On Fri, Jul 12, 2013 at 11:13 AM, Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:
> I also don't see it helping with the JIT stuff; you still need to write out a
> file with symbol information, we still need to find the file. A less hacky
> solution for the entire JIT thing is you writing a proper ELF-DSO and
> mmap()'ing that :-)
>
> Storing a JIT specific userspace pointer in the VMA doesn't help with any of
> that.
I'm thinking about corner cases like 'perf top' here. I don't see how we can
write out a ELF-DSO because the JIT compiler can generate new symbols
at any given time.
That's what made me think it'd be best for the _kernel_ to know about the
symbols so that perf could take advantage of that as well.
Pekka
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