On Thu, Sep 06, 2012 at 03:13:08PM +0900, Kamezawa Hiroyuki wrote: > (2012/09/06 14:16), Minchan Kim wrote: > > The page allocator caches the pageblock information in page->private while > > it is in the PCP freelists but this is overwritten with the order of the > > page when freed to the buddy allocator. This patch stores the migratetype > > of the page in the page->index field so that it is available at all times > > when the page remain in free_list. > > > sounds reasonable. > > > This patch adds a new call site in __free_pages_ok so it might be > > overhead a bit but it's for high order allocation. > > So I believe damage isn't hurt. > > > > * from v1 > > * Fix move_freepages's migratetype - Mel > > * Add more kind explanation in description - Mel > > > > Signed-off-by: Minchan Kim <minc...@kernel.org> > > Hmm, page->index is valid only when the page is the head of buddy chunk ?
Yes. > > Anyway, > > Acked-by: KAMEZAWA Hiroyuki <kamezawa.hir...@jp.fujitsu.com> Thanks, Kame! -- Kind regards, Minchan Kim -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
