William Lee Irwin III wrote:
> 
> Paolo Ciarrocchi wrote:
> >> Hi all,
> >> I've just ran lmbench2.0 on my laptop.
> >> Here the results (again, 2.5.33 seems to be "slow", I don't know why...)
> 
> On Sat, Sep 07, 2002 at 09:20:56AM -0700, Andrew Morton wrote:
> > The fork/exec/mmap slowdown is the rmap overhead.  I have some stuff
> > which partialy improves it.
> 
> Hmm, Where does it enter the mmap() path? PTE instantiation is only done
> for the VM_LOCKED case IIRC. Otherwise it should be invisible.

Oh, is that just the mmap() call itself?

> Perhaps testing with overcommit on would be useful.

Well yes - the new overcommit code was a significant hit on the 16ways
was it not?  You have some numbers on that?
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