Running BIRD 1.3.4 on custom config Linux 3.8.13 kernel

[Bao Nguyen]

Ondrej,

You are correct, the issue is not related to OSPF but related to BIRD's
ability to install a route into the kernel routing table. It look like the
issue was that the new kernel doesn't have this option enabled (which is
hidden under the Kernel Wireless options)

CONFIG_COMPAT_NETLINK_MESSAGES=y

Enabling this option fixes the issue we were seeing. Reading up on this [1]
it seemed it's an very old mode.

"This option makes it possible to send different netlink messages to tasks
depending on whether the task is a compat task or not. To achieve this, you
need to set skb_shinfo(skb)->frag_list to the compat skb before sending the
skb, the netlink code will sort out which message to actually pass to the
task.

Newly written code should NEVER need this option but do compat-independent
messages instead!"



[1] http://cateee.net/lkddb/web-lkddb/COMPAT_NETLINK_MESSAGES.html


-bn
0216331C


On Wed, May 22, 2013 at 1:48 AM, Ondrej Zajicek <santiago at crfreenet.org>
wrote:
>
> On Mon, May 20, 2013 at 04:36:02PM -0700, Bao Nguyen wrote:
> > We testing BIRD on a custom 3.8.13 Linux kernel and seeing this message
> > every 20 seconds. We did not see this on 3.2 kernel release by Ubuntu
12.04
> > LTS release. Is there any chance that there's a kernel config that's
needed
> > by BIRD that we are not aware of? I notice that the "wait 20" is the
only
> > time that matches this interval in the log...
>
> I don't think the issue is related to OSPF, that would be strange. Most
> probably to kernel protocol. But default scan time is 60 seconds, so
> unless you have used 'scan time' option, it is probably related to
> some route exports.
>
> I see that you use 'ecmp', do you have ecmp support in kernel?
>
> Could you enable 'debug all' for ospf and kernel protocols and send me a
> log with netlink errors interleaved with trace messages from debug all?
>
> Is your custom 3.8.13 Linux kernel just customly compiled, or some local
> code modification?
>
> --
> Elen sila lumenn' omentielvo
>
> Ondrej 'SanTiago' Zajicek (email: santiago at crfreenet.org)
> OpenPGP encrypted e-mails preferred (KeyID 0x11DEADC3, wwwkeys.pgp.net)
> "To err is human -- to blame it on a computer is even more so."
>
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