tcp: use RACK to detect losses

[cascardo/linux.git] / Documentation / networking / ip-sysctl.txt

diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt
index 502d6a5..85752c8 100644 (file)
--- a/Documentation/networking/ip-sysctl.txt
+++ b/Documentation/networking/ip-sysctl.txt
@@ -433,6 +433,15 @@ tcp_orphan_retries - INTEGER
        you should think about lowering this value, such sockets
        may consume significant resources. Cf. tcp_max_orphans.
 
+tcp_recovery - INTEGER
+       This value is a bitmap to enable various experimental loss recovery
+       features.
+
+       RACK: 0x1 enables the RACK loss detection for fast detection of lost
+             retransmissions and tail drops.
+
+       Default: 0x1
+
 tcp_reordering - INTEGER
        Initial reordering level of packets in a TCP stream.
        TCP stack can then dynamically adjust flow reordering level