Re: [PATCH]: exec: avoid propagating PF_NO_SETAFFINITY intouserspace child

[Peter Zijlstra]

On Thu, Nov 28, 2013 at 04:00:55PM +0100, Oleg Nesterov wrote:
> And btw. Note ____call_usermodehelper()->set_cpus_allowed_ptr(cpu_all_mask).
> 
> Even if we change the affinity of the "khelper" worker threads this
> won't restrict the user-space helpers.
> 
> I think this set_cpus_allowed_ptr() should die in any case?

Yes. A while back someone proposed adding a magic cpumask to tweak in
order to contain the usermode helpers.

Obviously I thought that was a bad idea.
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