Re: [PATCH] ip6tnl: avoid touching dst refcount in ip6_tnl_xmit2()

[PATCH] ip6tnl: avoid touching dst refcount in ip6_tnl_xmit2() · Eric Dumazet <hidden> · 2011-07-28
Re: [PATCH] ip6tnl: avoid touching dst refcount in ip6_tnl_xmit2() · David Miller <davem@davemloft.net> · 2011-08-01

From: David Miller <davem@davemloft.net>
Date: 2011-08-01 08:56:08

From: Eric Dumazet <redacted>
Date: Thu, 28 Jul 2011 16:32:25 +0200

Even using percpu stats, we still hit tunnel dst_entry refcount in
ip6_tnl_xmit2()

Since we are in RCU locked section, we can use skb_dst_set_noref() and
avoid these atomic operations, leaving dst shared on cpus.

Signed-off-by: Eric Dumazet <redacted>

Queued up for net-next

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