Re: [pcp] pmcd restart race condition

[Ken McDonell <kenj@xxxxxxxxxxxxxxxx>]

On 06/10/15 10:36, Nathan Scott wrote:
> ...
> The problem was reported by someone who wanted to be able to spin up VMs
> quickly, which were preconfigured to have pmcd installed and a (at least
> one) custom PMDA which had a slow Install.  For some reason they couldn't
> make the Install faster, it was impractical for them to pre-configure the
> PMDA (namespace install, etc) because of the way they prepared the system
> images & Install was measured as being the longest part of their instance
> bootup (10 - 20 seconds IIRC).
>
> Since we have in-tree PMDAs with long check_delay ./Install settings too,
> this seemed like something we should be doing in the background anyway.
I would question if PCP is important, why is so important to get pmcd 
running with only some of the relevant PMDAs installed, however ...
I've re-audited the rc script, and with some minor re-ordering of tasks 
near the end of the "start" action, I have something that I now believe 
is safe to run _pmda_setup in the background again.
This passes qa -g pmcd on one machine for me, so I'm going to commit it 
shortly.