Re: 2.6.29 regression? Bonding tied to IPV6 in 29-rc5

From: Thomas Backlund
Date: Tue Feb 17 2009 - 16:22:19 EST


Brian Haley skrev:
Andrey Borzenkov wrote:
On 17 of February 2009 20:01:38 Andrey Borzenkov wrote:
Forward to bonding and netdev

On 17 of February 2009 11:52:32 J.A. Magallón wrote:
Hi all...

Don't know if this is specific for -rc5, I have jumped from 28.4 to
29-rc5. In this latest kernel, I can not install 'bonding' module
if 'ipv6' is disabled to load via modprobe.conf:

install ipv6 /bin/true

Trying bonding gives this dmesg:

bonding: Unknown symbol ndisc_build_skb
bonding: Unknown symbol in6_dev_finish_destroy
bonding: Unknown symbol ndisc_send_skb
bonding: Unknown symbol unregister_inet6addr_notifier
bonding: Unknown symbol register_inet6addr_notifier

Commenting the line in modprobe.conf makes things smooth again.
We can not disable ipv6 anymore ?
If IPv6 is disable in kernel config bonding loads. But I think it is
regression, it should be possible to disable IPv6 if not required.

This hard dependency was apparently introduced by this commit:

commit 305d552accae6afb859c493ebc7d98ca3371dae2
Author: Brian Haley <brian.haley@xxxxxx>
Date: Tue Nov 4 17:51:14 2008 -0800

bonding: send IPv6 neighbor advertisement on failover

I initially had bonding IPv6 support as a Kconfig option, but it was decided it would be cleaner if it just got built-in whenever CONFIG_IPV6 was set like SCTP, with the assumption you might want it.

Is it a common configuration to not allow a module to load like you're doing in modprobe.conf? I don't know how hard it would be to rip this

Yep.

out into it's own bonding_ipv6.ko module, simply turning-off CONFIG_IPV6 seems better.

That's not an option for distro kernels ...

--
Thomas
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/