netdev - Re: cannot set IP for ethernet

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Date:	Wed, 13 Jun 2007 13:55:27 +0200
From:	Oliver Neukum <oliver@...kum.org>
To:	Patrick McHardy <kaber@...sh.net>
Cc:	linux-kernel@...r.kernel.org,
	Linux Netdev List <netdev@...r.kernel.org>,
	Herbert Xu <herbert@...dor.apana.org.au>
Subject: Re: cannot set IP for ethernet

Am Mittwoch, 13. Juni 2007 schrieb Patrick McHardy:
> Oliver Neukum wrote:
> > Am Mittwoch, 13. Juni 2007 schrieb Patrick McHardy:
> >>>>
> >>>>This can happen if the initial inetdev allocation when the netdevice is
> >>>>registered fails. I think it would make sense to try to allocate again
> >>>>when adding addresses in that case, otherwise there is no way of
> >>>>recovery other than unregistering and registering the device again.
> >>>
> >>>
> >>>With your patch the problem has gone away. Is there a way to especially
> >>>stress the system in that regard?
> >>
> >>
> >>Its a failed allocation at NETDEV_REGISTER time. I guess you could
> >>keep unloading + reloading the driver module to try to reproduce it.
> > 
> > 
> > If that is the cause, why doesn't it strike from the very beginning? How
> > come it fails after some time?
> 
> 
> It might also be a failed in_ifaddr allocation. In that case my patch
> shouldn't help though.

The problem is that I don't know how to provoke the failure. I might
be doing another workload today than yesterday. Perhaps I should
do several compilations like yesterday?

	Regards
		Oliver

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