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
Bug: 270386939
Change-Id: Id381316931a9cf6e7ea8b1ea7800c77f176c9892
Signed-off-by: Kalesh Singh <kaleshsingh@google.com>
(cherry picked from commit f57b7aab85987a79442a31bab09b8ac0fa2464ef)
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 8a6f647..d503bf4 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2714,9 +2714,6 @@
{
struct mem_cgroup *memcg = lruvec_memcg(lruvec);
- if (mem_cgroup_get_nr_swap_pages(memcg) < MIN_LRU_BATCH)
- return 0;
-
return mem_cgroup_swappiness(memcg);
}
