netdev - Re: [PATCH net 4/4] tcp: various missing rcu_read_lock around __sk_dst

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Date:	Thu, 31 Mar 2016 16:39:55 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Hannes Frederic Sowa <hannes@...essinduktion.org>
Cc:	davem@...emloft.net, netdev@...r.kernel.org,
	sasha.levin@...cle.com, daniel@...earbox.net,
	alexei.starovoitov@...il.com, mkubecek@...e.cz
Subject: Re: [PATCH net 4/4] tcp: various missing rcu_read_lock around
 __sk_dst_get

On Fri, 2016-04-01 at 01:29 +0200, Hannes Frederic Sowa wrote:
> Various fixes which were discovered by this changeset. More probably
> to come...


Really ?

Again, TCP stack locks the socket most of the time.

The fact that lockdep does not understand this is not a reason to add
this overhead.