Re: perf/jit doesn't cope well with mprotect() to jit containing pages

[Andres Freund]

On December 12, 2016 12:49:03 AM PST, Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:
>On Fri, Dec 09, 2016 at 09:02:18PM -0800, Andres Freund wrote:

>> Am I doing something wrong, or is there a bug here?
>
>Expected behaviour afaict

So I need to prevent vma  merging to use perf jit support? That seems a bit weird.  Possibly the inject --jit  pass needs to do something about this? A hack might be to re-emit  the fake mmap2 records after ones potentially overwriting previously emitted records.   Don't know perf internals well enough to suggest something prettier.

Andres
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