netfilter: nf_conntrack: per_cpu untracking
NOTRACK makes all cpus share a cache line on nf_conntrack_untracked twice per packet, slowing down performance. This patch converts it to a per_cpu variable. Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com> Signed-off-by: NPatrick McHardy <kaber@trash.net>
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