From 7e5040bd200b9ca401a5beb250f95d61a0edbf74 Mon Sep 17 00:00:00 2001
From: Michal Privoznik <mprivozn@redhat.com>
Date: Mon, 19 Nov 2012 12:16:07 +0100
Subject: [PATCH] bandwidth: Attach sfq to leaf node

Stochastic Fairness Queuing (SFQ) is queuing discipline
(qdisc) which doesn't really shape any traffic but 'just'
re-arrange packets in sending buffer so no stream starve.
The goal is to ensure fairness. There is basically only one
configuration parameter (perturb) which is set to advised
value of 10.
---
 src/util/virnetdevbandwidth.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/util/virnetdevbandwidth.c b/src/util/virnetdevbandwidth.c
index bddb788884..49fc4259a7 100644
--- a/src/util/virnetdevbandwidth.c
+++ b/src/util/virnetdevbandwidth.c
@@ -101,6 +101,15 @@ virNetDevBandwidthSet(const char *ifname,
         if (virCommandRun(cmd, NULL) < 0)
             goto cleanup;
 
+        virCommandFree(cmd);
+        cmd = virCommandNew(TC);
+        virCommandAddArgList(cmd, "qdisc", "add", "dev", ifname, "parent",
+                             "1:1", "handle", "2:", "sfq", "perturb",
+                             "10", NULL);
+
+        if (virCommandRun(cmd, NULL) < 0)
+            goto cleanup;
+
         virCommandFree(cmd);
         cmd = virCommandNew(TC);
         virCommandAddArgList(cmd,"filter", "add", "dev", ifname, "parent",
-- 
2.47.2