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| author |   David Howells <dhowells@redhat.com> | 2017-06-14 17:56:50 +0100 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2017-06-14 15:42:45 -0400 |
| commit | f7aec129a356ad049edddcb7e77b04a474fcf41f (patch) | |
| tree | 103d3fb8a7c99b6c9ebaeaf20d2c891174d72f48 /net/rxrpc/peer_object.c | |
| parent | liquidio: fix VF driver off-by-one bug when setting ethtool -C ethX rx-frames (diff) | |
| download | linux-dev-f7aec129a356ad049edddcb7e77b04a474fcf41f.tar.xz linux-dev-f7aec129a356ad049edddcb7e77b04a474fcf41f.zip | |
rxrpc: Cache the congestion window setting
Cache the congestion window setting that was determined during a call's
transmission phase when it finishes so that it can be used by the next call
to the same peer, thereby shortcutting the slow-start algorithm.
The value is stored in the rxrpc_peer struct and is accessed without
locking. Each call takes the value that happens to be there when it starts
and just overwrites the value when it finishes.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
| -rw-r--r-- | net/rxrpc/peer_object.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/net/rxrpc/peer_object.c b/net/rxrpc/peer_object.c index cfed3b27adf0..5787f97f5330 100644 --- a/net/rxrpc/peer_object.c +++ b/net/rxrpc/peer_object.c @@ -228,6 +228,13 @@ struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *local, gfp_t gfp) seqlock_init(&peer->service_conn_lock); spin_lock_init(&peer->lock); peer->debug_id = atomic_inc_return(&rxrpc_debug_id); + + if (RXRPC_TX_SMSS > 2190) + peer->cong_cwnd = 2; + else if (RXRPC_TX_SMSS > 1095) + peer->cong_cwnd = 3; + else + peer->cong_cwnd = 4; } _leave(" = %p", peer); |