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Date:	Fri, 17 Oct 2014 14:19:24 -0700
From:	Eric Dumazet <>
To:	David Miller <>
Subject: Re: getaddrinfo slowdown in 3.17.1, due to getifaddrs

On Fri, 2014-10-17 at 12:30 -0400, David Miller wrote:

> Can I ask a serious question?  What is the synchronize_net() in AF_NETLINK
> exactly needed for?

__netlink_lookup() calls rhashtable_lookup_compare()

So you really want that any object found in this lookup respects
rcu grace period before being freed.

RCU contract is pretty clear about deletions of objects.

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