While trying to use remote memcg charging in an out-of-tree kernel module
I found it's not working, because the current thread is a workqueue thread.
Signed-off-by: Zefan Li <lizefan@xxxxxxxxxx>
---
No need to queue this for v5.7 as currently no upstream users of this memcg
feature suffer from this bug.
---
mm/memcontrol.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index a3b97f1..db836fc 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -2802,6 +2802,8 @@ static void memcg_schedule_kmem_cache_create(struct mem_cgroup *memcg,
static inline bool memcg_kmem_bypass(void)
{
+ if (unlikely(current->active_memcg))
+ return false;
if (in_interrupt() || !current->mm || (current->flags & PF_KTHREAD))
return true;
return false;
--
2.7.4
