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Date:	Tue, 6 Feb 2007 20:28:40 +0100
From:	Mattia Dongili <>
To:	Ingo Molnar <>
Cc:	Thomas Gleixner <>,
	Andrew Morton <>,,,,
Subject: Re: dynticks + iptables almost stops the boot process [was: Re: 2.6.20-rc6-mm3]

On Tue, Feb 06, 2007 at 05:48:26PM +0100, Ingo Molnar wrote:
> Mattia,
> * Mattia Dongili <> wrote:
> > > I have it halfways reproducible now and I'm working to find the root 
> > > cause. Thanks for providing the info.
> > 
> > Great, I'm obviously available to test any patch :)
> Could you try the patch below? The RCU serialization code (a rare call 
> but can be common in some types of setups) has a nasty implicit 
> dependency on the HZ tick - which until now was a hidden wart but became 
> an explicit bug under dynticks. Maybe this is what is slowing down your 
> box.

No, not this. Anyway the last patch Thomas forwarded does fix the

By the way, I have all the patches I received stacked up, if you want me
to test some different combination, just ask.

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