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

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Date:	Thu, 19 Feb 2009 10:20:04 -0800
From:	Jay Vosburgh <fubar@...ibm.com>
To:	Randy Dunlap <randy.dunlap@...cle.com>
cc:	Andrey Borzenkov <arvidjaar@...l.ru>,
	"Rafael J. Wysocki" <rjw@...k.pl>, netdev@...r.kernel.org,
	bonding-devel@...ts.sourceforge.net,
	=?ISO-8859-1?Q?=22J=2EA=2E_Magall?= =?ISO-8859-1?Q?=F3n=22?= 
	<jamagallon@....com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: 2.6.29 regression? Bonding tied to IPV6 in 29-rc5

Randy Dunlap <randy.dunlap@...cle.com> wrote:

>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.
>
>Just for clarification, is this a run-time (module load-time) error
>but not a build error?

	Yes, module load error, but not a build error.

	The build with CONFIG_IPV6 is fine, and bonding loads fine as
long as ipv6 is loaded.  The issue arises when the ipv6 module is
prevented from loading; in that case, bonding cannot load because it now
requires functionality from ipv6.

	-J

---
	-Jay Vosburgh, IBM Linux Technology Center, fubar@...ibm.com
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