netdev - Re: [PATCH net v2] vlan: Fix lockdep warning when vlan dev handle notification

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Message-ID: <5334CCB7.9040703@huawei.com>
Date:	Fri, 28 Mar 2014 09:13:27 +0800
From:	Ding Tianhong <dingtianhong@...wei.com>
To:	David Miller <davem@...emloft.net>
CC:	<ben@...adent.org.uk>, <john.r.fastabend@...el.com>,
	<kaber@...sh.net>, <netdev@...r.kernel.org>, <f.fainelli@...il.com>
Subject: Re: [PATCH net v2] vlan: Fix lockdep warning when vlan dev handle
 notification

On 2014/3/28 1:06, David Miller wrote:
> From: Ding Tianhong <dingtianhong@...wei.com>
> Date: Mon, 17 Mar 2014 11:08:37 +0800
> 
>> On 2014/3/15 10:02, David Miller wrote:
>>> From: Ding Tianhong <dingtianhong@...wei.com>
>>> Date: Thu, 13 Mar 2014 10:22:18 +0800
>>>
>>>> When I open the LOCKDEP config and run these steps:
>>>
>>> This doesn't work?
>>>
>>
>> It make no sense, I have try it before, the class check only focus on the lock_class_key,
>> not the lockdep_subclass_key.
> 
> I think the issue is that not all of the addrlist locking uses _nested() variants,
> I think if we do that, this will all work.
> 
> I do not want to add a huge array of locking keys to fix this, it's a waste of
> static kernel memory and inelegant.
> 
> 
OK, ready for fix this again with new idea, thanks.

Ding

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