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Update documented default values for various TCP/UDP tunables

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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>
This commit is contained in:
Max Matveev 2011-06-21 21:18:13 +00:00 committed by David S. Miller
parent a6e1204b82
commit 6539fefd9b
1 changed files with 4 additions and 4 deletions
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8
Documentation/networking/ip-sysctl.txt
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@ -384,7 +384,7 @@ tcp_rmem - vector of 3 INTEGERs: min, default, max
min: Minimal size of receive buffer used by TCP sockets. min: Minimal size of receive buffer used by TCP sockets.
It is guaranteed to each TCP socket, even under moderate memory It is guaranteed to each TCP socket, even under moderate memory
pressure. pressure.
Default: 8K Default: 1 page
default: initial size of receive buffer used by TCP sockets. default: initial size of receive buffer used by TCP sockets.
This value overrides net.core.rmem_default used by other protocols. 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 tcp_wmem - vector of 3 INTEGERs: min, default, max
min: Amount of memory reserved for send buffers for TCP sockets. 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. 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 default: initial size of send buffer used by TCP sockets. This
value overrides net.core.wmem_default used by other protocols. 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. 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 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. total pages of UDP sockets exceed udp_mem pressure. The unit is byte.
Default: 4096 Default: 1 page
udp_wmem_min - INTEGER udp_wmem_min - INTEGER
Minimal size of send buffer used by UDP sockets in moderation. 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 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. total pages of UDP sockets exceed udp_mem pressure. The unit is byte.
Default: 4096 Default: 1 page
CIPSOv4 Variables: CIPSOv4 Variables: