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authorEric Dumazet <edumazet@google.com>2015-10-16 13:00:01 -0700
committerDavid S. Miller <davem@davemloft.net>2015-10-18 22:26:02 -0700
commitdc6ef6be52154490c5c03f742e28bc781cc751b2 (patch)
tree8e297dd00c9cef73f67424b72a5669d6a97d13f7 /net/ipv4/ip_output.c
parent951b5d959f1da4bae8910085a2d8d6a3d374c72d (diff)
downloadlinux-dc6ef6be52154490c5c03f742e28bc781cc751b2.tar.bz2
tcp: do not set queue_mapping on SYNACK
At the time of commit fff326990789 ("tcp: reflect SYN queue_mapping into SYNACK packets") we had little ways to cope with SYN floods. We no longer need to reflect incoming skb queue mappings, and instead can pick a TX queue based on cpu cooking the SYNACK, with normal XPS affinities. Note that all SYNACK retransmits were picking TX queue 0, this no longer is a win given that SYNACK rtx are now distributed on all cpus. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/ip_output.c')
-rw-r--r--net/ipv4/ip_output.c1
1 files changed, 0 insertions, 1 deletions
diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index 67404e1fe7d4..50e29737b584 100644
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -1596,7 +1596,6 @@ void ip_send_unicast_reply(struct sock *sk, struct sk_buff *skb,
arg->csumoffset) = csum_fold(csum_add(nskb->csum,
arg->csum));
nskb->ip_summed = CHECKSUM_NONE;
- skb_set_queue_mapping(nskb, skb_get_queue_mapping(skb));
ip_push_pending_frames(sk, &fl4);
}
out: