Kelly O'Hair said the following on 03/11/11 09:00:
On Mar 10, 2011, at 2:50 PM, David Holmes wrote:
Lana Steuck said the following on 03/11/11 07:03:
On 03/10/2011 08:46 AM, Kelly O'Hair wrote:
Interesting point, we will need to decide which projects need jdk8 forests. I
imagine some will not, and we may be
doing a little trimming down on the number of team forests.
Makes sense. There are some team forests (at least one that I know of) that are
not being used, so we can look into removing those and maybe combining those
team forests which have more interdependencies into one forest (provided that
the team members agree).
I've never been a fan of the "all projects are complete forests". It just
increases the conceptual complexity of the repositories and the workload of keeping all
the forests sync'ed up. It should be easy to add additional repositories to a project as
the need arises, without requiring all repositories.
But all too often, regressions in one part of the forest only manifest
themselves when building the entire forest.
So it is the responsibility of the Developer and Integrator to insure the
entire forest builds and works prior
to integrations into the 'master' (jdk7/jdk7) forest.
Integrators are required to sync up with master, test build, and integrate the
entire forest, not partials.
Developers (other than those working on the build system) rarely build
forests. Hotspot engineers build hotspot, T&L engineers build jdk etc.
The team integrators certainly have to combine with the "master" forest
at the next level. But keeping a bunch of unmodified team repos up to
date with the "master" is just pure overhead.
Maybe hotspot needs a full forest (I don't think so), but certainly
hotspot_rt, hotspot_comp and hotspot_gc do not, in my opinion.
By having that full forest available for the team, you can at least be sure
that anyone on the team doing full
forest builds is dealing with the same sources.
Developers can choose to only use partials, that is certainly always possible.
If a team operates in such a way that full forest builds are needed then
the team will use a full forest. Most of the teams do not need that.
Having the forest just creates work for the gatekeeper.
I said all this when the forest of forests was first devised. As I said
never been a fan, don't see the need for it.
Cheers,
David
-kto
