[TCP]: tcp_memory_pressure and tcp_socket are__read_mostly candidates

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tcp_memory_pressure and tcp_socket currently share a cache line with tcp_memory_allocated, tcp_sockets_allocated.
(Very hot cache line)
It makes sense to declare these variables as __read_mostly, to avoid false sharing on SMP.

ffffffff8081d9c0 B tcp_orphan_count
ffffffff8081d9c4 B tcp_memory_allocated
ffffffff8081d9c8 B tcp_sockets_allocated
ffffffff8081d9cc B tcp_memory_pressure
ffffffff8081d9d0 b tcp_md5sig_users
ffffffff8081d9d8 b tcp_md5sig_pool
ffffffff8081d9e0 b warntime.31570
ffffffff8081d9e8 b tcp_socket

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Eric Dumazet 2007-03-27 13:58:31 -07:00 • committed by David S. Miller

parent 73417f617a

commit 4103f8cd5c

2 changed files with 2 additions and 2 deletions

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2

net/ipv4/tcp.c

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2

net/ipv4/tcp_ipv4.c

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