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Commit 27d8b207 authored by Konrad Rzeszutek Wilk's avatar Konrad Rzeszutek Wilk
Browse files

xen/smp/pvhvm: Don't initialize IRQ_WORKER as we are using the native one. 



There is no need to use the PV version of the IRQ_WORKER mechanism
as under PVHVM we are using the native version. The native
version is using the SMP API.

They just sit around unused:

  69:          0          0  xen-percpu-ipi       irqwork0
  83:          0          0  xen-percpu-ipi       irqwork1

Signed-off-by: default avatarKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
parent 70dd4998

arch/x86/xen/smp.c

+12 −1
Original line number Diff line number Diff line
@@ -144,6 +144,13 @@ static int xen_smp_intr_init(unsigned int cpu) 
		goto fail;

	per_cpu(xen_callfuncsingle_irq, cpu) = rc;



	/*

	 * The IRQ worker on PVHVM goes through the native path and uses the

	 * IPI mechanism.

	 */

	if (xen_hvm_domain())

		return 0;



	callfunc_name = kasprintf(GFP_KERNEL, "irqwork%d", cpu);

	rc = bind_ipi_to_irqhandler(XEN_IRQ_WORK_VECTOR,

				    cpu,
@@ -167,6 +174,9 @@ static int xen_smp_intr_init(unsigned int cpu) 
	if (per_cpu(xen_callfuncsingle_irq, cpu) >= 0)

		unbind_from_irqhandler(per_cpu(xen_callfuncsingle_irq, cpu),

				       NULL);

	if (xen_hvm_domain())

		return rc;



	if (per_cpu(xen_irq_work, cpu) >= 0)

		unbind_from_irqhandler(per_cpu(xen_irq_work, cpu), NULL);
@@ -661,6 +671,7 @@ static void xen_hvm_cpu_die(unsigned int cpu) 
	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_callfuncsingle_irq, cpu), NULL);

	if (!xen_hvm_domain())

		unbind_from_irqhandler(per_cpu(xen_irq_work, cpu), NULL);

	xen_uninit_lock_cpu(cpu);

	xen_teardown_timer(cpu);