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From: Eric Dumazet <eric.dumazet@gmail.com>
To: Zhu Yi <yi.zhu@intel.com>
Cc: netdev@vger.kernel.org, "David S. Miller" <davem@davemloft.net>,
	Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>,
	"Pekka Savola (ipv6)" <pekkas@netcore.fi>,
	Patrick McHardy <kaber@trash.net>
Subject: Re: [PATCH V2 2/7] tcp: use limited socket backlog
Date: Wed, 03 Mar 2010 09:53:53 +0100	[thread overview]
Message-ID: <1267606433.2997.4.camel@edumazet-laptop> (raw)
In-Reply-To: <1267605389-7369-2-git-send-email-yi.zhu@intel.com>

Le mercredi 03 mars 2010 à 16:36 +0800, Zhu Yi a écrit :
> Make tcp adapt to the limited socket backlog change.
> 
> Cc: "David S. Miller" <davem@davemloft.net>
> Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
> Cc: "Pekka Savola (ipv6)" <pekkas@netcore.fi>
> Cc: Patrick McHardy <kaber@trash.net>
> Signed-off-by: Zhu Yi <yi.zhu@intel.com>
> ---
>  net/ipv4/tcp_ipv4.c |    6 ++++--
>  net/ipv6/tcp_ipv6.c |    6 ++++--
>  2 files changed, 8 insertions(+), 4 deletions(-)
> 
> diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
> index c3588b4..4baf194 100644
> --- a/net/ipv4/tcp_ipv4.c
> +++ b/net/ipv4/tcp_ipv4.c
> @@ -1682,8 +1682,10 @@ process:
>  			if (!tcp_prequeue(sk, skb))
>  				ret = tcp_v4_do_rcv(sk, skb);
>  		}
> -	} else
> -		sk_add_backlog(sk, skb);
> +	} else if (sk_add_backlog_limited(sk, skb)) {
> +		bh_unlock_sock(sk);
> +		goto discard_and_relse;
> +	}
>  	bh_unlock_sock(sk);
>  
>  	sock_put(sk);

So no counter is incremented to reflect this loss, sk->sk_drops (local
counter) or SNMP ?



  parent reply	other threads:[~2010-03-03  8:53 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-03-03  8:36 [PATCH V2 1/7] net: add limit for socket backlog Zhu Yi
2010-03-03  8:36 ` [PATCH V2 2/7] tcp: use limited " Zhu Yi
2010-03-03  8:36   ` [PATCH V2 3/7] udp: " Zhu Yi
     [not found]     ` <1267605389-7369-4-git-send-email-yi.zhu@intel.com>
2010-03-03  8:36       ` [PATCH V2 5/7] sctp: " Zhu Yi
2010-03-03  8:36         ` [PATCH V2 6/7] tipc: " Zhu Yi
2010-03-03  8:36           ` [PATCH V2 7/7] net: backlog functions rename Zhu Yi
2010-03-03 14:10         ` [PATCH V2 5/7] sctp: use limited socket backlog Vlad Yasevich
2010-03-03 14:19           ` Zhu, Yi
2010-03-03 14:36             ` Vlad Yasevich
2010-03-04  2:00               ` Zhu, Yi
2010-03-03  8:53   ` Eric Dumazet [this message]
2010-03-03  9:06     ` [PATCH V2 2/7] tcp: " Zhu Yi
2010-03-03 10:07       ` Eric Dumazet
2010-03-03 14:12         ` Zhu, Yi
2010-03-03 14:31           ` Eric Dumazet
2010-03-04  5:21             ` Zhu, Yi
2010-03-04  6:00               ` Eric Dumazet
2010-03-04 11:04                 ` Zhu, Yi
2010-03-04 14:56                   ` Eric Dumazet
2010-03-03  8:54 ` [PATCH V2 1/7] net: add limit for " David Miller
2010-03-03  9:01   ` Zhu Yi

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