On 17/05/2019 11:46, Jan Beulich wrote:
@@ -2334,9 +2339,10 @@ static void dump_irqs(unsigned char key)
 
         spin_lock_irqsave(&desc->lock, flags);
 
-        printk("   IRQ:%4d aff:%*pb vec:%02x %-15s status=%03x ",
-               irq, nr_cpu_ids, cpumask_bits(desc->affinity), desc->arch.vector,
-               desc->handler->typename, desc->status);
+        printk("   IRQ:%4d aff:%*pb/%*pb vec:%02x %-15s status=%03x ",
+               irq, nr_cpu_ids, cpumask_bits(desc->affinity),
+               nr_cpu_ids, cpumask_bits(desc->arch.cpu_mask),
+               desc->arch.vector, desc->handler->typename, desc->status);

Taking a sample large system (Rome, with your x2apic series to be specific), which is only half as large as typical high-end Skylake systems.

(XEN) IRQ information:
(XEN)    IRQ:   0 affinity:00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000001 vec:f0 type=IO-APIC-edge    status=00000000 time.c#timer_interrupt()
(XEN)    IRQ:   1 affinity:00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000001 vec:68 type=IO-APIC-edge    status=00000002 mapped, unbound
(XEN)    IRQ:   3 affinity:ffffffff,ffffffff,ffffffff,ffffffff,ffffffff,ffffffff,ffffffff,ffffffff vec:70 type=IO-APIC-edge    status=00000002 mapped, unbound
(XEN)    IRQ:   4 affinity:ffffffff,ffffffff,ffffffff,ffffffff,ffffffff,ffffffff,ffffffff,ffffffff vec:f1 type=IO-APIC-edge    status=00000000 ns16550.c#ns16550_interrupt()
(XEN)    IRQ:   5 affinity:00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000001 vec:78 type=IO-APIC-edge    status=00000002 mapped, unbound
(XEN)    IRQ:   6 affinity:00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000001 vec:88 type=IO-APIC-edge    status=00000002 mapped, unbound
(XEN)    IRQ:   7 affinity:ffffffff,ffffffff,ffffffff,ffffffff,ffffffff,ffffffff,ffffffff,ffffffff vec:90 type=IO-APIC-level   status=00000002 mapped, unbound
(XEN)    IRQ:   8 affinity:00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000001 vec:98 type=IO-APIC-edge    status=00000030 in-flight=0 domain-list=0:  8(---),
(XEN)    IRQ:   9 affinity:00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000001 vec:a0 type=IO-APIC-level   status=00000030 in-flight=1 domain-list=0:  9(PMM),
This change is going to double up the affinity block, which will make the lines even longer.

Given that all examples I've ever spotted are either a single bit, or a fully set block, {%*pbl} will render in a much shorter, and keep the line length reasonable.  (This in practice applies to the previous patch as well).

~Andrew