From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756207Ab3KVVTJ (ORCPT ); Fri, 22 Nov 2013 16:19:09 -0500 Received: from mga01.intel.com ([192.55.52.88]:51901 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755338Ab3KVVTF (ORCPT ); Fri, 22 Nov 2013 16:19:05 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.93,753,1378882800"; d="scan'208";a="438268480" From: Andi Kleen To: "H. Peter Anvin" Cc: Akinobu Mita , LKML , Andrew Morton , Marek Szyprowski , Konrad Rzeszutek Wilk , Thomas Gleixner , Ingo Molnar , x86@kernel.org Subject: Re: [PATCH] x86: enable DMA CMA with swiotlb References: <1384903939-3371-1-git-send-email-akinobu.mita@gmail.com> <528D4A1A.2050100@zytor.com> <528E4CBA.8000808@zytor.com> <528F71F8.4070902@zytor.com> Date: Fri, 22 Nov 2013 13:19:04 -0800 In-Reply-To: <528F71F8.4070902@zytor.com> (H. Peter Anvin's message of "Fri, 22 Nov 2013 07:02:16 -0800") Message-ID: <87fvqow2wn.fsf@tassilo.jf.intel.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org "H. Peter Anvin" writes: > > If you have a real iotlb, why would you need contiguous memory? iotlb is often slow. Another use case is allocating 1GB pages at runtime. -Andi -- ak@linux.intel.com -- Speaking for myself only