Re: help reproduce or fix this ipmasq / ip_forward problem
Brian Ristuccia (brianr@osiris.ml.org)
Thu, 3 Dec 1998 11:48:46 -0500
On Thu, Dec 03, 1998 at 01:09:56PM +1130, Paul Rusty Russell wrote:
> In message <19981201215127.A989@impsat1.com.ar> you write:
> > [from OTHER mail...]
> > > EIP is c016ee64
>
> The backtrace is corrupted so I'm not convinced this is valid; I think
> something's smashing the stack after cleanup(). But I don't have an
> SMP machine to test.
>
> Perhaps smp_num_cpus is not yet correct during the ip_fw_init() call.
> What do you get during boot if you apply this patch:
>
> --- linux/net/ipv4/ip_fw.c.~1~ Tue Oct 13 14:02:32 1998
> +++ linux/net/ipv4/ip_fw.c Thu Dec 3 13:04:22 1998
> @@ -1685,6 +1685,7 @@
> fwc_wlocks = fwc_rlocks = 0;
> #endif
>
> + printk("Number of cpus = %i.\n", smp_num_cpus);
> IP_FW_INPUT_CHAIN = ip_init_chain(IP_FW_LABEL_INPUT, 1, FW_ACCEPT);
> IP_FW_FORWARD_CHAIN = ip_init_chain(IP_FW_LABEL_FORWARD, 1, FW_ACCEPT);
> IP_FW_OUTPUT_CHAIN = ip_init_chain(IP_FW_LABEL_OUTPUT, 1, FW_ACCEPT);
>
> If this prints 1, that's the problem.
It's very possible that this routine is getting wrong information. My linux
box has two CPU's, but they're numbered 0 and 4 for some reason. I will
apply the patch this afternoon and try again.
>
> In need of an SMP box... and a sparc...
> Rusty.
> --
> .sig lost in the mail.
--
Brian Ristuccia
brianr@osiris.ml.org
bristucc@baynetworks.com
bristucc@cs.uml.edu
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