> >HI, > >Please enable kprobe_event config option in the kernel and build the same > >and boot the board using it. Then please try to add event using perf probe > >command > > Thanks very much for your reply, and I already enable DEBUG_KPROBE_EVENT in > kernel. > I did success in "perf probe handle_mm_fault". > > But when i want to to "perf probe" other Kernel symbol, such as do_page_fault. > I came across other problems: > Added new event: > Failed to write event: Invalid argument > Error: Failed to add events. (-1) > And when i type perf probe page_fault_entry: > Kernel symbol 'page_fault_entry' not found. > Error: Failed to add events. (-2) > Please notice that "do_page_fault" and "page_fault_entry" are all Kernel > symbols, which canbe find in "/proc/kallsyms", but not recorgonized by perf > (or even kprobe). > Any idea for that?
For some reason, do_page_fault() is marked as __kprobe on some arch which means it cannot be probed. Thanks, Namhyung -- To unsubscribe from this list: send the line "unsubscribe linux-perf-users" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
