netdev - Re: BUG: scheduling while atomic: ifconfig/0x00000002/4170

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Message-Id: <1189082685.28781.70.camel@johannes.berg>
Date:	Thu, 06 Sep 2007 14:44:45 +0200
From:	Johannes Berg <johannes@...solutions.net>
To:	Herbert Xu <herbert@...dor.apana.org.au>
Cc:	satyam@...radead.org, flo@...822.org, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org, linux-wireless@...r.kernel.org,
	michal.k.k.piotrowski@...il.com,
	ipw3945-devel@...ts.sourceforge.net, yi.zhu@...el.com,
	flamingice@...rmilk.net
Subject: Re: BUG: scheduling while atomic: ifconfig/0x00000002/4170

On Thu, 2007-09-06 at 20:36 +0800, Herbert Xu wrote:
> Johannes Berg <johannes@...solutions.net> wrote:
> >
> > Hah, I suspected as much but didn't have a chance to look yet. I had
> > plans to replace that sub_if_list with an RCU list and not require the
> > lock there, but that's far off. Any ideas how to fix this? We can't
> > reject the master stop so we have to walk the list, I guess we'll have
> > to audit the other list manipulation places, I think they're all under
> > RTNL.
> 
> Yeah I think they're all under RTNL too.  So you don't need to
> take the lock here at all since you should already have the RTNL.

I'll take a look at them and post appropriate patches.

johannes

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