On Mon, 2 Dec 2019 15:31:52 -0800 Matthew Garrett <mjg59@xxxxxxxxxx> wrote: > On Fri, Nov 1, 2019 at 2:08 PM dann frazier <dann.frazier@xxxxxxxxxxxxx> wrote: > > > [ 1.763630] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7 > > This is expected. > > > [ 2.913934] ------------[ cut here ]------------ > > [ 2.918435] Could not register function stat for cpu 0 > > [ 2.923717] WARNING: CPU: 1 PID: 1 at kernel/trace/ftrace.c:987 ftrace_init_tracefs_toplevel+0x168/0x1bc > > This is not. I'll look into it. I think it has to do with ftrace triggering WARN_ON() if it fails to create files. We don't want this to happen if it fails because of lockdown. I'm already looking into it. Thanks! -- Steve
