Commit 2f1bd67d authored May 21, 2012 by Konrad Rzeszutek Wilk

xen/smp: unbind irqworkX when unplugging vCPUs.



The git commit  1ff2b0c3
"xen: implement IRQ_WORK_VECTOR handler" added the functionality
to have a per-cpu "irqworkX" for the IPI APIC functionality.
However it missed the unbind when a vCPU is unplugged resulting
in an orphaned per-cpu interrupt line for unplugged vCPU:

  30:        216          0   xen-dyn-event     hvc_console
  31:        810          4   xen-dyn-event     eth0
  32:         29          0   xen-dyn-event     blkif
- 36:          0          0  xen-percpu-ipi       irqwork2
- 37:        287          0   xen-dyn-event     xenbus
+ 36:        287          0   xen-dyn-event     xenbus
 NMI:          0          0   Non-maskable interrupts
 LOC:          0          0   Local timer interrupts
 SPU:          0          0   Spurious interrupts

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

parent 4b3451ad

arch/x86/xen/smp.c

+1 −0

Original line number	Original line	Diff line number	Diff line
	@@ -419,6 +419,7 @@ static void xen_cpu_die(unsigned int cpu)
	unbind_from_irqhandler(per_cpu(xen_callfunc_irq, cpu), NULL);		unbind_from_irqhandler(per_cpu(xen_callfunc_irq, cpu), NULL);
	unbind_from_irqhandler(per_cpu(xen_debug_irq, cpu), NULL);		unbind_from_irqhandler(per_cpu(xen_debug_irq, cpu), NULL);
	unbind_from_irqhandler(per_cpu(xen_callfuncsingle_irq, cpu), NULL);		unbind_from_irqhandler(per_cpu(xen_callfuncsingle_irq, cpu), NULL);
			unbind_from_irqhandler(per_cpu(xen_irq_work, cpu), NULL);
	xen_uninit_lock_cpu(cpu);		xen_uninit_lock_cpu(cpu);
	xen_teardown_timer(cpu);		xen_teardown_timer(cpu);