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Re: [PATCH/RFC] Reduce call chain length in netfilter (was: Re: do_IRQ:

To: Bart De Schuymer <bdschuym@xxxxxxxxxx>
Subject: Re: [PATCH/RFC] Reduce call chain length in netfilter (was: Re: do_IRQ: stack overflow: 872..)
From: Martin Josefsson <gandalf@xxxxxxxxxxxxxx>
Date: Sun, 23 Jan 2005 17:08:29 +0100
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>, shemminger@xxxxxxxx, dwmw2@xxxxxxxxxxxxx, ak@xxxxxxx, snort2004@xxxxxxx, bridge@xxxxxxxx, netdev@xxxxxxxxxxx, Rusty Russell <rusty@xxxxxxxxxxxxxxx>
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On Sun, 2005-01-23 at 13:40 +0100, Bart De Schuymer wrote:

> Hi Martin,

Hi Bart

> > I guess you never testcompiled with CONFIG_NETFILTER_DEBUG set :)
> Oops, no. I was imagining I could code that without error...
> There was another compile error with CONFIG_NETFILTER_DEBUG in the patch
> (skb that should have been (*pskb)) :(


> > > +                 if (verdict > NF_MAX_VERDICT) {
> > > +                         NFDEBUG("Evil return from %p(%u).\n",
> > > +                                 elem->hook, hook);
> > > +                         continue;
> > > +                 }
> > 
> > Maybe add unlikely() around the test?
> OK. I added another one around another debugging if-statement.

I'm now running a kernel with this patch and everything seems to still
be working.
So unless someone else has something to comment I think this should be
The decrease in call-depth is important.


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