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    SubjectRe: [PATCH -rt DO NOT APPLY] Fix for tg3 networking lockup
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    From: Steven Rostedt <rostedt@goodmis.org>
    Date: Tue, 8 Aug 2006 08:24:10 -0400 (EDT)

    > Of the 4 timers, only one is a timeout. The other three expire every time,
    > forcing the timer wheel into effect. Even though it's one timer
    > implementing 4, it's expensive to use it as a watchdog.

    It's not a watchdog, the timer continually fires.

    It is the on-chip ASF firmware that "times out" if it does not
    see the heartbeat message from the driver within 5 seconds.

    The driver timer in question runs every 2 seconds to write this
    heartbeat message to the chip.
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