X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=Documentation%2Fnetworking%2Fip-sysctl.txt;h=17a6e46fbd43abfce8ad5558f99200f8389ac650;hb=ad5e1b0f5d913d2c8bddfba81049cc07228da1a6;hp=747a5d15d529c8bff449d88802b79b70a213a775;hpb=0b776eb5426752d4e53354ac89e3710d857e09a7;p=firefly-linux-kernel-4.4.55.git

diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt
index 747a5d15d529..17a6e46fbd43 100644
--- a/Documentation/networking/ip-sysctl.txt
+++ b/Documentation/networking/ip-sysctl.txt
@@ -184,14 +184,14 @@ tcp_frto - INTEGER
 	F-RTO is an enhanced recovery algorithm for TCP retransmission
 	timeouts.  It is particularly beneficial in wireless environments
 	where packet loss is typically due to random radio interference
-	rather than intermediate router congestion.  FRTO is sender-side
+	rather than intermediate router congestion.  F-RTO is sender-side
 	only modification.  Therefore it does not require any support from
 	the peer, but in a typical case, however, where wireless link is
 	the local access link and most of the data flows downlink, the
-	faraway servers should have FRTO enabled to take advantage of it.
+	faraway servers should have F-RTO enabled to take advantage of it.
 	If set to 1, basic version is enabled.  2 enables SACK enhanced
 	F-RTO if flow uses SACK.  The basic version can be used also when
-	SACK is in use though scenario(s) with it exists where FRTO
+	SACK is in use though scenario(s) with it exists where F-RTO
 	interacts badly with the packet counting of the SACK enabled TCP
 	flow.
 
@@ -446,6 +446,33 @@ tcp_dma_copybreak - INTEGER
 	and CONFIG_NET_DMA is enabled.
 	Default: 4096
 
+UDP variables:
+
+udp_mem - vector of 3 INTEGERs: min, pressure, max
+	Number of pages allowed for queueing by all UDP sockets.
+
+	min: Below this number of pages UDP is not bothered about its
+	memory appetite. When amount of memory allocated by UDP exceeds
+	this number, UDP starts to moderate memory usage.
+
+	pressure: This value was introduced to follow format of tcp_mem.
+
+	max: Number of pages allowed for queueing by all UDP sockets.
+
+	Default is calculated at boot time from amount of available memory.
+
+udp_rmem_min - INTEGER
+	Minimal size of receive buffer used by UDP sockets in moderation.
+	Each UDP socket is able to use the size for receiving data, even if
+	total pages of UDP sockets exceed udp_mem pressure. The unit is byte.
+	Default: 4096
+
+udp_wmem_min - INTEGER
+	Minimal size of send buffer used by UDP sockets in moderation.
+	Each UDP socket is able to use the size for sending data, even if
+	total pages of UDP sockets exceed udp_mem pressure. The unit is byte.
+	Default: 4096
+
 CIPSOv4 Variables:
 
 cipso_cache_enable - BOOLEAN