Messages in this thread Patch in this message | | | From | Andy Whitcroft <> | Subject | [PATCH 3/3] lumpy: only count taken pages as scanned | Date | Mon, 12 Mar 2007 18:24:18 +0000 |
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When scanning the order sized area around the tag page we pull all pages of the matching active state; the non-matching pages are not otherwise affected. We currently count these as scanned increasing the apparent scan rates. Previously we would only count a page scanned if it was actually removed from the LRU, either then being reclaimed or rotated back onto the head of the LRU.
The effect of this is to cause reclaim to terminate artificially early when the scan count is reached, reducing effectivness. Move to counting only those pages we actually remove from the LRU as scanned.
Signed-off-by: Andy Whitcroft <apw@shadowen.org> Acked-by: Mel Gorman <mel@csn.ul.ie> --- diff --git a/mm/vmscan.c b/mm/vmscan.c index d7a0860..c3dc544 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -732,11 +732,11 @@ static unsigned long isolate_lru_pages(unsigned long nr_to_scan, /* Check that we have not crossed a zone boundary. */ if (unlikely(page_zone_id(cursor_page) != zone_id)) continue; - scan++; switch (__isolate_lru_page(cursor_page, active)) { case 0: list_move(&cursor_page->lru, dst); nr_taken++; + scan++; break; case -EBUSY: - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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