10.08.2020 23:18, Michał Mirosław пишет: > 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.
Ah okay, you meant the debugfs core. I see now, thanks.