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authorJohannes Weiner <hannes@saeurebad.de>2008-05-23 13:04:21 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-05-24 09:56:07 -0700
commitf7232154198f928fc25f420d6190468212a7632a (patch)
tree3216938f94face00fd6c6094bc8ccb66c2ef3619
parentf899b0adc6fc8f60a9db8b52f36f06fd1abeaf7c (diff)
downloadop-kernel-dev-f7232154198f928fc25f420d6190468212a7632a.zip
op-kernel-dev-f7232154198f928fc25f420d6190468212a7632a.tar.gz
mm: don't drop a partial page in a zone's memory map size
In a zone's present pages number, account for all pages occupied by the memory map, including a partial. Signed-off-by: Johannes Weiner <hannes@saeurebad.de> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--mm/page_alloc.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 6383557..0353002 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -3378,7 +3378,8 @@ static void __paginginit free_area_init_core(struct pglist_data *pgdat,
* is used by this zone for memmap. This affects the watermark
* and per-cpu initialisations
*/
- memmap_pages = (size * sizeof(struct page)) >> PAGE_SHIFT;
+ memmap_pages =
+ PAGE_ALIGN(size * sizeof(struct page)) >> PAGE_SHIFT;
if (realsize >= memmap_pages) {
realsize -= memmap_pages;
printk(KERN_DEBUG
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