Messages in this thread Patch in this message | | | Date | Fri, 18 Nov 2011 16:02:55 -0800 | From | Greg KH <> | Subject | [19/26] xen:pvhvm: enable PVHVM VCPU placement when using more than 32 CPUs. |
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3.1-stable review patch. If anyone has any objections, please let me know.
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From: Zhenzhong Duan <zhenzhong.duan@oracle.com>
commit 90d4f5534d14815bd94c10e8ceccc57287657ecc upstream.
PVHVM running with more than 32 vcpus and pv_irq/pv_time enabled need VCPU placement to work, or else it will softlockup.
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Zhenzhong Duan <zhenzhong.duan@oracle.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
--- arch/x86/xen/enlighten.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
--- a/arch/x86/xen/enlighten.c +++ b/arch/x86/xen/enlighten.c @@ -1355,7 +1355,7 @@ static int __cpuinit xen_hvm_cpu_notify( int cpu = (long)hcpu; switch (action) { case CPU_UP_PREPARE: - per_cpu(xen_vcpu, cpu) = &HYPERVISOR_shared_info->vcpu_info[cpu]; + xen_vcpu_setup(cpu); if (xen_have_vector_callback) xen_init_lock_cpu(cpu); break; @@ -1385,7 +1385,6 @@ static void __init xen_hvm_guest_init(vo xen_hvm_smp_init(); register_cpu_notifier(&xen_hvm_cpu_notifier); xen_unplug_emulated_devices(); - have_vcpu_info_placement = 0; x86_init.irqs.intr_init = xen_init_IRQ; xen_hvm_init_time_ops(); xen_hvm_init_mmu_ops();
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