[Bug 37680] Re: [Bug 37680] Re: nfs + vlan = kernel panic

[goldenear]

I don't have any backtrace of the kernel panic in my log any more. I 
have disable vlan two weeks ago, and since that, everything is ok.
I will repoduce the kernel panic at the end of the week (I don't wan't 
to hang the server when people are working on it ;) ).
Until then, I guess you can easily reproduce the "bug". I explain here 
my configuration :
Each nfs client uses a 100 Mbit Ethernet link to connect to a (VLAN 
featured) switch.
The switch uses a Gigabit Ethernet uplink to the server.
The server is a dhcp (dhcp3), dns (bind9) and nfs (kernel-nfs-server) 
server.
Each client can be on a diffirent subnet/VLAN depending the port it is 
connect to (at the moment port 1->12 : VLAN 21, port 13->24 : VLAN 22).
The Gigabit uplink carries all the VLANs to the server.
The server has the vlan package installed and is listening on eth0 
(default/untagged VLAN, 192.168.20.0/24), eth0.21 (VLAN 21, 
192.168.21.0/24) and eth0.22 (VLAN 22, 192.168.22.0/24).
The server also has an eth1 interface to connect to the internet (public 
IP).
/etc/exports contains only the line " /home/  
192.168.0.0/16(rw,sync,insecure)"

Now here is what happens :
1) if all the clients are on the default/untagged VLAN (eth0, 
192.168.20.0/24), the server crashes after a few hours.
2) if at least one client is on VLAN 21 or 22, the server crashes after 
a few minutes.

When I say the server crashes, sometimes it means Kernel Panic and 
sometimes it means freeze.

I hope this will help fixing the bug.If still useful,  I will try to 
send a backtrace of kernel panic as soon as possible (I have to 
reactivate VLANs on the server to make it crashes first).

Regards.
Nicolas




Colin Watson a écrit :

>Can you attach the backtrace of the kernel panic (you'll probably find it in /var/log/syslog) to this bug, please?
>
>** Changed in: Ubuntu
>Sourcepackagename: None => linux-source-2.6.15
>
>** Changed in: linux-source-2.6.15 (Ubuntu)
>       Status: Unconfirmed => Needs Info
>  
>

-- 
nfs + vlan = kernel panic
https://launchpad.net/malone/bugs/37680