netdev - Re: [patch 11/11] netfilter warning fix

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Message-ID: <20070206123401.GA8052@elte.hu>
Date:	Tue, 6 Feb 2007 13:34:01 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
	kaber@...sh.net, dipankar@...ibm.com, paulmck@...ibm.com
Subject: Re: [patch 11/11] netfilter warning fix


* Andrew Morton <akpm@...ux-foundation.org> wrote:

> On Mon, 05 Feb 2007 18:44:08 -0800 (PST) David Miller 
> <davem@...emloft.net> wrote:
> 
> > I bet this rcu_read_lock()-implies-preempt_disable() assumption has 
> > spread into other areas of the tree as well.
> 
> Me too.  Although one expects that other holes will cause might_sleep 
> or lockdep warnings pretty easily.
> 
> Still, life is hard enough as it is.  I think I'll shelve rcu-preempt 
> pending resolution of this.

that was pretty much the only place in the whole kernel that got hit by 
some rcu-preempt side-effect - and even this appears to show that it's a 
real bug that was in hiding. So please dont shelve RCU-preempt for this 
reason :-)

	Ingo
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