From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail191.messagelabs.com (mail191.messagelabs.com [216.82.242.19]) by kanga.kvack.org (Postfix) with SMTP id C4D606B01F0 for ; Thu, 26 Aug 2010 00:14:08 -0400 (EDT) Received: by iwn33 with SMTP id 33so1598623iwn.14 for ; Wed, 25 Aug 2010 21:14:08 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: References: <1282310110.2605.976.camel@laptop> <20100825155814.25c783c7.akpm@linux-foundation.org> <20100826095857.5b821d7f.kamezawa.hiroyu@jp.fujitsu.com> <20100826115017.04f6f707.kamezawa.hiroyu@jp.fujitsu.com> <20100826124434.6089630d.kamezawa.hiroyu@jp.fujitsu.com> Date: Thu, 26 Aug 2010 13:14:07 +0900 Message-ID: Subject: Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator framework From: Minchan Kim Content-Type: text/plain; charset=ISO-8859-1 Sender: owner-linux-mm@kvack.org To: KAMEZAWA Hiroyuki Cc: =?ISO-8859-2?Q?Micha=B3_Nazarewicz?= , Andrew Morton , Hans Verkuil , Daniel Walker , Russell King , Jonathan Corbet , Peter Zijlstra , Pawel Osciak , Konrad Rzeszutek Wilk , linux-kernel@vger.kernel.org, FUJITA Tomonori , linux-mm@kvack.org, Kyungmin Park , Zach Pfeffer , Mark Brown , Mel Gorman , linux-media@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Marek Szyprowski List-ID: On Thu, Aug 26, 2010 at 1:06 PM, Minchan Kim wrote: > On Thu, Aug 26, 2010 at 12:44 PM, KAMEZAWA Hiroyuki > wrote: >> On Thu, 26 Aug 2010 11:50:17 +0900 >> KAMEZAWA Hiroyuki wrote: >> >>> 128MB...too big ? But it's depend on config. >>> >>> IBM's ppc guys used 16MB section, and recently, a new interface to shrink >>> the number of /sys files are added, maybe usable. >>> >>> Something good with this approach will be you can create "cma" memory >>> before installing driver. >>> >>> But yes, complicated and need some works. >>> >> Ah, I need to clarify what I want to say. >> >> With compaction, it's helpful, but you can't get contiguous memory larger >> than MAX_ORDER, I think. To get memory larger than MAX_ORDER on demand, >> memory hot-plug code has almost all necessary things. > > True. Doesn't patch's idea of Christoph helps this ? > http://lwn.net/Articles/200699/ Of course, It itself can't meet our requirement but idea of range allocation seem to be good. I think it can be start point. > > -- > Kind regards, > Minchan Kim > -- Kind regards, Minchan Kim -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org