File libvirt-bandwidth-Attach-sfq-to-leaf-node.patch of Package libvirt

From accafb994a706bc6a9ac48b8e5dba9c09b3a8b9e Mon Sep 17 00:00:00 2001
Message-Id: <accafb994a706bc6a9ac48b8e5dba9c09b3a8b9e.1373271643.git.jdenemar@redhat.com>
From: Michal Privoznik <mprivozn@redhat.com>
Date: Fri, 14 Jun 2013 10:26:03 +0200
Subject: [PATCH] bandwidth: Attach sfq to leaf node

https://bugzilla.redhat.com/show_bug.cgi?id=895340

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.
(cherry picked from commit 7e5040bd200b9ca401a5beb250f95d61a0edbf74)
---
 src/util/virnetdevbandwidth.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/util/virnetdevbandwidth.c b/src/util/virnetdevbandwidth.c
index bddb788..49fc425 100644
--- a/src/util/virnetdevbandwidth.c
+++ b/src/util/virnetdevbandwidth.c
@@ -103,6 +103,15 @@ virNetDevBandwidthSet(const char *ifname,
 
         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",
                              "1:0", "protocol", "ip", "handle", "1", "fw",
                              "flowid", "1", NULL);
-- 
1.8.2.1