Builder update

[Kevin Fenzi]

On Wed, 28 Aug 2013 11:41:31 -0400
Colin Walters <walters at verbum.org> wrote:

> I think the most practical thing is to build version N of self-hosting
> systems using version N-1 (in addition to supporting building N with
> N). If you are using the latest to build the latest, you can more
> easily get into unstable states.
> 
> For example, if a new version of the Fedora kernel broke virtio-net,
> and you immediately upgrade the build VMs, then the system falls
> apart and requires manual system administrator intervention - you
> can't build a new fixed kernel.

Sure. 

For example, the builders should stay Fedora 19 until Fedora 20 is
officially released, then we will switch them to 20, etc. 

> Presumably version N-1 is more stable, although this is somewhat
> obviated by the Fedora kernel maintenance model of keeping all
> branches in sync.

We intend to re-install builders as needed, not during freezes and
probably in a rolling manner. So any breakage should be isolated to non
freeze windows. 

kevin

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