On 2022-09-13 16:21:27 [-0300], Danilo Cezar Zanella wrote: > Hi Hi, > I'm getting the following error message when I set the current_tracer > to function_graph. Procedures: > > cd / sys/kernel/tracing > echo function_graph > current_tracer > > Then I saw the following message in the console. > > Unable to handle kernel paging request at virtual address fffffffc … > What is going on? > Am I doing something wrong? No, not as far I can tell. It looks like the function_graph tracer is busted in v4.19 even without the PREEMPT_RT patch. The function tracer seems to work. > Thanks > > Danilo Sebastian
