10.08.2020 23:09, Michał Mirosław пишет: > At first I also thought so, but there's more. Below is a lockdep > complaint with your patch applied. I did a similar patch and then two more > (following) and that is still not enough (sysfs/debugfs do allocations, > too).
Then it should be good to move the locking for init_coupling() like I suggested and use GFP_NOWAIT for the two other cases. It all could be a single small patch. Could you please check whether GFP_NOWAIT helps?