diff -Nru irqbalance-1.0.6/debian/changelog irqbalance-1.0.6/debian/changelog
--- irqbalance-1.0.6/debian/changelog	2015-02-11 00:47:18.000000000 +0100
+++ irqbalance-1.0.6/debian/changelog	2015-09-01 09:10:17.000000000 +0200
@@ -1,3 +1,10 @@
+irqbalance (1.0.6-3ubuntu2) vivid; urgency=medium
+
+  * d/p/0001-bug-893478_warn-once.patch: Only warn one
+    for affinity hint subset empty irqs. (LP: #1321425).
+
+ -- Jorge Niedbalski <jorge.niedbalski@canonical.com>  Fri, 10 Jul 2015 18:03:41 -0300
+
 irqbalance (1.0.6-3ubuntu1) vivid; urgency=medium
 
   * Add build-dep on libnuma-dev on all arches where it's available.
diff -Nru irqbalance-1.0.6/debian/patches/0001-bug-893478_warn-once.patch irqbalance-1.0.6/debian/patches/0001-bug-893478_warn-once.patch
--- irqbalance-1.0.6/debian/patches/0001-bug-893478_warn-once.patch	1970-01-01 01:00:00.000000000 +0100
+++ irqbalance-1.0.6/debian/patches/0001-bug-893478_warn-once.patch	2015-09-01 09:10:30.000000000 +0200
@@ -0,0 +1,38 @@
+Description: Only warn once for affinity hint 
+subset empty irqs. (LP: #1321425). 
+
+Origin: upstream, https://github.com/Irqbalance/irqbalance/commit/c9e5f36fe91d2d04d013d96f1093419245585de7
+Bug-Ubuntu: https://bugs.launchpad.net/bugs/1321425
+
+--- irqbalance-1.0.6.orig/activate.c
++++ irqbalance-1.0.6/activate.c
+@@ -84,11 +84,14 @@ static void activate_mapping(struct irq_
+ 		if ((hint_policy == HINT_POLICY_SUBSET) &&
+ 		    (!cpus_empty(info->affinity_hint))) {
+ 			cpus_and(applied_mask, applied_mask, info->affinity_hint);
+-			if (!cpus_intersects(applied_mask, unbanned_cpus))
+-				log(TO_ALL, LOG_WARNING,
+-				    "irq %d affinity_hint subset empty\n",
+-				   info->irq);
+-			else
++                        if (!cpus_intersects(applied_mask, unbanned_cpus)) {
++                            if (!info->warned) {
++                                info->warned = 1;
++                                log(TO_ALL, LOG_WARNING,
++                                    "irq %d affinity_hint subset empty\n",
++                                    info->irq);
++                            }
++			} else
+ 				valid_mask = 1;
+ 		} else {
+ 			valid_mask = 1;
+--- irqbalance-1.0.6.orig/types.h
++++ irqbalance-1.0.6/types.h
+@@ -63,6 +63,7 @@ struct irq_info {
+ 	uint64_t load;
+         int moved;
+         struct topo_obj *assigned_obj;
++        unsigned int warned;
+ };
+ 
+ #endif
diff -Nru irqbalance-1.0.6/debian/patches/series irqbalance-1.0.6/debian/patches/series
--- irqbalance-1.0.6/debian/patches/series	2013-06-06 12:22:45.000000000 +0200
+++ irqbalance-1.0.6/debian/patches/series	2015-09-01 09:10:17.000000000 +0200
@@ -1 +1,2 @@
 irqbalance.1.patch
+0001-bug-893478_warn-once.patch