Merge remote-tracking branch 'samsung/for-next'

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

diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt
index ebe94f2cab9811e62f0ea1d64c0d6c75838d0367..05915be862356cf75230851920af5d4738b095b5 100644 (file)
--- a/Documentation/networking/ip-sysctl.txt
+++ b/Documentation/networking/ip-sysctl.txt
@@ -384,6 +384,14 @@ tcp_mem - vector of 3 INTEGERs: min, pressure, max
        Defaults are calculated at boot time from amount of available
        memory.
 
+tcp_min_rtt_wlen - INTEGER
+       The window length of the windowed min filter to track the minimum RTT.
+       A shorter window lets a flow more quickly pick up new (higher)
+       minimum RTT when it is moved to a longer path (e.g., due to traffic
+       engineering). A longer window makes the filter more resistant to RTT
+       inflations such as transient congestion. The unit is seconds.
+       Default: 300
+
 tcp_moderate_rcvbuf - BOOLEAN
        If set, TCP performs receive buffer auto-tuning, attempting to
        automatically size the buffer (no greater than tcp_rmem[2]) to
@@ -425,6 +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
@@ -1199,7 +1216,8 @@ tag - INTEGER
 xfrm4_gc_thresh - INTEGER
        The threshold at which we will start garbage collecting for IPv4
        destination cache entries.  At twice this value the system will
-       refuse new allocations.
+       refuse new allocations. The value must be set below the flowcache
+       limit (4096 * number of online cpus) to take effect.
 
 igmp_link_local_mcast_reports - BOOLEAN
        Enable IGMP reports for link local multicast groups in the
@@ -1645,7 +1663,8 @@ ratelimit - INTEGER
 xfrm6_gc_thresh - INTEGER
        The threshold at which we will start garbage collecting for IPv6
        destination cache entries.  At twice this value the system will
-       refuse new allocations.
+       refuse new allocations. The value must be set below the flowcache
+       limit (4096 * number of online cpus) to take effect.
 
 
 IPv6 Update by: