Currently we scan all cgroups and shrink active list when inactive list is to low. It might be better to reclaim only inactive pages from cgroups that have big enough inactive lru and fallback to active only if all inactive lrus are too small.
https://pmc.acronis.com/browse/VSTOR-19037 Signed-off-by: Andrey Ryabinin <aryabi...@virtuozzo.com> --- mm/vmscan.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/mm/vmscan.c b/mm/vmscan.c index f64c8775ac9e..2ba4a11a67f7 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -2043,12 +2043,15 @@ static unsigned long shrink_list(enum lru_list lru, unsigned long nr_to_scan, struct scan_control *sc) { if (is_active_lru(lru)) { - if (inactive_list_is_low(lruvec, is_file_lru(lru), memcg, true)) + if (sc->may_thrash && inactive_list_is_low(lruvec, + is_file_lru(lru), memcg, true)) shrink_active_list(nr_to_scan, lruvec, sc, lru); return 0; } - - return shrink_inactive_list(nr_to_scan, lruvec, sc, lru); + if (sc->may_thrash || !inactive_list_is_low(lruvec, is_file_lru(lru), + memcg, false)) + return shrink_inactive_list(nr_to_scan, lruvec, sc, lru); + return 0; } #ifdef CONFIG_MEMCG -- 2.19.2 _______________________________________________ Devel mailing list Devel@openvz.org https://lists.openvz.org/mailman/listinfo/devel
