netdev - Re: [PATCH net-next] ipv4: tcp: dont cache unconfirmed intput dst

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Message-Id: <20120627.164418.1928194990434756968.davem@davemloft.net>
Date:	Wed, 27 Jun 2012 16:44:18 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	netdev@...r.kernel.org, hans.schillstrom@...csson.com
Subject: Re: [PATCH net-next] ipv4: tcp: dont cache unconfirmed intput dst


Eric, I think we need to make some adjustments after this change.

What happens now is that legitimate traffic is harmed too.  If we
really go to established state, we'll cache the DST_NOCACHE route
in sk->sk_rx_dst.

I've added logging to validate that this is in fact happening, it
triggers when I initially ssh into my machine.  The early demux route
we end up with has DST_NOCACHE set in it.
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