Messages in this thread Patch in this message | | | From | Joonsoo Kim <> | Subject | [PATCH 08/10] mm/page_alloc: use get_onbuddy_migratetype() to get buddy list type | Date | Fri, 4 Jul 2014 16:57:53 +0900 |
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When isolating free page, what we want to know is which list the page is linked. If it is linked in isolate migratetype buddy list, we can skip watermark check and freepage counting. And if it is linked in CMA migratetype buddy list, we need to fixup freepage counting. For this purpose, get_onbuddy_migratetype() is more fit and cheap than get_pageblock_migratetype(). So use it.
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com> --- mm/page_alloc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index e1c4c3e..d9fb8bb 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -1597,7 +1597,7 @@ static int __isolate_free_page(struct page *page, unsigned int order) BUG_ON(!PageBuddy(page)); zone = page_zone(page); - mt = get_pageblock_migratetype(page); + mt = get_onbuddy_migratetype(page); if (!is_migrate_isolate(mt)) { /* Obey watermarks as if the page was being allocated */ -- 1.7.9.5
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