[PATCH v4 1/4] mm: fix tracing in free_pcppages_bulk()
From: Bartlomiej Zolnierkiewicz <hidden>
Date: 2012-09-14 14:29:50
Subsystem:
memory management, memory management - page allocator, the rest · Maintainers:
Andrew Morton, Vlastimil Babka, Linus Torvalds
page->private gets re-used in __free_one_page() to store page order
(so trace_mm_page_pcpu_drain() may print order instead of migratetype)
thus migratetype value must be cached locally.
Fixes regression introduced in a701623 ("mm: fix migratetype bug
which slowed swapping").
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Michal Nazarewicz <redacted>
Acked-by: Minchan Kim <minchan@kernel.org>
Acked-by: Mel Gorman <mgorman@suse.de>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <redacted>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
---
mm/page_alloc.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 93a3433..e9da55c 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c@@ -668,12 +668,15 @@ static void free_pcppages_bulk(struct zone *zone, int count, batch_free = to_free; do { + int mt; + page = list_entry(list->prev, struct page, lru); /* must delete as __free_one_page list manipulates */ list_del(&page->lru); + mt = page_private(page); /* MIGRATE_MOVABLE list may include MIGRATE_RESERVEs */ - __free_one_page(page, zone, 0, page_private(page)); - trace_mm_page_pcpu_drain(page, 0, page_private(page)); + __free_one_page(page, zone, 0, mt); + trace_mm_page_pcpu_drain(page, 0, mt); } while (--to_free && --batch_free && !list_empty(list)); } __mod_zone_page_state(zone, NR_FREE_PAGES, count);
--
1.7.11.3
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