From: Konrad Rzeszutek Wilk Date: Mon, 21 May 2012 13:19:38 +0000 (-0400) Subject: xen/smp: unbind irqworkX when unplugging vCPUs. X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=2f1bd67d544d3c086fb5101513f4b6c8f4291b43;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git xen/smp: unbind irqworkX when unplugging vCPUs. The git commit 1ff2b0c303698e486f1e0886b4d9876200ef8ca5 "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 --- diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c index 3ec3f8eb19fc..ce9e98b1e69c 100644 --- a/arch/x86/xen/smp.c +++ b/arch/x86/xen/smp.c @@ -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_debug_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_teardown_timer(cpu);