diff options
| author | Eric Dumazet <edumazet@google.com> | 2015-10-08 21:16:48 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-10-11 15:33:15 +0300 |
| commit | 6bcfd7f8c28887a4298bc4386b02cb90c9fa0c13 (patch) | |
| tree | 34a3fa802965d1c97f5c242b79436bb648fa13c9 /net/ipv4/tcp_minisocks.c | |
| parent | 5010ea59e1b986d89023c0552fa38e32b519a617 (diff) | |
| download | linux-6bcfd7f8c28887a4298bc4386b02cb90c9fa0c13.tar.xz | |
tcp: fix RFS vs lockless listeners
Before recent TCP listener patches, we were updating listener
sk->sk_rxhash before the cloning of master socket.
children sk_rxhash was therefore correct after the normal 3WHS.
But with lockless listener, we no longer dirty/change listener sk_rxhash
as it would be racy.
We need to correctly update the child sk_rxhash, otherwise first data
packet wont hit correct cpu if RFS is used.
Fixes: 079096f103fa ("tcp/dccp: install syn_recv requests into ehash table")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Willem de Bruijn <willemb@google.com>
Cc: Tom Herbert <tom@herbertland.com>
Acked-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp_minisocks.c')
| -rw-r--r-- | net/ipv4/tcp_minisocks.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/ipv4/tcp_minisocks.c b/net/ipv4/tcp_minisocks.c index 9adf1e2c3170..1079e6ad77fe 100644 --- a/net/ipv4/tcp_minisocks.c +++ b/net/ipv4/tcp_minisocks.c @@ -768,6 +768,7 @@ struct sock *tcp_check_req(struct sock *sk, struct sk_buff *skb, if (!child) goto listen_overflow; + sock_rps_save_rxhash(child, skb); tcp_synack_rtt_meas(child, req); inet_csk_reqsk_queue_drop(sk, req); inet_csk_reqsk_queue_add(sk, req, child); |