Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755842AbXIQLsc (ORCPT ); Mon, 17 Sep 2007 07:48:32 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755214AbXIQLsT (ORCPT ); Mon, 17 Sep 2007 07:48:19 -0400 Received: from mailout10.sul.t-online.de ([194.25.134.21]:52235 "EHLO mailout10.sul.t-online.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755124AbXIQLsS (ORCPT ); Mon, 17 Sep 2007 07:48:18 -0400 Message-ID: <46EE60C1.7030507@t-online.de> Date: Mon, 17 Sep 2007 13:10:57 +0200 From: Bernd Schmidt User-Agent: Thunderbird 2.0.0.6 (X11/20070810) MIME-Version: 1.0 To: Christoph Lameter CC: Nick Piggin , Mel Gorman , andrea@suse.de, torvalds@linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, Christoph Hellwig , Mel Gorman , William Lee Irwin III , David Chinner , Jens Axboe , Badari Pulavarty , Maxim Levitsky , Fengguang Wu , swin wang , totty.lu@gmail.com, hugh@veritas.com, joern@lazybastard.org Subject: Re: [00/41] Large Blocksize Support V7 (adds memmap support) References: <20070911060349.993975297@sgi.com> <200709111606.10873.nickpiggin@yahoo.com.au> <200709120407.48344.nickpiggin@yahoo.com.au> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-ID: ZB2+h0ZQ8heIYngtl4BQsRrKG5MsxTm-zCQz1qabFDaccGRiwfh33u8SzLFktaTZxM X-TOI-MSGID: e4ab883a-b1b6-4c1b-bc80-f5d8709cfcb4 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1128 Lines: 25 Christoph Lameter wrote: > True. That is why we want to limit the number of unmovable allocations and > that is why ZONE_MOVABLE exists to limit those. However, unmovable > allocations are already rare today. The overwhelming majority of > allocations are movable and reclaimable. You can see that f.e. by looking > at /proc/meminfo and see how high SUnreclaim: is (does not catch > everything but its a good indicator). Just to inject another factor into the discussion, please remember that Linux also runs on nommu systems, where things like user space allocations are neither movable nor reclaimable. Bernd -- This footer brought to you by insane German lawmakers. Analog Devices GmbH Wilhelm-Wagenfeld-Str. 6 80807 Muenchen Sitz der Gesellschaft Muenchen, Registergericht Muenchen HRB 40368 Geschaeftsfuehrer Thomas Wessel, William A. Martin, Margaret Seif - 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/