From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pd0-f175.google.com (mail-pd0-f175.google.com [209.85.192.175]) by kanga.kvack.org (Postfix) with ESMTP id 26AE36B00E3 for ; Wed, 12 Nov 2014 11:33:49 -0500 (EST) Received: by mail-pd0-f175.google.com with SMTP id y13so12501618pdi.6 for ; Wed, 12 Nov 2014 08:33:48 -0800 (PST) Received: from blackbird.sr71.net (www.sr71.net. [198.145.64.142]) by mx.google.com with ESMTP id bi2si23247802pbb.68.2014.11.12.08.33.45 for ; Wed, 12 Nov 2014 08:33:45 -0800 (PST) Message-ID: <54638BE4.3080509@sr71.net> Date: Wed, 12 Nov 2014 08:33:40 -0800 From: Dave Hansen MIME-Version: 1.0 Subject: Re: [RFC PATCH 1/5] mm/page_ext: resurrect struct page extending code for debugging References: <1415780835-24642-1-git-send-email-iamjoonsoo.kim@lge.com> <1415780835-24642-2-git-send-email-iamjoonsoo.kim@lge.com> In-Reply-To: <1415780835-24642-2-git-send-email-iamjoonsoo.kim@lge.com> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Joonsoo Kim , Andrew Morton Cc: Mel Gorman , Johannes Weiner , Minchan Kim , Alexander Nyberg , Dave Hansen , Michal Nazarewicz , Jungsoo Son , Ingo Molnar , linux-mm@kvack.org, linux-kernel@vger.kernel.org On 11/12/2014 12:27 AM, Joonsoo Kim wrote: > @@ -1092,6 +1096,14 @@ struct mem_section { > > /* See declaration of similar field in struct zone */ > unsigned long *pageblock_flags; > +#ifdef CONFIG_PAGE_EXTENSION > + /* > + * If !SPARSEMEM, pgdat doesn't have page_ext pointer. We use > + * section. (see page_ext.h about this.) > + */ > + struct page_ext *page_ext; > + unsigned long pad; > +#endif Will the distributions be amenable to enabling this? If so, I'm all for it if it gets us things like page_owner at runtime. If not, this becomes of much more questionable utility. -- 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