Subject: Re: [RFC PATCH net-next v3 1/4] netns: add genl cmd to add and get peer netns ids

From: ebiederm-aS9lmoZGLiVWk0Htik3J/[email-masked] (Eric W. Biederman)
Date: Thu, 02 Oct 2014 12:33:22 -0700

Nicolas Dichtel <[email-masked]> writes:

> With this patch, a user can define an id for a peer netns by providing a FD or a
> PID. These ids are local to netns (ie valid only into one netns).
>
> This will be useful for netlink messages when a x-netns interface is
> dumped.

You have a "id -> struct net *" table but you don't have a 
"struct net * -> id" table which looks like it will impact the
performance of peernet2id at scale.

Eric