On Mon, May 03, 2021 at 12:36:12PM -0500, madvenka@xxxxxxxxxxxxxxxxxxx wrote: > @@ -44,6 +44,8 @@ int notrace unwind_frame(struct task_struct *tsk, struct stackframe *frame) > unsigned long fp = frame->fp; > struct stack_info info; > > + frame->reliable = true; > + Why set 'reliable' to true on every invocation of unwind_frame()? Shouldn't it be remembered across frames? Also, it looks like there are several error scenarios where it returns -EINVAL but doesn't set 'reliable' to false. -- Josh