commit "(mm/memcontrol:rewrite mem_cgroup_page_lruvec())" on mm tree use
mem_cgroup_lruvec to rewrite mem_cgroup_page_lruvec, but it missed a
DEBUG_VM warning as following, since we always charge a page before
return from allocation. Add back this warning is helpful:
VM_WARN_ON_ONCE_PAGE(!memcg, page);
Signed-off-by: Alex Shi <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: Shakeel Butt <[email protected]>
Cc: Roman Gushchin <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Yafang Shao <[email protected]>
Cc: Alexander Duyck <[email protected]>
Cc: Hui Su <[email protected]>
Cc: Wei Yang <[email protected]>
Cc: [email protected]
---
include/linux/memcontrol.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index 925b09ace986..7809020ef7bd 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -618,6 +618,7 @@ static inline struct lruvec *mem_cgroup_lruvec(struct
mem_cgroup *memcg,
goto out;
}
+ VM_WARN_ON_ONCE_PAGE(!memcg, page);
if (!memcg)
memcg = root_mem_cgroup;
--
2.29.GIT
