Re: [PATCH] mm: skip the page buddy block instead of one page

[Mel Gorman]

On Thu, Aug 15, 2013 at 10:19:35PM +0900, Minchan Kim wrote:
> > 
> > Why? We're looking for pages to migrate. If the page is free and at the
> > maximum order then there is no point searching in the middle of a free
> > page.
> 
> isolate_migratepages_range API works with [low_pfn, end_pfn)
> and we can't guarantee page_order in normal compaction path
> so I'd like to limit the skipping by end_pfn conservatively.
> 

Fine

s/MAX_ORDER_NR_PAGES/pageblock_nr_pages/

and take the min of it and

low_pfn = min(low_pfn, end_pfn - 1)

-- 
Mel Gorman
SUSE Labs
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/