The idea in 9ff473b 'vmscan: evict streaming IO first' was to steer reclaim focus onto file pages with every new file page that hits the lru list, so that an influx of used-once file pages does not lead to swapping of anonymous pages. The problem is that nobody is fixing up the balance if the pages in fact become part of the resident set. Anonymous page creation is neutral to the inter-lru balance, so even a comparably tiny number of heavily used file pages tip the balance in favor of the file list. In addition, there is no refault detection, and every refault will bias the balance even more. A thrashing file working set will be mistaken for a very lucrative source of reclaimable pages. As anonymous pages are no longer swapped above a certain priority level, this mechanism is no longer needed. Used-once file pages should get reclaimed before the VM even considers swapping. Signed-off-by: Johannes Weiner <jweiner@xxxxxxxxxx> --- mm/swap.c | 1 - 1 files changed, 0 insertions(+), 1 deletions(-) diff --git a/mm/swap.c b/mm/swap.c index 3a442f1..33e5387 100644 --- a/mm/swap.c +++ b/mm/swap.c @@ -683,7 +683,6 @@ static void ____pagevec_lru_add_fn(struct page *page, void *arg) SetPageLRU(page); if (active) SetPageActive(page); - update_page_reclaim_stat(zone, page, file, active); add_page_to_lru_list(zone, page, lru); } -- 1.7.6.4 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>