125081832.GA1822@elte.hu> <4B0CF0CA.30807@kernel.org> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-Id: <20091125180517P.fujita.tomonori@lab.ntt.co.jp> X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-3.0 (sh.osrg.net [192.16.179.4]); Wed, 25 Nov 2009 18:05:47 +0900 (JST) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 814 Lines: 12 On Wed, 25 Nov 2009 00:54:34 -0800 Yinghai Lu wrote: > only remember that SLES 9 SP3 (?) at some point has problem with AMD 10h ( quad core version) > when memory > 4 g (with USB controller ?) > because the gart code only check K8 device id, and didn't check 10h device id. so gart iommu is not used. > and happenly swiotlb code has problem with that kernel version. > > thinking we should keep old behavior, until some day we can remove them all. Why? We are talking about changing 2.6.33 behavior. swiotlb in 2.6.33 should be the safe option. -- 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/