netdev - Re: softirq warnings when calling dev_kfree_skb_irq

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Message-Id: <20100803.002318.209965574.davem@davemloft.net>
Date:	Tue, 03 Aug 2010 00:23:18 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	johannes@...solutions.net
Cc:	jeremy@...p.org, netdev@...r.kernel.org, dongxiao.xu@...el.com,
	Xen-devel@...ts.xensource.com, Ian.Campbell@...rix.com,
	kaber@...sh.net, eric.dumazet@...il.com
Subject: Re: softirq warnings when calling dev_kfree_skb_irq - bug in
 conntrack?

From: Johannes Berg <johannes@...solutions.net>
Date: Tue, 03 Aug 2010 09:04:34 +0200

> I had this too:
> http://article.gmane.org/gmane.linux.network/167590
> 
> But I'm not convinced it's conntrack, I'd think it's
> 
> commit 15e83ed78864d0625e87a85f09b297c0919a4797
> Author: Eric Dumazet <eric.dumazet@...il.com>
> Date:   Wed May 19 23:16:03 2010 +0000
> 
>     net: remove zap_completion_queue
> 
> which, from the looks of it, ought to be reverted because it failed to
> take into account that dev_kfree_skb() can do more things that require
> non-irq-context than just calling skb->destructor, like for instance the
> conntrack thing we see here.

Agreed.  I'll revert this and queue that up for 2.6.35-stable
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