Re: [PATCH 1/1] Implement shared page tables

[Arjan van de Ven]

> > Which is indeed a further disincentive against shared page tables.
> 
> Or shared pagetables a disincentive to randomizing the mmap space ;-)
> They're incompatible, but you could be left to choose one or the other
> via config option.
> 
> 3% on "a certain industry-standard database benchmark" (cough) is huge,
> and we expect the benefit for PPC64 will be larger as we can share the
> underlying hardware PTEs without TLB flushing as well.
> 

surely the benchmark people know that the database in question always
mmaps the shared area at the address where the first one started it?
(if not, could make it so ;)



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