[Qemu-devel] Some guest VCPUs are missing local timer interrupts upon mi

From:

Rom Freiman

Subject:

[Qemu-devel] Some guest VCPUs are missing local timer interrupts upon migration

Date:

Wed, 27 Aug 2014 14:11:49 +0300

Hi,

Im trying to migrate a VM (Ubuntu 14.04 which uses a tickless kernel) from node to node (2-4 vcpus, kvm is used), but once the VM is migrated, some of the VCPUs do not get local timer interrupts. Other interrupts are functional (cat /proc/interrupts).

Which flow is in charge of "injecting" the timers into the guest kernel? How can I debug the issue? How dos libvirt is involved in setting the timers?

The migration is done via virsh command line.

I'm using slightly different qemu code (with modifications), based on 1.6.1 and libvirt 1.0.5.8.

Thanks,

Rom

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