From 90f2f5318b3a5b0898fef0fec9b91376c7de7a2c Mon Sep 17 00:00:00 2001 From: Vlad Yasevich Date: Mon, 23 Nov 2009 15:53:57 -0500 Subject: sctp: Update SWS avaoidance receiver side algorithm We currently send window update SACKs every time we free up 1 PMTU worth of data. That a lot more SACKs then necessary. Instead, we'll now send back the actuall window every time we send a sack, and do window-update SACKs when a fraction of the receive buffer has been opened. The fraction is controlled with a sysctl. Signed-off-by: Vlad Yasevich --- net/sctp/sysctl.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'net/sctp/sysctl.c') diff --git a/net/sctp/sysctl.c b/net/sctp/sysctl.c index ab7151da120f..ae03ded2bf1a 100644 --- a/net/sctp/sysctl.c +++ b/net/sctp/sysctl.c @@ -52,6 +52,7 @@ static int int_max = INT_MAX; static int sack_timer_min = 1; static int sack_timer_max = 500; static int addr_scope_max = 3; /* check sctp_scope_policy_t in include/net/sctp/constants.h for max entries */ +static int rwnd_scale_max = 16; extern int sysctl_sctp_mem[3]; extern int sysctl_sctp_rmem[3]; @@ -284,6 +285,18 @@ static ctl_table sctp_table[] = { .extra1 = &zero, .extra2 = &addr_scope_max, }, + { + .ctl_name = CTL_UNNUMBERED, + .procname = "rwnd_update_shift", + .data = &sctp_rwnd_upd_shift, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = &proc_dointvec_minmax, + .strategy = &sysctl_intvec, + .extra1 = &one, + .extra2 = &rwnd_scale_max, + }, + { .ctl_name = 0 } }; -- cgit v1.2.3