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Date:      Sat, 18 Aug 2001 12:04:21 -0400
From:      Jan Knepper <jan@digitaldaemon.com>
To:        FreeBSD ISP <FreeBSD-ISP@FreeBSD.org>
Subject:   slashdotted: /kernel: xl0: no memory for rx list -- packet dropped!
Message-ID:  <3B7E9205.7010604@digitaldaemon.com>

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Hi!

Last Thursday one of the sites I host got slashdotted 
(http://www.slashdot.com/) and amazingly FreeBSD 4.3 on PIII 600 Mhz 
with 128 MB RAM took the load gracefully. I.e. until around 5 PM EST 
when I got messages like:

/kernel: xl0: no memory for rx list -- packet dropped!

at the console...

So what I did is, I terminated some of the daemon's that were not really 
used as a couple of httpd server, etc. This seemed to solve the problem, 
however... When I run a netstat -na right now I get the impression that 
there is still some garbadge in memory from this experience:

As:
tcp4       0  15360  63.105.9.61.20         217.80.179.220.2822    LAST_ACK
tcp4       0  15360  63.105.9.61.20         193.219.43.81.2591     LAST_ACK
tcp4       0  15360  63.105.9.61.20         200.11.220.5.2535      LAST_ACK
tcp4       0  15360  63.105.9.61.20         200.11.220.5.1736      LAST_ACK
tcp4       0  15360  63.105.9.61.20         200.11.220.5.1735      LAST_ACK
tcp4       0  15360  63.105.9.61.20         202.133.131.44.3651    LAST_ACK
tcp4       0  15360  63.105.9.61.20         193.124.148.213.4486   LAST_ACK
tcp4       0  15360  63.105.9.61.20         193.124.148.213.4338   LAST_ACK
tcp4       0  15360  63.105.9.61.20         193.124.148.213.3452   LAST_ACK
tcp4       0  15360  63.105.9.61.20         193.124.148.213.3449   LAST_ACK
tcp4       0  15360  63.105.9.61.20         193.124.148.213.1825   LAST_ACK
tcp4       0  15360  63.105.9.61.20         193.124.148.213.2922   LAST_ACK
tcp4       0  15360  63.105.9.61.20         193.124.148.213.2390   LAST_ACK
tcp4       0  15360  63.105.9.61.20         193.124.148.213.2310   LAST_ACK
tcp4       0  15360  63.105.9.61.20         193.124.148.213.1598   LAST_ACK
tcp4       0  15360  63.105.9.61.20         193.124.148.213.1597   LAST_ACK
tcp4       0  15360  63.105.9.61.20         193.124.148.213.1556   LAST_ACK
tcp4       0  15360  63.105.9.61.20         193.124.148.213.1553   LAST_ACK
tcp4       0  15360  63.105.9.61.20         203.195.181.4.1440     LAST_ACK

I am sure this has been in there the last at least 24 hours and I can 
see nothing is happening. I suspect that this is because of the no 
memory for rx list, but I am not quite sure. I was kinda a cool feeling 
though that FreeBSD didn't give up, but still runs!!!

Is there anyway to clean this up without having to reboot the system?

Thanks!
Jan



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