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Interesting machine lockup with 8139too driver.

To: "'netdev@xxxxxxxxxxx'" <netdev@xxxxxxxxxxx>
Subject: Interesting machine lockup with 8139too driver.
From: Ben Greear <greearb@xxxxxxxxxxxxxxx>
Date: Sat, 12 Apr 2003 13:33:05 -0700
Organization: Candela Technologies
Sender: netdev-bounce@xxxxxxxxxxx
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.3b) Gecko/20030210
I was beating my machine with 8139 NICs (and a slow CPU and only 128MB
RAM) by running a lot of UDP and TCP connections through it...  I usually
set my socket buffers quite large, so they may be consuming too much of
the vital kernel RAM.

After a while, I saw this repeated over and over on the console:

eth[01]:  Memory squeeze, dropping packet.

Now, that is the only thing I can see on this machine.  I cannot
get a bash prompt and changing virtual terminals does not work.

I did not see the OOM handler kick in, though it's possible it
scrolled off the screen.  At the least, it may be worthwhile to
throttle the squeeze messages...

As a caveat:  I'm running some of my own hacked up networking
code, and it's possible its leaking memory or doing something else
bad.  I have not seen this problem on my other machine with different
NIC (and faster CPU and more RAM), though.

Take it easy,

Ben Greear <greearb@xxxxxxxxxxxxxxx>       <Ben_Greear AT>
President of Candela Technologies Inc

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