From cdded861182142ac4488a4d64c571107aeb77f53 Mon Sep 17 00:00:00 2001 From: Kalesh Singh Date: Tue, 14 Feb 2023 14:17:57 -0800 Subject: [PATCH] ANDROID: MGLRU: Don't skip anon reclaim if swap low MGLRU tries to avoid doing unnecessary anon reclaim work if swap is low by checking if the available swap is less than the MIN_BATCH_SIZE (256kB). This can lead to unintened consequences where PSI pressure is less and LMKD doesn't wake up in time to avoid file cache thrashing. Remove this check to preserve the old bahavior. This can be improved later on once we have a low swap notification event from the kernel. Bug: 268574308 Change-Id: Id381316931a9cf6e7ea8b1ea7800c77f176c9892 Signed-off-by: Kalesh Singh --- mm/vmscan.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/mm/vmscan.c b/mm/vmscan.c index bfe260b0a91b..b25d8930e9af 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -3174,8 +3174,7 @@ static int get_swappiness(struct lruvec *lruvec, struct scan_control *sc) struct mem_cgroup *memcg = lruvec_memcg(lruvec); struct pglist_data *pgdat = lruvec_pgdat(lruvec); - if (!can_demote(pgdat->node_id, sc) && - mem_cgroup_get_nr_swap_pages(memcg) < MIN_LRU_BATCH) + if (!can_demote(pgdat->node_id, sc)) return 0; return mem_cgroup_swappiness(memcg);