the src (hotspot) tree in graal

[Deneau, Tom]

I noticed when I run hg tags on graal, the most recent hs tag in there is hs25-b63

So if I wanted to find all the hotspot tree diffs introduced in graal , would it be correct to diff vs. jdk8/jdk8/hotspot, tag hs25-63?

How does the graal team manage the src (hotspot) tree when there is a new hotspot build?
Is there a mercurial repository somewhere which contains the graal hotspot on a branch from the regular hotspot to help with merges?

-- Tom