Eric Dumazet 70da268b56 net: SO_INCOMING_CPU setsockopt() support ... SO_INCOMING_CPU as added in commit 2c8c56e15d was a getsockopt() command to fetch incoming cpu handling a particular TCP flow after accept() This commits adds setsockopt() support and extends SO_REUSEPORT selection logic : If a TCP listener or UDP socket has this option set, a packet is delivered to this socket only if CPU handling the packet matches the specified one. This allows to build very efficient TCP servers, using one listener per RX queue, as the associated TCP listener should only accept flows handled in softirq by the same cpu. This provides optimal NUMA behavior and keep cpu caches hot. Note that __inet_lookup_listener() still has to iterate over the list of all listeners. Following patch puts sk_refcnt in a different cache line to let this iteration hit only shared and read mostly cache lines. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2015-10-12 19:28:20 -07:00
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linux	bpf: charge user for creation of BPF maps and programs	2015-10-12 19:13:36 -07:00
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net	net: SO_INCOMING_CPU setsockopt() support	2015-10-12 19:28:20 -07:00
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uapi	bridge: netlink: add support for port's multicast_router attribute	2015-10-07 04:49:34 -07:00
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