xl0: transmission error: 90

From: Ulrik Guenther (kpanic_at_00t.org)
Date: 04/15/05

  • Next message: Joel: "Re: RELENG_5 broken?" 
    Date: Fri, 15 Apr 2005 11:13:01 +0200
To: freebsd-stable@freebsd.org

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    Hi everyone,

    on my 5.4-RC1 installation with a 3com 3c905B NIC I got the following
    messages while transferring a big file (31GByte) over 100MBit ethernet:

    Apr 15 08:46:18 verleihnix kernel: xl0: transmission error: 90
    Apr 15 08:46:18 verleihnix kernel: xl0: tx underrun, increasing tx start
    threshold to 120 bytes
    Apr 15 08:46:18 verleihnix kernel: xl0: transmission error: 90
    Apr 15 08:46:18 verleihnix kernel: xl0: tx underrun, increasing tx start
    threshold to 180 bytes
    Apr 15 08:46:19 verleihnix kernel: xl0: transmission error: 90
    Apr 15 08:46:19 verleihnix kernel: xl0: tx underrun, increasing tx start
    threshold to 240 bytes
    Apr 15 08:46:19 verleihnix kernel: xl0: transmission error: 90
    Apr 15 08:46:19 verleihnix kernel: xl0: tx underrun, increasing tx start
    threshold to 300 bytes
    Apr 15 08:46:21 verleihnix kernel: xl0: transmission error: 90
    Apr 15 08:46:21 verleihnix kernel: xl0: tx underrun, increasing tx start
    threshold to 360 bytes
    Apr 15 08:47:29 verleihnix kernel: xl0: transmission error: 90
    Apr 15 08:47:29 verleihnix kernel: xl0: tx underrun, increasing tx start
    threshold to 420 bytes

    So, okay the threshold was increaed in 60byte steps from 120 to 420
    bytes, then it stopped. This procedure took place only during the first
    gigabytes of the transmission. I noticed no negative side effects (say:
    the file arrived completely on the other computer, checksum was okay as
    well). Transmission was done via SSH/SCP.

    Now my question: What do these messages from the xl(4) mean?

    Thanks in advance,

    Ulrik Guenther
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  • Next message: Joel: "Re: RELENG_5 broken?"

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