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ANDROID: MGLRU: Don't skip anon reclaim if swap low

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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 <kaleshsingh@google.com>
This commit is contained in:
Kalesh Singh
2023-02-14 14:17:57 -08:00
committed by Treehugger Robot
parent 151bc21658
commit 26bac3f093
1 changed files with 1 additions and 2 deletions
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3
mm/vmscan.c
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@@ -3017,8 +3017,7 @@ 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);