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Date: Tue, 20 Oct 2009 14:06:32 +0900 From: Stephen Hemminger <shemminger@...tta.com> To: Eric Dumazet <eric.dumazet@...il.com> Cc: David Miller <davem@...emloft.net>, netdev@...r.kernel.org Subject: Re: [PATCH net-next-2.6] net: Introduce dev_get_by_index_rcu() On Tue, 20 Oct 2009 07:03:44 +0200 Eric Dumazet <eric.dumazet@...il.com> wrote: > David Miller a écrit : > > From: Eric Dumazet <eric.dumazet@...il.com> > > Date: Tue, 20 Oct 2009 06:23:54 +0200 > > > >> I wonder if the whole thing could use RCU somehow, since some > >> workloads hit this dev_base_lock rwlock pretty hard... > > > > True, but for now we'll put your fix in :-) > > [PATCH net-next-2.6] net: Introduce dev_get_by_index_rcu() > > Some workloads hit dev_base_lock rwlock pretty hard. > We can use RCU lookups to avoid touching this rwlock. > > netdevices are already freed after a RCU grace period, so this patch > adds no penalty at device dismantle time. > > Signed-off-by: Eric Dumazet <eric.dumazet@...il.com> All usage dev_base_lock should be replaceable by using combination of rtnl_mutex and RCU? -- 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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