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Date:	Tue, 11 Sep 2007 11:10:11 -0700
From:	Rick Jones <>
To:	Sridhar Samudrala <>
Cc:	Eric Dumazet <>,
Subject: Re: [PATCH] include listenq max backlog in /proc/net/tcp	and	include
 in tcp_info

>>>>BTW, what do people think about doing the same thing with the rxqueue 
>>>>and txqueue's of netstat output?
>>>I dont understand this question, I thought your patch already handled this 
>>>(for the txqueue, since rxqueue is already there),  as netstat uses 
>>>/proc/net/tcp (unfortunatly)
>>Well, it doesn't seem to be the case.  This is from the same system as 
>>the ss output above:
>>hpcpc103:~# netstat -an | grep LISTEN
>>tcp        0      0*               LISTEN
>>tcp        0      0*               LISTEN
>>tcp        0      0*               LISTEN
>>tcp        0      0*               LISTEN
>>tcp6       0      0 :::22                :::*                    LISTEN
>>unix  2    [ ACC ]     STREAM   LISTENING   5666  /var/run/acpid.socket
>>I thought I saw some other code in there when I was stumbling around.
> Yes. netstat code seems to have a explicit check for TCP_LISTEN state
> and zeroing txq and rxq.
>>>From tcp_do_one() in netstat.c
>     if (state == TCP_LISTEN) {
>         time_len = 0;
>         retr = 0L;
>         rxq = 0L;
>         txq = 0L;
>     }

How terribly cheeky of them.  I wonder why they were doing that?

> We should fix this. Also i think it is a good idea to update netstat to use 
> INET_DIAG_INFO instead of /proc/net/tcp.

Since that is user space I went ahead and sent the updated kernel patch 
in a fresh thread.

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