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-rw-r--r--mm/vmscan.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c
index e83d2a74e942..bf3eedf0209c 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -3323,13 +3323,16 @@ void lru_gen_migrate_mm(struct mm_struct *mm)
if (mem_cgroup_disabled())
return;
+ /* migration can happen before addition */
+ if (!mm->lru_gen.memcg)
+ return;
+
rcu_read_lock();
memcg = mem_cgroup_from_task(task);
rcu_read_unlock();
if (memcg == mm->lru_gen.memcg)
return;
- VM_WARN_ON_ONCE(!mm->lru_gen.memcg);
VM_WARN_ON_ONCE(list_empty(&mm->lru_gen.list));
lru_gen_del_mm(mm);