Messages in this thread Patch in this message | | | From | Minchan Kim <> | Subject | [RFC 5/6] mm: reclaim lazyfree pages in swapless system | Date | Fri, 14 Mar 2014 15:37:49 +0900 |
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If there are lazyfree pages in system, shrink inactive anonymous LRU to discard lazyfree pages regardless of existing avaialable swap.
Signed-off-by: Minchan Kim <minchan@kernel.org> --- mm/vmscan.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/mm/vmscan.c b/mm/vmscan.c index 98a1c3ffcaab..ad73e053c581 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -1889,8 +1889,13 @@ static void get_scan_count(struct lruvec *lruvec, struct scan_control *sc, if (!global_reclaim(sc)) force_scan = true; - /* If we have no swap space, do not bother scanning anon pages. */ - if (!sc->may_swap || (get_nr_swap_pages() <= 0)) { + /* + * If we have no swap space and lazyfree pages, + * do not bother scanning anon pages. + */ + if (!sc->may_swap || + (get_nr_swap_pages() <= 0 && + zone_page_state(zone, NR_LAZYFREE_PAGES) <= 0)) { scan_balance = SCAN_FILE; goto out; } -- 1.9.0
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