[libvirt] [PATCH v3 1/8] bandwidth: Attach sfq to leaf node

[Michal Privoznik]

SFQ is 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 files changed, 9 insertions(+), 0 deletions(-)

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);
-- 
1.7.8.6