Hi Minchan,
2012/09/19 16:32, Minchan Kim wrote:
Hi Yasuaki,
On Wed, Sep 19, 2012 at 04:07:19PM +0900, Yasuaki Ishimatsu wrote:
Hi Bartlomiej,
2012/09/14 23:29, Bartlomiej Zolnierkiewicz wrote:
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").
I think the regression has been alreadly fixed by following Mincahn's patches.
https://lkml.org/lkml/2012/9/6/635
=> Hi Minchan,
Am I wrong?
This patch isn't related to mine.
According to the description, the regression occurs by clearing migratetype
info from page->private at __free_one_page(). If we apply your patches,
migratetype info is stored into page->index. So the migratetype info is not
cleared. Thus we do not need to cache the info locally.
Thanks,
Yasuaki Ishimatsu
In addition, this patch don't need to be a part of this series.
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