From f7aec129a356ad049edddcb7e77b04a474fcf41f Mon Sep 17 00:00:00 2001 From: David Howells Date: Wed, 14 Jun 2017 17:56:50 +0100 Subject: 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 Signed-off-by: David S. Miller --- net/rxrpc/ar-internal.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'net/rxrpc/ar-internal.h') diff --git a/net/rxrpc/ar-internal.h b/net/rxrpc/ar-internal.h index adbf37946450..69b97339ff9d 100644 --- a/net/rxrpc/ar-internal.h +++ b/net/rxrpc/ar-internal.h @@ -300,6 +300,8 @@ struct rxrpc_peer { u64 rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* Determined RTT cache */ u8 rtt_cursor; /* next entry at which to insert */ u8 rtt_usage; /* amount of cache actually used */ + + u8 cong_cwnd; /* Congestion window size */ }; /* -- cgit