Messages in this thread | | | Date | Wed, 15 Apr 2009 16:42:05 +0200 | From | Jiri Pirko <> | Subject | Re: [PATCH 1/3] net: introduce a list of device addresses dev_addr_list |
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Wed, Apr 15, 2009 at 12:13:57PM CEST, kaber@trash.net wrote: > David Miller wrote: >> From: Eric Dumazet <dada1@cosmosbay.com> >> 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.
Ok, but for dev_addr_X() functions the RTNL mutex is sufficient so I see no point of adding another lock here. When the multicast handling functions will be implemented to use netdev_hw_addr and it's layer, then we need to use update lock in dev_multicast_X.
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