From 03f6462a3ae78f36eb1f0ee8b4d5ae2f7859c1d5 Mon Sep 17 00:00:00 2001 From: Hugh Dickins Date: Mon, 21 Sep 2009 17:03:35 -0700 Subject: [PATCH] mm: move highest_memmap_pfn 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 Cc: Rik van Riel Cc: KAMEZAWA Hiroyuki Cc: KOSAKI Motohiro Cc: Nick Piggin Cc: Mel Gorman Cc: Minchan Kim Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/internal.h | 3 ++- mm/memory.c | 1 + mm/page_alloc.c | 1 - 3 files changed, 3 insertions(+), 2 deletions(-) diff --git a/mm/internal.h b/mm/internal.h index 75596574911e..22ec8d2b0fb8 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -37,6 +37,8 @@ static inline void __put_page(struct page *page) 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 *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); diff --git a/mm/memory.c b/mm/memory.c index 9bdbd10cb418..b1443ac07c00 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -109,6 +109,7 @@ static int __init disable_randmaps(char *s) __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() diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 6877e22e3aa1..5717f27a0704 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -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; -- 2.34.1