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

[Eric W. Biederman]

Nicolas Dichtel <nicolas.dichtel@xxxxxxxxx> 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
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