Update documented default values for various TCP/UDP tunables

tcp_rmem and tcp_wmem use 1 page as default value for the minimum
amount of memory to be used, same as udp_wmem_min and udp_rmem_min.
Pages are different size on different architectures - use the right
units when describing the defaults.

Reviewed-by: Shan Wei <shanwei@cn.fujitsu.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Max Matveev <makc@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 4 deletions

diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt
index 1a6de5b52273..e3df1191e717 100644
--- a/Documentation/networking/ip-sysctl.txt
+++ b/Documentation/networking/ip-sysctl.txt
@@ -384,7 +384,7 @@ tcp_rmem - vector of 3 INTEGERs: min, default, max
         min: Minimal size of receive buffer used by TCP sockets.
         It is guaranteed to each TCP socket, even under moderate memory
         pressure.
-        Default: 8K
+        Default: 1 page
 
         default: initial size of receive buffer used by TCP sockets.
         This value overrides net.core.rmem_default used by other protocols.
@@ -473,7 +473,7 @@ tcp_window_scaling - BOOLEAN
 tcp_wmem - vector of 3 INTEGERs: min, default, max
         min: Amount of memory reserved for send buffers for TCP sockets.
         Each TCP socket has rights to use it due to fact of its birth.
-        Default: 4K
+        Default: 1 page
 
         default: initial size of send buffer used by TCP sockets.  This
         value overrides net.core.wmem_default used by other protocols.
@@ -543,13 +543,13 @@ 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
+        Default: 1 page
 
 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
+        Default: 1 page
 
 CIPSOv4 Variables: