em watchdog problem

[Sam Leffler]

Jack Vogel wrote:
> This morning I had an idea about what the source of the watchdog
> problem is. Also, we have repro'd at least one type of watchdog
> inhouse.
>
> One question, is this problem only happening for those running
> STABLE with the 6.6.6 merged driver?
>
> We found the problem does not seem to happen on 7.0.
>
> Right now my suspicion is that the FAST irq handling is
> again causing a problem. I am experimenting with variations
> to the code today to be sure whats going on, and hopefully
> fixing it.
>   

I see it on HEAD and releng7.

    Sam