David Goldblatt ae23e5f426 Unify extent_alloc_wrapper with the other wrappers.
Previously, it was really more like extents_alloc (it looks in an ecache for an
extent to reuse as its primary allocation pathway).  Make that pathway more
explciitly like extents_alloc, and rename extent_alloc_wrapper_hard accordingly.
2019-12-20 10:18:40 -08:00
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