[PATCH 0/4] Fix for LP:#1791286

[Gavin Guo]

Sorry, my fault, it's Trusty. I forgot to add [Trusty][SRU].

On Wed, Sep 12, 2018 at 3:35 PM, Stefan Bader
<stefan.bader at canonical.com> wrote:
> On 10.09.2018 16:23, Gavin Guo wrote:
>> BugLink: https://bugs.launchpad.net/bugs/1791286
>>
>> [Impact]
>>
>> After the VM(Guest OS is Windows Server 2012R2) has been live-migrated
>> serveral times, the screen is blackout or freeze when the VM is
>> connected via VNC.
>>
>> The Windows Guest OS Server has been investigated that all of kernel
>> threads of Windows Server OS are waiting(idle state) for interrupt
>> request(IRQ) from hypervisor.
>>
>> The following environment is tested:
>> * Host OS: Ubuntu 14.04(kernel 3.13.0-40.69)
>> * qemu-kvm_2.0.0+dfsg-2ubuntu1.22
>> * libvert-bin_1.2.2-0ubuntu13.1.5
>> * nova-compute_1:2014.2.3-0ubuntu1.2~cloud0
>> * GuestOS: Windows Server 2012R2
>> * virtio-win-0.1.126
>>
>>
>> [Fix]
>>
>> The patch set is needed:
>>
>> 673f7b4257a1 KVM: ioapic: reinject pending interrupts on KVM_SET_IRQCHIP
>> 44847dea7975 KVM: ioapic: extract body of kvm_ioapic_set_irq
>> 0bc830b05c66 KVM: ioapic: clear IRR for edge-triggered interrupts at delivery
>> 0b10a1c87a2b KVM: ioapic: merge ioapic_deliver into ioapic_service
>>
>>
>> [Test]
>>
>> Prepare two machines with the same environment mentioned above and run
>> the following script.
>>
>> #!/bin/bash
>> INSTANCE="test"
>>
>> FROM="elite"
>> virsh -c qemu+ssh://ubuntu@${FROM}/system list| grep -q ${INSTANCE}
>> if [[ $? != 0 ]]; then
>> FROM="dixie";
>> TO="elite";
>> else
>> TO="dixie"
>> fi
>>
>> echo "= Migrating ${INSTANCE} from ${FROM} to ${TO} ="
>> ssh ubuntu@${FROM} -- virsh migrate --live --domain ${INSTANCE}
>> --desturi qemu+ssh://ubuntu@${TO}/system
>>
>>
>> The VNC script I use to keep track of the VNC console is:
>>
>> #!/bin/bash
>> INSTANCE="test"
>>
>> while true; do
>> HOST="elite"
>> virsh -c qemu+ssh://ubuntu@${HOST}/system list| grep -q ${INSTANCE}
>> if [[ $? != 0 ]]; then HOST="dixie"; fi
>>
>> virt-viewer -c qemu+ssh://ubuntu@${HOST}/system test
>> sleep 3
>> done
>>
>>
>> Paolo Bonzini (4):
>>   KVM: ioapic: merge ioapic_deliver into ioapic_service
>>   KVM: ioapic: clear IRR for edge-triggered interrupts at delivery
>>   KVM: ioapic: extract body of kvm_ioapic_set_irq
>>   KVM: ioapic: reinject pending interrupts on KVM_SET_IRQCHIP
>>
>>  virt/kvm/ioapic.c | 109 +++++++++++++++++++++++++++++++++++-------------------
>>  1 file changed, 70 insertions(+), 39 deletions(-)
>>
>
> For what (release) is this? I don't want to hunt breadcrumbs following mailing
> list submissions.
>
> -Stefan
>