Re: [PATCH net-next v3] net: ipv4: add support for ECMP hash policy choice

On Wed, 15 Mar 2017 09:01:16 -0600
David Ahern [off-list ref] wrote:

On 3/15/17 3:17 AM, Nicolas Dichtel wrote:

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Is there another patch to add the NETCONFA_ECMP support?
 

does userspace care?  

Yes, I think it is needed so that userspace can correctly monitor this behavior.
It also enables to check this parameter through netlink.
  

I don't understand why userspace cares. What can userspace do with that
information?

There are cases such as routing or switch control from userspace where the desire
is to track kernel behavior in an external program. I know of at least 3 cases where
this is done.