From: chenweilong <chenweilong@huawei•com>
To: David Miller <davem@davemloft•net>, <gaofeng@cn•fujitsu.com>,
<kumaran.4353@gmail•com>, <netdev@vger•kernel.org>
Subject: Re: [PATCH] ipv6: don't call addrconf_dst_alloc again when enable lo
Date: Thu, 2 Jan 2014 13:48:46 +0800 [thread overview]
Message-ID: <52C4FDBE.5030607@huawei.com> (raw)
In-Reply-To: <20131231035718.GB27636@order.stressinduktion.org>
On 2013/12/31 11:57, Hannes Frederic Sowa wrote:
> On Wed, Jun 19, 2013 at 11:05:32PM -0700, David Miller wrote:
>> From: Gao feng <gaofeng@cn•fujitsu.com>
>> Date: Sun, 16 Jun 2013 11:14:30 +0800
>>
>>> If we disable all of the net interfaces, and enable
>>> un-lo interface before lo interface, we already allocated
>>> the addrconf dst in ipv6_add_addr. So we shouldn't allocate
>>> it again when we enable lo interface.
>>>
>>> Otherwise the message below will be triggered.
>>> unregister_netdevice: waiting for sit1 to become free. Usage count = 1
>>>
>>> This problem is introduced by commit 25fb6ca4ed9cad72f14f61629b68dc03c0d9713f
>>> "net IPv6 : Fix broken IPv6 routing table after loopback down-up"
>>>
>>> Signed-off-by: Gao feng <gaofeng@cn•fujitsu.com>
>>
>> This is the second such regression added by that commit :-/
>>
>> Applied and queue up for -stable, thanks.
>
> Hmm, and this change also has a regression and breaks the original fix. :/
>
> https://bugzilla.kernel.org/show_bug.cgi?id=67951
>
> I tried to track it down but it seems pretty complicated. Maybe we have to
> special-case the take-down of the loopback device.
>
>
>
Hi,
When I did the tests,If 'ifconfig lo down',all IPv6 connection broken,
but IPv4 connection were still OK.
Is it designed like that or a bug?
Thanks
next prev parent reply other threads:[~2014-01-02 5:49 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-16 3:14 [PATCH] ipv6: don't call addrconf_dst_alloc again when enable lo Gao feng
2013-06-20 6:05 ` David Miller
2013-12-31 3:57 ` Hannes Frederic Sowa
2014-01-02 5:48 ` chenweilong [this message]
2014-01-02 6:03 ` Hannes Frederic Sowa
2014-01-02 8:13 ` chenweilong
2014-01-02 8:32 ` Hannes Frederic Sowa
2014-01-02 9:08 ` chenweilong
2014-01-02 6:54 ` Hannes Frederic Sowa
2014-01-02 7:58 ` chenweilong
2014-01-02 8:23 ` Hannes Frederic Sowa
2014-01-02 9:33 ` chenweilong
2014-01-03 6:53 ` Hannes Frederic Sowa
2014-01-08 7:50 ` Gao feng
2014-01-08 8:05 ` Hannes Frederic Sowa
2014-01-08 8:42 ` Gao feng
2014-01-08 8:55 ` Hannes Frederic Sowa
2014-01-17 2:02 ` chenweilong
2014-01-17 4:09 ` Hannes Frederic Sowa
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