> > > |-bash---bash---xinit-+-XFree86
> > > | `-xfwm-+-xfce---gnome-terminal-+-bash---pstree
> > It doesn't matter how deep the tree is, on exec() all
> > previously shared page tables will be blown away.
> > In this part of the tree, I see exactly 2 processes
> > which could be sharing page tables (the two bash
> > processes).
> Sure, your point is that there is no problem and the speed of rmap on
> fork is not something to worry about?
No. The point is that we should optimise for fork()+exec(),
not for a long series of consecutive fork()s all sharing the
same page tables.
-- "Linux holds advantages over the single-vendor commercial OS" -- Microsoft's "Competing with Linux" document
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