Re: A tale of systemd and MaxProcs

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On Sun, Sep 25, 2016 at 01:11:16PM -0600, Kevin Fenzi wrote:
> On Sun, 25 Sep 2016 16:54:45 -0000
> "Timothy Ward" <gtwa001@xxxxxxxxx> wrote:
> 
> > Although I agree with the above then may be a builder should have a
> > rawhide VM running with these updated critical packages if only for
> > testing purposes to expose this type of failure. 
> 
> Sure, as I noted perhaps we should move some of the staging ones to
> branched or rawhide. But thats just the start/easy part. Then someone
> has to watch for failed builds, sort out which ones are caused by
> package error or other packages or whatever and find the few caused by
> the builder state and track them down. 
> 
> So, basically it's this problem x N. I personally don't have many free
> hours a week to devote to this, and I doubt the kernel maintainers do
> either. :) 
> 
> > The other concerns is that the package should have issued some sort
> > of critical error message to the appropriate log before the limit was
> > reached. and then start shutting down or limiting the process's or
> > threads running. Is easy to say but may be a lot harder to actually
> > achieve.
> 
> Yep. Would be nice, not sure how hard it is to do. 
>  
> > Although the change was communicated there needs to be a process that
> > effective communication of these sorts of changes is sent to ensure
> > that it will be picked up by more than just the fedora team leader
> > which already has a fairly big workload.
> 
> Well, the change was communicated only in the NEWS file burried in
> a bunch of other changes. 
> > 
> > It is a corner case at the extreme end as most testers probably would
> > not have the hardware or knowledge to test effectively. Supplying
> > info on how to test effectively may be a solution but will require
> > someone to do it.
> > 
> > But I feel Kevin's and others involved frustration and the amount of
> > time that trouble-shooting this would have taken.
> 
> Yeah, I just want to try and improve things so perhaps it doesn't
> happen again/as much/as soon. 

Ack. I run a lot of builds on rawhide, but none of my systems is large
enough to hit such issues. From my side I'll try to watch out for
changes in systemd and that change resource or privilege limitations
that could affect large systems.

Zbyszek
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