Messages in this thread | | | Date | Wed, 6 Oct 2004 10:42:51 +0200 | From | Colin Leroy <> | Subject | Re: Netconsole & sungem: hang when link down |
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On 06 Oct 2004 at 18h10, Benjamin Herrenschmidt wrote:
Hi,
> On Wed, 2004-10-06 at 16:39, Colin Leroy wrote: > > Hi, > > > > I noticed that, if you have netconsole set up and using a sungem > > card, and if the network cable is not plugged in, that the whole > > kernel hangs shortly after the "device not up yet, forcing it" > > netconsole message. I suspect this is due to the autoneg in sungem, > > but didn't have time to look further. > > > > Would you have any hints on the cause of this problem? > > 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).
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