From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754845Ab0JNHYa (ORCPT ); Thu, 14 Oct 2010 03:24:30 -0400 Received: from one.firstfloor.org ([213.235.205.2]:60959 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754528Ab0JNHY3 (ORCPT ); Thu, 14 Oct 2010 03:24:29 -0400 Date: Thu, 14 Oct 2010 09:24:21 +0200 From: Andi Kleen To: FUJITA Tomonori Cc: andi@firstfloor.org, kamezawa.hiroyu@jp.fujitsu.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, minchan.kim@gmail.com Subject: Re: [RFC][PATCH 1/3] contigous big page allocator Message-ID: <20101014072421.GA13414@basil.fritz.box> References: <20101013121527.8ec6a769.kamezawa.hiroyu@jp.fujitsu.com> <87sk0a1sq0.fsf@basil.nowhere.org> <20101014160217N.fujita.tomonori@lab.ntt.co.jp> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101014160217N.fujita.tomonori@lab.ntt.co.jp> 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 On Thu, Oct 14, 2010 at 04:07:12PM +0900, FUJITA Tomonori wrote: > On Wed, 13 Oct 2010 09:01:43 +0200 > Andi Kleen wrote: > > > KAMEZAWA Hiroyuki writes: > > > > > > What this wants to do: > > > allocates a contiguous chunk of pages larger than MAX_ORDER. > > > for device drivers (camera? etc..) > > > > I think to really move forward you need a concrete use case > > actually implemented in tree. > > As already pointed out, some embeded drivers need physcailly > contignous memory. Currenlty, they use hacky tricks (e.g. playing with > the boot memory allocators). There are several proposals for this like Are any of those in mainline? -Andi -- ak@linux.intel.com -- Speaking for myself only.