Re: [Lse-tech] [PATCH] cpusets - big numa cpu and memory placement

Simon Derr
2004-10-07T13:00:46Z

On Thu, 7 Oct 2004, Paul Jackson wrote:

> > I don't see what non-exclusive cpusets buys us.
>
> One can nest them, overlap them, and duplicate them ;)

I would also add, if the decision comes to make 'real exclusive' cpusets,
my previous example, as a use for non-exclusive cpusets:

we are running jobs that need to be 'mostly' isolated on some part of the
system, and run in a specific location. We use cpusets for that. But we
can't afford to dedicate a part of the system for administrative tasks
(daemons, init..). These tasks should not be put inside one of the
'exclusive' cpusets, even temporary : they do not belong there. They
should just be allowed to steal a few cpu cycles from time to time : non
exclusive cpusets are the way to go.