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 E8C2F6B01F0 for ; Thu, 26 Aug 2010 01:50:07 -0400 (EDT) Received: by pxi5 with SMTP id 5so601052pxi.14 for ; Wed, 25 Aug 2010 22:50:07 -0700 (PDT) Date: Thu, 26 Aug 2010 13:54:17 +0800 From: =?utf-8?Q?Am=C3=A9rico?= Wang Subject: Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator framework Message-ID: <20100826055417.GA5157@cr0.nay.redhat.com> 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> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: Sender: owner-linux-mm@kvack.org To: =?utf-8?Q?Micha=C5=82?= Nazarewicz Cc: KAMEZAWA Hiroyuki , FUJITA Tomonori , Daniel Walker , Russell King , Jonathan Corbet , Peter Zijlstra , Pawel Osciak , Konrad Rzeszutek Wilk , linux-kernel@vger.kernel.org, Mel Gorman , Hans Verkuil , linux-mm@kvack.org, Kyungmin Park , Zach Pfeffer , Mark Brown , Andrew Morton , Marek Szyprowski , linux-arm-kernel@lists.infradead.org, linux-media@vger.kernel.org List-ID: On Thu, Aug 26, 2010 at 06:01:56AM +0200, MichaA? Nazarewicz wrote: >KAMEZAWA Hiroyuki wrote: >>128MB...too big ? But it's depend on config. > >On embedded systems it may be like half of the RAM. Or a quarter. So bigger >granularity could be desired on some platforms. > >>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. > >That's how CMA works at the moment. But if I understand you correctly, what >you are proposing would allow to reserve memory *at* *runtime* long after system >has booted. This would be a nice feature as well though. > Yeah, if we can do this, that will avoid rebooting for kdump to reserve memory. Thanks. -- 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