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SubjectRe: [PATCH 00/18] xfrm: Add compat layer
Dmitry Safonov <dima@arista.com> wrote:
> 1. It will double copy netlink messages, making it O(n) instead of
> O(1), where n - is number of bind()s.. Probably we don't care much.

About those bind() patches, I don't understand why they are needed.

Why can't you just add the compat skb to the native skb when doing
the multicast call?

skb_shinfo(skb)->frag_list = compat_skb;
xfrm_nlmsg_multicast(net, skb, 0, ...

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