On 12/15/18 12:03 AM, Mel Gorman wrote: > When compaction is finishing, it uses a flag to ensure the pageblock is > complete. However, in general it makes sense to always complete migration > of a pageblock. Minimally, skip information is based on a pageblock and > partially scanned pageblocks may incur more scanning in the future. The > pageblock skip handling also becomes more strict later in the series and > the hint is more useful if a complete pageblock was always scanned. > > The impact here is potentially on latencies as more scanning is done > but it's not a consistent win or loss as the scanning is not always a > high percentage of the pageblock and sometimes it is offset by future > reductions in scanning. Hence, the results are not presented this time as > it's a mix of gains/losses without any clear pattern. However, completing > scanning of the pageblock is important for later patches. > > Signed-off-by: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx> Acked-by: Vlastimil Babka <vbabka@xxxxxxx>
