On Tue, Sep 04, 2012 at 03:26:21PM +0200, Bartlomiej Zolnierkiewicz wrote:

page->private gets re-used in __free_one_page() to store page order

Please write down result of end-user by this bug.
"So trace_mm_page_pcpu_drain may print order instead of migratetype"

so 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>
Cc: Minchan Kim <minchan@kernel.org>
Cc: 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>

Acked-by: Minchan Kim <minchan@kernel.org>

-- 
Kind regards,
Minchan Kim

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