Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752249Ab3CWWY0 (ORCPT ); Sat, 23 Mar 2013 18:24:26 -0400 Received: from mail-oa0-f53.google.com ([209.85.219.53]:45940 "EHLO mail-oa0-f53.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752110Ab3CWWYZ (ORCPT ); Sat, 23 Mar 2013 18:24:25 -0400 MIME-Version: 1.0 In-Reply-To: <20130323152948.GA3036@sgi.com> References: <20130318155619.GA18828@sgi.com> <20130321105516.GC18484@gmail.com> <20130322072532.GC10608@gmail.com> <20130323152948.GA3036@sgi.com> From: KOSAKI Motohiro Date: Sat, 23 Mar 2013 18:24:04 -0400 Message-ID: Subject: Re: [patch] mm: speedup in __early_pfn_to_nid To: Russ Anderson Cc: Ingo Molnar , David Rientjes , "linux-mm@kvack.org" , LKML , Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 840 Lines: 19 > --- linux.orig/mm/page_alloc.c 2013-03-19 16:09:03.736450861 -0500 > +++ linux/mm/page_alloc.c 2013-03-22 17:07:43.895405617 -0500 > @@ -4161,10 +4161,23 @@ int __meminit __early_pfn_to_nid(unsigne > { > unsigned long start_pfn, end_pfn; > int i, nid; > + /* > + NOTE: The following SMP-unsafe globals are only used early > + in boot when the kernel is running single-threaded. > + */ > + static unsigned long last_start_pfn, last_end_pfn; > + static int last_nid; Why don't you mark them __meminitdata? They seems freeable. -- 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/