From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail138.messagelabs.com (mail138.messagelabs.com [216.82.249.35]) by kanga.kvack.org (Postfix) with SMTP id 32B0E600815 for ; Tue, 27 Jul 2010 10:35:56 -0400 (EDT) Date: Tue, 27 Jul 2010 09:34:59 -0500 (CDT) From: Christoph Lameter Subject: Re: [PATCH] Tight check of pfn_valid on sparsemem - v4 In-Reply-To: Message-ID: References: <1280159163-23386-1-git-send-email-minchan.kim@gmail.com> <20100727171351.98d5fb60.kamezawa.hiroyu@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org To: Minchan Kim Cc: KAMEZAWA Hiroyuki , Milton Miller , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Andrew Morton , Russell King , Mel Gorman , Johannes Weiner , Kukjin Kim List-ID: On Tue, 27 Jul 2010, Minchan Kim wrote: > But in fact I have a concern to use PG_reserved since it can be used > afterward pfn_valid normally to check hole in non-hole system. So I > think it's redundant. PG_reserved is already used to mark pages not handled by the page allocator (see mmap_init_zone). -- 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