The buildbot upgrade is entering the phase when the results to become visible.
No change is required at this time on any of the builders. The bot owners could upgrade the buildbot on build computers later, at their convenience, as this is not on the critical path.
We are going to upgrade the staging bot first. Then, once that is stable and all detected issues are resolved, we will upgrade the production bot.
I will need some help with testing, and will be asking to move some of the builders temporarily to the staging. LLVM buildbot is a piece of critical infrastructure, so more eyes and hands in making sure it works properly the better.
I'll be posting updates and ETA of particular changes in this thread.
Please feel free to ask if you have any questions or concerns.