Re: Netconsole & sungem: hang when link down

[Benjamin Herrenschmidt]

On Wed, 2004-10-06 at 18:42, Colin Leroy wrote:

> > Not sure, I suppose the driver is doing printk's with spinlocks held
> > from the autoneg stuff and there is a spinlock deadlock happening ...
> 
> Thanks. I'll look into this. If I'm not mistaken, I've got no way of
> catching it easily, do I ? CONFIG_DEBUG_SPINLOCK's help seems to say
> that I need NMI watchdog in order to catch deadlocks, which is only
> available on x86(_64).

Hrm... we have some sort of spinlock debugging, at least on ppc64...

BTW, did you have SMP or PREEMPT ? If none of these, then you should
not see any spin deadlock...

The solution is to look at the code though and find what's wrong :)

Ben.


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