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

From: Patrick McHardy
Date: Wed Apr 15 2009 - 06:15:30 EST


David Miller wrote:
From: Eric Dumazet <dada1@xxxxxxxxxxxxx>
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.
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