On Mon, Aug 10, 2020 at 11:15:28PM +0300, Dmitry Osipenko wrote: > 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?
This would be equivalent to my patches. Problem with sysfs and debugfs remains as they don't have the option of GFP_NOWAIT. This needs to be moved outside of the locks. Best Regards, Michał Mirosław
