Messages in this thread | | | Date | Mon, 6 Sep 2010 14:59:05 +0200 | From | Ingo Molnar <> | Subject | Re: disabling group leader perf_event |
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* Avi Kivity <avi@redhat.com> wrote:
> On 09/06/2010 03:43 PM, Ingo Molnar wrote: > > > > Yes. The filter engine is a safe, in-kernel interpreted language in > > the making. The C syntax was chosen because it's close to the heart > > of every kernel developer. > > > > It might make sense to bring this concept a few steps further. Looks > > rather complex but also rather cool ... > > Is this a roundabout way of saying "jit"?
Partly. I'm not sure we want to actually upload programs in bytecode form. ASCII is just fine - just like a .gz Javascript is fine for web apps. (and in most cases compresses down better than the bytecode equivalent)
So a clear language (the simpler initially the better) plus an in-kernel compiler.
This could be used for far more than just instrumentation: IMO security policies could be expressed in such a way. (Simplified, they are quite similar to filters installed on syscall entry/exit, with the ability of the filter to influence whether the syscall is performed.)
> If so, I'm all for it. I could use one myself.
Good ;-)
Thanks,
Ingo
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