Re: [PATCH 3/3] perf tools: Make 'struct map_shared' truly shared

[Andi Kleen]

> > We may need a COW operation for this (hopefully rare) case.
> 
> so the jitted mmaps are inserted into the data file
> and processed during report where they can overload
> existing maps - thats detected before addition in:
> 
>   thread__insert_map
>     map_groups__fixup_overlappings
>       - which uses COW way -> map__clone(map, false);
>         to create new map
> 
> other fixups to maps are being done only for kernel maps,
> where we dont have a problem, because there's only one copy

I assume the same is true for /tmp/perf-* processing?

Thanks for looking into it.



-Andi