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

[Frederic Weisbecker]

On Fri, Sep 13, 2013 at 01:45:55PM +0000, Christoph Lameter wrote:
> On Thu, 12 Sep 2013, Frederic Weisbecker wrote:
> 
> > So yeah it's a problem in theory. Now in practice, I have yet to be convinced because
> > this should be solved after a few iterations in /proc in most cases.
> 
> I have seen some drivers regularly spawning threads all over the machnine.
> This is a practical issue that I am addresing.
> >
> > Now the issue doesn't only concern kthreads but all tasks in the system.
> > If we really want to solve that race, then may be we can think of a kernel_parameter
> > that sets the initial affinity of init and then lets get it naturally inherited
> > through the whole tree.
> 
> This patch that we are discussing does exactly that.
> 

Indeed, I just looked that again and your cpu_kthread_mask actually also applies to init.
cpu_init_mask would be a better name I think.
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