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-rw-r--r--mm/vmpressure.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/mm/vmpressure.c b/mm/vmpressure.c
index b52644771cc4..22c6689d9302 100644
--- a/mm/vmpressure.c
+++ b/mm/vmpressure.c
@@ -244,6 +244,14 @@ void vmpressure(gfp_t gfp, struct mem_cgroup *memcg, bool tree,
if (mem_cgroup_disabled())
return;
+ /*
+ * The in-kernel users only care about the reclaim efficiency
+ * for this @memcg rather than the whole subtree, and there
+ * isn't and won't be any in-kernel user in a legacy cgroup.
+ */
+ if (!cgroup_subsys_on_dfl(memory_cgrp_subsys) && !tree)
+ return;
+
vmpr = memcg_to_vmpressure(memcg);
/*