This patch reset reclaim mode in shrink_active_list() to RECLAIM_MODE_SINGLE | RECLAIM_MODE_ASYNC. (sync/async sign is used only in shrink_page_list and does not affect shrink_active_list) Currenly shrink_active_list() sometimes works in lumpy-reclaim mode, if RECLAIM_MODE_LUMPYRECLAIM left over from earlier shrink_inactive_list(). Meanwhile, in age_active_anon() sc->reclaim_mode is totally zero. So, current behavior is too complex and confusing, all this looks like bug. In general, shrink_active_list() populate inactive list for next shrink_inactive_list(). Lumpy shring_inactive_list() isolate pages around choosen one from both active and inactive lists. So, there no reasons for lumpy-isolation in shrink_active_list() Proposed-by: Hugh Dickins <hughd@xxxxxxxxxx> Link: https://lkml.org/lkml/2012/3/15/583 Signed-off-by: Konstantin Khlebnikov <khlebnikov@xxxxxxxxxx> --- mm/vmscan.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/mm/vmscan.c b/mm/vmscan.c index 57d8ef6..ae83ca3 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -1690,6 +1690,8 @@ static void shrink_active_list(unsigned long nr_to_scan, lru_add_drain(); + reset_reclaim_mode(sc); + if (!sc->may_unmap) isolate_mode |= ISOLATE_UNMAPPED; if (!sc->may_writepage) -- 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>