[PATCH] Optimize free_one_page
Free one_page currently adds the page to a fake list and calls
free_page_bulk. Fee_page_bulk takes it off again and then calles
__free_one_page.
Make free_one_page go directly to __free_one_page. Saves list on / off and
a temporary list in free_one_page for higher ordered pages.
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index e8a7165..cc64830 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -448,9 +448,11 @@
static void free_one_page(struct zone *zone, struct page *page, int order)
{
- LIST_HEAD(list);
- list_add(&page->lru, &list);
- free_pages_bulk(zone, 1, &list, order);
+ spin_lock(&zone->lock);
+ zone->all_unreclaimable = 0;
+ zone->pages_scanned = 0;
+ __free_one_page(page, zone ,order);
+ spin_unlock(&zone->lock);
}
static void __free_pages_ok(struct page *page, unsigned int order)