diff options
| author |   Hugh Dickins <hugh.dickins@tiscali.co.uk> | 2009-09-21 17:03:35 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-22 07:17:41 -0700 |
| commit | 03f6462a3ae78f36eb1f0ee8b4d5ae2f7859c1d5 (patch) | |
| tree | bf19c5019705796e90ef592233aca5f09025a92f | |
| parent | mm: ZERO_PAGE without PTE_SPECIAL (diff) | |
| download | linux-dev-03f6462a3ae78f36eb1f0ee8b4d5ae2f7859c1d5.tar.xz linux-dev-03f6462a3ae78f36eb1f0ee8b4d5ae2f7859c1d5.zip | |
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 <hugh.dickins@tiscali.co.uk>
Cc: Rik van Riel <riel@redhat.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Nick Piggin <npiggin@suse.de>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Minchan Kim <minchan.kim@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | mm/internal.h | 3 | ||||
| -rw-r--r-- | mm/memory.c | 1 | ||||
| -rw-r--r-- | 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; |