Hi,
On Thu, 4 Apr 2013 01:28:34 +0800, OSDepend wrote:
>> On Tue, 2 Apr 2013 17:11:01 +0800, OSDepend wrote:
>> >> For some reason, do_page_fault() is marked as __kprobe on some arch
>> >> which means it cannot be probed.
>> >
>> > My kernel is runing on X86_64 arch, is there any chance for me to get the
>> > do_page_fault() entry/exit work?
>> nope, AFAIK.
> Is there any guide for us to decide which tracepoint (or other kernel symbol)
> canbe used, and which cannot?
> For some of the kallsyms cannot be used directly. Such as do_raw_spin_lock.
> perf probe -a test=do_raw_spin_lock
> Fatal: Kernel symbol 'do_raw_spin_lock' not found - probe not added.
Hmm.. it seems not, currently.
Maybe we can change perf to output the symbol was not able to be probed
after checking symbol address and it's between
__kprobes_text_{start,end}.
I'll take a look at it later.
Thanks,
Namhyung
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