Re: FreeBSD 8.0 - network stack crashes?

On 8. jan. 2010, at 22.48, Rick Macklem wrote:
> On Fri, 8 Jan 2010, Eirik Ã~Xverby wrote:
> 
>> 
>> On 8. jan. 2010, at 16.33, Robert N. M. Watson wrote:
>>> On 30 Nov 2009, at 19:13, Eirik Øverby wrote:
>>> 
>>>> I meant NFS-UDP ... However I was wrong even there; Using NFS over UDP from FreeBSD boxes does not cause the same issue. So OpenBSD seems to be a special case here.
>>>> 
> As a data point, I tried to reproduce it here using an OpenBSD4.5 client and wasn't able to see a leak. So it might be only certain versions of
> OpenBSD or certain network configs or ??? (I used NFSv3 over UDP.)
> 
> I doubt it, but if the version of OpenBSD you were using happened to
> use NFSv2 by default with UDP vs NFSv3 for TCP, there is a patch that
> fixes an mbuf leak, that is specific to NFSv2. However, if you were
> using NFSv3 over UDP, then this won't be relevant.

10.1.5.200:/data/backup/alge.anart.no on /mnt type nfs (v3, tcp, timeo=100)
10.1.5.200:/data/backup/alge.anart.no on /mnt2 type nfs (v3, udp, timeo=100)

The first one is the mount I'm currently using (v3, tcp), which does not cause the problem.
The second one is the result of
  mount 10.1.5.200:/data/backup/alge.anart.no /mnt2
and it does, though it's OpenBSD 4.4, default to v3 udp.

I'll try gathering a trace next week. Any other ideas, let me know.

/Eirik

> I can look at a packet trace, but I kinda doubt that it's going to
> shed light on the cause of the mbuf leak.
> ("tcpdump -s 0 -w <file> host <server>" should get a packet capture
> that Wireshark will make sense of.)
> 
> rick
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