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authorDavid Howells <dhowells@redhat.com>2017-06-14 17:56:50 +0100
committerDavid S. Miller <davem@davemloft.net>2017-06-14 15:42:45 -0400
commitf7aec129a356ad049edddcb7e77b04a474fcf41f (patch)
tree103d3fb8a7c99b6c9ebaeaf20d2c891174d72f48 /net/rxrpc/call_object.c
parent0430a26054733de6e7884a4d2872613f9d8b9a66 (diff)
downloadlinux-stericsson-f7aec129a356ad049edddcb7e77b04a474fcf41f.tar.gz
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 'net/rxrpc/call_object.c')
-rw-r--r--net/rxrpc/call_object.c7
1 files changed, 1 insertions, 6 deletions
diff --git a/net/rxrpc/call_object.c b/net/rxrpc/call_object.c
index 423030fd93be..d7809a0620b4 100644
--- a/net/rxrpc/call_object.c
+++ b/net/rxrpc/call_object.c
@@ -136,12 +136,7 @@ struct rxrpc_call *rxrpc_alloc_call(gfp_t gfp)
call->tx_winsize = 16;
call->rx_expect_next = 1;
- if (RXRPC_TX_SMSS > 2190)
- call->cong_cwnd = 2;
- else if (RXRPC_TX_SMSS > 1095)
- call->cong_cwnd = 3;
- else
- call->cong_cwnd = 4;
+ call->cong_cwnd = 2;
call->cong_ssthresh = RXRPC_RXTX_BUFF_SIZE - 1;
return call;