Subject: Re: [PATCH 1/3] net: introduce a list of device addresses dev_addr_list

From: Patrick McHardy <[email-masked]>
Date: Wed, 15 Apr 2009 12:13:57 +0200

David Miller wrote:
> From: Eric Dumazet <[email-masked]>
> Date: Wed, 15 Apr 2009 11:27:50 +0200
> 
>> Since you obviously need a write lock here to be sure following
>> can be done by one cpu only.
>>
>> You have same problem all over this patch.
> 
> RTNL semaphore is held across all modification operations.

If this will also be used for multicast lists, changes can happen
(IPv6) without the RTNL.