savecore: reboot after panic:

[Adrian Penisoara]

Hi,

On Tue, Mar 4, 2008 at 5:48 PM, Fratiman Vladut <vladone at spaingsm.com>
wrote:

> With *kgdb* , obtain this:
> Unread portion of the kernel message buffer:
> panic: vm_fault: fault on nofault entry, addr: e13d0000
> cpuid = 0
> Uptime: 1h8m8s
> Physical memory: 882 MB
> Dumping 63 MB: 48 32 16
>
> #0  doadump () at pcpu.h:195
> 195             __asm __volatile("movl %%fs:0,%0" : "=r" (td));
> (kgdb) Quit


Quite a short stack trace, not sure whether it helps.


>
>
> I use ipfw with dummynet because can use dynamically rules for shaping.
> With altq, need to put rule for every host, in order to share bandwith
> equal to all host in lan. If i have hundredth of host, this can be
> painful.
> This is why i use dummynet with ipfw.
>

You are probably referring to dummynet's mask classifier. I guess this would
be a good reason to attempt implementing similar mask classifiers into
pf(4).

Regards,
Adrian Penisoara
ROFUG / EnterpriseBSD


>
>
> Adrian Penisoara wrote:
> > Hi,
> >
> > On Mon, Mar 3, 2008 at 10:31 PM, Fratiman Vladut <vladone at spaingsm.com
> > <mailto:vladone at spaingsm.com>> wrote:
> >
> >     Hi!
> >     I try to implement some load balancing using pf. I use also ipfw for
> >     traffic shaping.
> >
> >
> > Have you tried to use traffic shaping with ALTQ inside pf ? Perhaps
> > there is a negative side-effect when combining ipfw and pf this way.
> >
> >
> >
> >     In pf.conf, my rules are this:
> >     nat on $ext_if1 from $lan_net to any -> ($ext_if1)
> >     nat on $ext_if2 from $lan_net to any -> ($ext_if2)
> >
> >     pass in on $int_if route-to { ($ext_if1 $ext_gw1), ($ext_if2
> >     $ext_gw2),
> >     ($ext_if2 $ext_gw2) } round-robin from $lan_net to any keep state
> >
> >     pass out on $ext_if1 route-to ($ext_if2 $ext_gw2) from $ext_if2 to
> any
> >     pass out on $ext_if2 route-to ($ext_if1 $ext_gw1) from $ext_if1 to
> any
> >
> >     All work fine, but after some time , my system reboot. I found with
> >     dmesg, this error:
> >     savecore: reboot after panic: vm_fault: fault on nofault entry,
> addr:
> >     e13d0000
> >     Mar  3 21:29:47 server savecore: reboot after panic: vm_fault:
> >     fault on
> >     nofault entry, addr: e13d0000
> >     savecore: writing core to vmcore.1
> >
> >
> > Have you tried to extract a gdb stack trace from the core file ? See
> > link below:
> >
> >
> http://www.freebsd.org/doc/en_US.ISO8859-1/books/developers-handbook/kerneldebug-gdb.html
> >
> > Regards,
> > Adrian Penisoara
> > ROFUG / EnterpriseBSD
>
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