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

From: Christoph Lameter
Date: Fri Sep 13 2013 - 09:51:43 EST


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.

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