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Message-id: <1353336169-23868-1-git-send-email-m.szyprowski@samsung.com>
Date: Mon, 19 Nov 2012 15:42:49 +0100
From: Marek Szyprowski <m.szyprowski@...sung.com>
To: linux-mm@...ck.org, linaro-mm-sig@...ts.linaro.org,
linux-kernel@...r.kernel.org
Cc: Marek Szyprowski <m.szyprowski@...sung.com>,
Kyungmin Park <kyungmin.park@...sung.com>,
Arnd Bergmann <arnd@...db.de>,
Andrew Morton <akpm@...ux-foundation.org>,
Mel Gorman <mel@....ul.ie>,
Michal Nazarewicz <mina86@...a86.com>,
Minchan Kim <minchan@...nel.org>,
Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
Francesco Lavra <francescolavra.fl@...il.com>
Subject: [PATCH] mm: cma: skip watermarks check for already isolated blocks in
split_free_page() fix
Cleanup and simplify the code which uses page migrate type.
Signed-off-by: Marek Szyprowski <m.szyprowski@...sung.com>
---
mm/page_alloc.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 6b990cb..f05365f 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1393,12 +1393,15 @@ int capture_free_page(struct page *page, int alloc_order, int migratetype)
zone = page_zone(page);
order = page_order(page);
+ mt = get_pageblock_migratetype(page);
- if (get_pageblock_migratetype(page) != MIGRATE_ISOLATE) {
+ if (mt != MIGRATE_ISOLATE) {
/* Obey watermarks as if the page was being allocated */
watermark = low_wmark_pages(zone) + (1 << order);
if (!zone_watermark_ok(zone, 0, watermark, 0, 0))
return 0;
+
+ __mod_zone_freepage_state(zone, -(1UL << order), mt);
}
/* Remove page from free list */
@@ -1406,10 +1409,6 @@ int capture_free_page(struct page *page, int alloc_order, int migratetype)
zone->free_area[order].nr_free--;
rmv_page_order(page);
- mt = get_pageblock_migratetype(page);
- if (unlikely(mt != MIGRATE_ISOLATE))
- __mod_zone_freepage_state(zone, -(1UL << order), mt);
-
if (alloc_order != order)
expand(zone, page, alloc_order, order,
&zone->free_area[order], migratetype);
--
1.7.9.5
--
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