[PATCH 1/2] Update description of net.sctp.sctp_rmem and net.sctp.sctp_wmem tunables

Max Matveev
2011-07-04T08:36:07Z

sctp does not use second and third ("default" and "max") values
of sctp_(r|w)mem tunables. The format is the same and tcp_(r|w)mem
but the meaning is different so make the documentation explicit to
avoid confusion.

Signed-off-by: Max Matveev <makc@redhat.com>
---
Documentation/networking/ip-sysctl.txt | 11 +++++++++--
1 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt
index d3d653a..f37d374 100644
--- a/Documentation/networking/ip-sysctl.txt
+++ b/Documentation/networking/ip-sysctl.txt
@@ -1465,10 +1465,17 @@ sctp_mem - vector of 3 INTEGERs: min, pressure, max
Default is calculated at boot time from amount of available memory.

sctp_rmem - vector of 3 INTEGERs: min, default, max
- See tcp_rmem for a description.
+ Only the first value ("min") is used, "default" and "max" are
+ ignored and may be removed in the future versions.
+
+ min: Minimal size of receive buffer used by SCTP socket.
+ It is guaranteed to each STCP socket (but not association) even
+ under moderate memory pressure.
+
+ Default: 1 page

sctp_wmem - vector of 3 INTEGERs: min, default, max
- See tcp_wmem for a description.
+ Currently this tunable has no effect.

addr_scope_policy - INTEGER
Control IPv4 address scoping - draft-stewart-tsvwg-sctp-ipv4-00
--
1.7.3.3