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Date:      Tue, 3 Jul 2001 13:53:43 -0700
From:      "Randy -Harborside Internet" <randymb@harborside.com>
To:        <freebsd-hardware@freebsd.org>, <freebsd-hackers@freebsd.org>
Cc:        "John Fox" <foxden@harborside.com>, "Jack Worrall" <worrall@harborside.com>
Subject:   TX buffer in 4.3
Message-ID:  <JMECKPIMOJNMLPBBEGBDGEGNCAAA.randymb@harborside.com>

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We are having a problem with our mail server. It recently got
upgraded to 4.3 from 4.2, and now it is having problems with the TX
buffer somehow on the network card. Every once in awhile it will shut
off all network traffic and give these errors:
no memory for tx listrl0
Then in a few minutes (presumably when the buffer is flushed somehow)
the network device resumes normal operation.
We have tried 3 different NICs, and all have had the same problem.
The three models were:
1. Realtek RTL8139A 10/100TX
2. Intel chipset:82558B
3. 3Com somethingerather. 

We are running with 512MB of RAM, and it usually has about 200 or
more megs free at the time of this occurance.

Is this a problem with the network drivers in 4.3? Or something else
that can be corrected? (Manual way to flush the network card
buffers??)
Here is the output of ulimit -a, just in case that helps.

core file size (blocks)     unlimited
data seg size (kbytes)      524288
file size (blocks)          unlimited
max locked memory (kbytes)  unlimited
max memory size (kbytes)    unlimited
open files                  65536
pipe size (512 bytes)       1
stack size (kbytes)         65536
cpu time (seconds)          unlimited
max user processes          531
virtual memory (kbytes)     589824

This is on a production system which supports around 10,000 users, so
any help would be appreciated.
Sincerely,

Randy McClelland-Bane
@Harborside Internet
1.866.435.3394 ext 409
469.8844 ext 409
Mobile 541.290-8849

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