On Sat, Mar 13, 2010 at 1:41 AM, Mel Gorman <mel@xxxxxxxxx> wrote: > Ordinarily when a high-order allocation fails, direct reclaim is entered to > free pages to satisfy the allocation. With this patch, it is determined if > an allocation failed due to external fragmentation instead of low memory > and if so, the calling process will compact until a suitable page is > freed. Compaction by moving pages in memory is considerably cheaper than > paging out to disk and works where there are locked pages or no swap. If > compaction fails to free a page of a suitable size, then reclaim will > still occur. > > Direct compaction returns as soon as possible. As each block is compacted, > it is checked if a suitable page has been freed and if so, it returns. > > Signed-off-by: Mel Gorman <mel@xxxxxxxxx> > Acked-by: Rik van Riel <riel@xxxxxxxxxx> Reviewed-by: Minchan Kim <minchan.kim@xxxxxxxxx> At least, I can't find any fault more. :) -- Kind regards, Minchan Kim -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href