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authorDavid Howells <dhowells@redhat.com>2017-06-14 19:56:50 +0300
committerDavid S. Miller <davem@davemloft.net>2017-06-14 22:42:45 +0300
commitf7aec129a356ad049edddcb7e77b04a474fcf41f (patch)
tree103d3fb8a7c99b6c9ebaeaf20d2c891174d72f48 /net/rxrpc/ar-internal.h
parent0430a26054733de6e7884a4d2872613f9d8b9a66 (diff)
downloadlinux-f7aec129a356ad049edddcb7e77b04a474fcf41f.tar.xz
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/ar-internal.h')
-rw-r--r--net/rxrpc/ar-internal.h2
1 files changed, 2 insertions, 0 deletions
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 */
};
/*