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Date: Fri, 30 Oct 2009 07:30:43 +0100 From: Eric Dumazet <eric.dumazet@...il.com> To: Patrick McHardy <kaber@...sh.net> CC: "David S. Miller" <davem@...emloft.net>, Linux Netdev List <netdev@...r.kernel.org> Subject: Re: [PATCH 4/6] vlan: Optimize multiple unregistration Patrick McHardy a écrit : > Eric Dumazet wrote: >> Patrick McHardy a écrit : >> >>> Indeed, but unregister_vlan_dev() destroys the group once the >>> count has reached zero, so we must not access it after that. >> Well, I hoped call_rcu() callback doesnt fire and kfree(grp) until we exited >> from unregister_vlan_dev_alls(), with RTNL locked... > > The RTNL is a mutex, so it shouldn't prevent call_rcu from firing. Oops this is totally right of course, so your patch is actually a bug fix :) Acked-by: Eric Dumazet <eric.dumazet@...il.com> -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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