FreeBSD 11 Stable on a Xen :: bridge0 crashing server :: &ro

Andrey V. Elsukov bu7cher at
Fri Jan 20 19:57:25 UTC 2017

On 20.01.2017 21:10, SK wrote:
>>>> Note, I'm not a developer nor a committer, just a humble sysadmin.
>>> This problem is unrelated. ARP statistics is global and isn't related to
>>> some specific interface. IMHO, the kernel panics due to missing VNET
>>> context. As I see from the code in sys/dev/xen, it is not capable with
>> I cannot really look into this right now due to lack of time, but I'm
>> more than
>> happy to review/apply patches in order to fix this.
>> Roger.
> Further to my previous, since the provider of the VPS confirmed that
> they could run FreeBSD 10 and use bridge without any issue, I thought
> I'd have a look. The section from my crash-debug
> 0xffffffff80c2dd93 is in arprequest (/usr/src/sys/netinet/if_ether.c:427).
> 422             ro.ro_flags = 0;
> 423
> 424             m->m_flags |= M_BCAST;
> 425             m_clrprotoflags(m);     /* Avoid confusing lower layers. */
> 426             (*ifp->if_output)(ifp, m, &sa, &ro);
> 427             ARPSTAT_INC(txrequests);
> 428     }
> 429
> 430

Well, as I said, there is no VNET support in the sys/dev/xen.
It may work without problems even if you have compiled it with VIMAGE 
enabled. But it will crash just after you try to start some VNET-jail.
It is just not implemented yet.

WBR, Andrey V. Elsukov

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