Florian Westphal a0f82f64e2
syncookies: remove last_synq_overflow from struct tcp_sock ...
last_synq_overflow eats 4 or 8 bytes in struct tcp_sock, even
though it is only used when a listening sockets syn queue
is full.
We can (ab)use rx_opt.ts_recent_stamp to store the same information;
it is not used otherwise as long as a socket is in listen state.
Move linger2 around to avoid splitting struct mtu_probe
across cacheline boundary on 32 bit arches.
Signed-off-by: Florian Westphal <fw@strlen.de >
Signed-off-by: David S. Miller <davem@davemloft.net >
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a0f82f64e2