Messages in this thread | | | Date | Tue, 08 Aug 2006 15:00:06 -0700 (PDT) | Subject | Re: [PATCH -rt DO NOT APPLY] Fix for tg3 networking lockup | From | David Miller <> |
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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. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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