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    Subjectsky2 hangs
    Hello,
    I have a sky2 network card in my intel mac mini. It stops working when I
    do havy network load like watching a divx over http/sshfs. However if I
    remove the driver module and load it again it works and even the tcp
    connection doesn't get shutdown. I automated the above procedure using
    a userland watchdog which basically does the same thing and is written
    entirely by me, because the traditional watchdog wasn't that reliable
    and did a lot of false positives:

    * Look every ten seconds if my default router is pingable (3
    pings, one has to get back).
    If it isn't the case I call network_fix script (it calls the
    script only once after a ping gets lost. To run the script again at least one
    ping has to arrive again)

    (mini) [~] cat /usr/local/sbin/fix_network
    #!/bin/bash

    export PATH=/bin:/usr/bin:/usr/sbin:/sbin

    rmmod sky2
    modprobe sky2
    ifdown eth0
    ifup eth0

    If after that no ping is received from the default
    router for another 90 seconds I tell init to reboot and
    stop feeding the kernel software watchdog.

    * My watchdog also checks if sshd process is running. If it is
    down for more than 100 seconds it reboots the machine, too.

    Jan 27 22:35:35 mini watchdog-tg[4146]: No PONG received from 192.168.0.3 (failure 1 of 10)
    Jan 27 22:35:35 mini watchdog-tg[4146]: Running fix_network script.
    Jan 27 22:38:46 mini watchdog-tg[4146]: No PONG received from 192.168.0.3 (failure 1 of 10)
    Jan 27 22:38:46 mini watchdog-tg[4146]: Running fix_network script.
    Jan 27 22:44:17 mini watchdog-tg[4146]: No PONG received from 192.168.0.3 (failure 1 of 10)
    Jan 27 22:44:17 mini watchdog-tg[4146]: Running fix_network script.
    Jan 29 12:00:13 mini watchdog-tg[4146]: No PONG received from 192.168.0.3 (failure 1 of 10)
    Jan 29 12:00:13 mini watchdog-tg[4146]: Running fix_network script.
    Jan 29 19:18:59 mini watchdog-tg[4146]: No PONG received from 192.168.0.3 (failure 1 of 10)
    Jan 29 19:18:59 mini watchdog-tg[4146]: Running fix_network script.
    Jan 31 15:56:29 mini watchdog-tg[4146]: No PONG received from 192.168.0.3 (failure 1 of 10)
    Jan 31 15:56:29 mini watchdog-tg[4146]: Running fix_network script.
    Feb 1 08:56:57 mini watchdog-tg[4146]: No PONG received from 192.168.0.3 (failure 1 of 10)
    Feb 1 08:56:57 mini watchdog-tg[4146]: Running fix_network script.

    I have a question to this: I wonder why the Linux Kernel (no longer?)
    increments the use counter of an ethernet driver (I saw it on sky2 and
    e1000) when the interface is up, running and configured? I can unload
    the sky2 driver without doing a 'ifconfig eth0 down' beforehand. Could
    somone provide me with background on this fact?

    With that everything works. If somone is interested in my userland
    watchdog, just send me an E-Mail.

    @Sam: I can provide you access to my hardware including root access via
    the wifi driver so that you can debug this network driver lockup, if you
    want to.

    Thomas
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