Re: [RFC] Restrict kernel spawning of threads to a specified set ofcpus.

[Mike Galbraith]

On Tue, 2013-09-10 at 09:05 +0300, Gilad Ben-Yossef wrote: 
> Hi,
> 
> On Thu, Sep 5, 2013 at 11:07 PM, Christoph Lameter <cl@xxxxxxxxx> wrote:
> > I am not sure how to call this kernel option but we need something like
> > that. I see drivers and the kernel spawning processes on the nohz cores.
> > The name kthread is not really catching the purpose.
> >
> > os_cpus=? highlatency_cpus=?
> >
> 
> First off, thank you for doing this. It is very useful :-)
> 
> Currently if one wishes to run a single task on an isolated CPU with
> as little interference as possible, one needs to pass
> rcu_nocbs, isolcpus, nohz_full parameters and now kthread parameter,
> all pretty much with the same values
> 
> I know some people won't like this, but can we perhaps fold all these
> into a single parameter, perhaps even the existing isolcpus?

isolcpus is supposed to go away, as cpusets can isolate CPUs, and can
turn off load balancing.

-Mike

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