> are you talking about 'first_free' ?

No.

> > I mean

there is the code to handle the first gap specially only for
non-topdown case but

> > we don't need to search space in the gap between map start and
> > first entry in topdown (non-fixed mapping) case.

so, it would be ok.

btw, is the change in uvmspace_exec() really necessary?

enami.