On 2020-09-25 11:57:15 [+0200], Aaron Marcher wrote: > Hi, Hi, > When using the same kernel version without PREEMPT_RT, the issue does > not occur. > > Do you have any hints for further debugging? > Thank you very much in advance. - try a later kernel (v5.9) - implement ->write_atomic() and make sure the output goes to printk_emergency() (so the output hits the uart right away). - enable lockdep and check what explodes. > Regards, > Aaron Marcher Sebastian
