[llvm-dev] Managing buildbots through the Web UI

[Nemanja Ivanovic via llvm-dev]

I was under the impression that all I need to do in order to be able to
perform management tasks on the buildbots through the Web UI is to be
logged into GitHub with the same email as is listed for the buildbot admin.

I just tried that for https://lab.llvm.org/buildbot/#/builders/88 and I am
not able to cancel the queue nor cancel the current build. When I try to do
the former, it doesn't give me any output but doesn't cancel the queue.
When I try to do the latter, it gives me the following message:
Cannot Stop: you need to have role 'worker-owner'
How do I ensure I have that role?

Another strange thing is that the above mentioned buildbot seems to wait a
very long time (10-15 minutes) between when it finishes one build and when
it starts the next. Considering that builds on that bot take less than 10
minutes, that wait time means that the bot spend more than half its time
waiting rather than doing anything useful even though it has a lengthy
queue of requested builds.
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