From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail143.messagelabs.com (mail143.messagelabs.com [216.82.254.35]) by kanga.kvack.org (Postfix) with SMTP id C2D5F6B005C for ; Tue, 15 Sep 2009 16:39:06 -0400 (EDT) Date: Tue, 15 Sep 2009 21:38:21 +0100 (BST) From: Hugh Dickins Subject: [PATCH 4/4] mm: move highest_memmap_pfn In-Reply-To: Message-ID: References: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org To: Andrew Morton Cc: KAMEZAWA Hiroyuki , KOSAKI Motohiro , Linus Torvalds , Nick Piggin , Rik van Riel , Mel Gorman , Minchan Kim , linux-kernel@vger.kernel.org, linux-mm@kvack.org List-ID: Move highest_memmap_pfn __read_mostly from page_alloc.c next to zero_pfn __read_mostly in memory.c: to help them share a cacheline, since they're very often tested together in vm_normal_page(). Signed-off-by: Hugh Dickins --- mm/internal.h | 3 ++- mm/memory.c | 1 + mm/page_alloc.c | 1 - 3 files changed, 3 insertions(+), 2 deletions(-) --- mm3/mm/internal.h 2009-09-14 16:34:37.000000000 +0100 +++ mm4/mm/internal.h 2009-09-15 17:32:27.000000000 +0100 @@ -37,6 +37,8 @@ static inline void __put_page(struct pag atomic_dec(&page->_count); } +extern unsigned long highest_memmap_pfn; + /* * in mm/vmscan.c: */ @@ -46,7 +48,6 @@ extern void putback_lru_page(struct page /* * in mm/page_alloc.c */ -extern unsigned long highest_memmap_pfn; extern void __free_pages_bootmem(struct page *page, unsigned int order); extern void prep_compound_page(struct page *page, unsigned long order); --- mm3/mm/memory.c 2009-09-15 17:32:19.000000000 +0100 +++ mm4/mm/memory.c 2009-09-15 17:32:27.000000000 +0100 @@ -108,6 +108,7 @@ static int __init disable_randmaps(char __setup("norandmaps", disable_randmaps); unsigned long zero_pfn __read_mostly; +unsigned long highest_memmap_pfn __read_mostly; /* * CONFIG_MMU architectures set up ZERO_PAGE in their paging_init() --- mm3/mm/page_alloc.c 2009-09-14 16:34:37.000000000 +0100 +++ mm4/mm/page_alloc.c 2009-09-15 17:32:27.000000000 +0100 @@ -72,7 +72,6 @@ EXPORT_SYMBOL(node_states); unsigned long totalram_pages __read_mostly; unsigned long totalreserve_pages __read_mostly; -unsigned long highest_memmap_pfn __read_mostly; int percpu_pagelist_fraction; gfp_t gfp_allowed_mask __read_mostly = GFP_BOOT_MASK; -- 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