On Thu, Jul 19, 2018 at 9:16 AM David Ahern <dsah...@gmail.com> wrote:
>
> Chatting with Nikolay about this and he brought up a good corollary - ip
> fragmentation. It really is a similar problem in that memory is consumed
> as a result of packets received from an external entity. The ipfrag
> sysctls are per namespace with a limit that non-init_net namespaces can
> not set high_thresh > the current value of init_net. Potential memory
> consumed by fragments scales with the number of namespaces which is the
> primary concern with making neighbor tables per namespace.

Nothing new, already discussed:
https://marc.info/?l=linux-netdev&m=140391416215988&w=2

:)
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