diff options
| author | Florian Westphal <fw@strlen.de> | 2017-07-30 03:57:18 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-07-31 14:37:49 -0700 |
| commit | e7942d0633c47c791ece6afa038be9cf977226de (patch) | |
| tree | 27dddb46a5358137f6cb6e63bddab14a77a840ec /net/ipv4/tcp_minisocks.c | |
| parent | 764646b08d09d29adced740c26447ecdaabc9088 (diff) | |
| download | linux-e7942d0633c47c791ece6afa038be9cf977226de.tar.gz | |
tcp: remove prequeue support
prequeue is a tcp receive optimization that moves part of rx processing from bh to process context. This only works if the socket being processed belongs to a process that is blocked in recv on that socket. In practice, this doesn't happen anymore that often because nowadays servers tend to use an event driven (epoll) model. Even normal client applications (web browsers) commonly use many tcp connections in parallel. This has measureable impact only in netperf (which uses plain recv and thus allows prequeue use) from host to locally running vm (~4%), however, there were no changes when using netperf between two physical hosts with ixgbe interfaces. Signed-off-by: Florian Westphal <fw@strlen.de> 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, 0 insertions, 1 deletions
diff --git a/net/ipv4/tcp_minisocks.c b/net/ipv4/tcp_minisocks.c index 0ff83c1637d8..188a6f31356d 100644 --- a/net/ipv4/tcp_minisocks.c +++ b/net/ipv4/tcp_minisocks.c @@ -445,7 +445,6 @@ struct sock *tcp_create_openreq_child(const struct sock *sk, newtp->snd_sml = newtp->snd_una = newtp->snd_nxt = newtp->snd_up = treq->snt_isn + 1; - tcp_prequeue_init(newtp); INIT_LIST_HEAD(&newtp->tsq_node); tcp_init_wl(newtp, treq->rcv_isn); |