I tried -no-hpet, was still able to replicate the 'lapic' issue. I find it interesting that I can only trigger it if the vm has been running awhile.
On Tue, Jan 14, 2014 at 11:08 PM, Marcus Sorensen <shadow...@gmail.com> wrote: > Ok, more information. The console spews 'lapic increasing min_delta_ns > to ################' when this happens. > > On Tue, Jan 14, 2014 at 8:31 AM, Marcus Sorensen <shadow...@gmail.com> wrote: >> Does anyone have tips on troubleshooting live migration? I've got >> several E5-2650 servers running in test environment, kernel 3.10.26 >> and qemu 1.7.0. If I start a VM guest (say ubuntu, debian, or centos), >> I can migrate it around from host to host to host just fine, but if I >> wait awhile (say 1 hour), I try to migrate and it succeeds but the >> guest is hosed. No longer pings, cpu is thrashing. I've tried to >> strace it and don't see anything that other working hosts aren't >> doing, and I've tried gdb but I'm not entirely sure what I'm doing. I >> tried downgrading to qemu 1.6.1. I've found dozens of reports of such >> behavior, but they're all due to other things (migrating between >> different host CPUs, someone thinking it's virtio or memballoon only >> to later find a fix like changing machine type, etc). I'm at a loss. >> This seems to work just fine with stock CentOS builds. >> >> I'd be happy to try to capture a core if someone is willing to look at it. >> >> Here's an example xml: >> >> <domain type='kvm'> >> <name>VM12</name> >> <uuid>dd25acfc-e24d-4de6-814c-72ac465bc208</uuid> >> <description></description> >> <memory unit='KiB'>4194304</memory> >> <currentMemory unit='KiB'>4194304</currentMemory> >> <vcpu placement='static'>2</vcpu> >> <cputune> >> <shares>2000</shares> >> </cputune> >> <resource> >> <partition>/machine</partition> >> </resource> >> <os> >> <type arch='x86_64' machine='pc-i440fx-1.7'>hvm</type> >> <boot dev='cdrom'/> >> <boot dev='hd'/> >> </os> >> <features> >> <acpi/> >> <apic/> >> <pae/> >> </features> >> <cpu> >> </cpu> >> <clock offset='utc'> >> <timer name='kvmclock' tickpolicy='catchup'/> >> </clock> >> <on_poweroff>destroy</on_poweroff> >> <on_reboot>restart</on_reboot> >> <on_crash>destroy</on_crash> >> <devices> >> <emulator>/usr/bin/qemu-kvm</emulator> >> <disk type='block' device='disk'> >> <driver name='qemu' type='raw' cache='none'/> >> <source dev='/dev/sdc'/> >> <target dev='vda' bus='virtio'/> >> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' >> function='0x0'/> >> </disk> >> <disk type='file' device='cdrom'> >> <driver name='qemu' type='raw' cache='none'/> >> <target dev='hdc' bus='ide'/> >> <readonly/> >> <address type='drive' controller='0' bus='1' target='0' unit='0'/> >> </disk> >> <controller type='ide' index='0'> >> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' >> function='0x1'/> >> </controller> >> <controller type='virtio-serial' index='0'> >> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' >> function='0x0'/> >> </controller> >> <controller type='usb' index='0'> >> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' >> function='0x2'/> >> </controller> >> <controller type='pci' index='0' model='pci-root'/> >> <interface type='bridge'> >> <mac address='02:00:09:66:00:18'/> >> <source bridge='br1000192'/> >> <model type='virtio'/> >> <bandwidth> >> <inbound average='128000' peak='128000'/> >> <outbound average='128000' peak='128000'/> >> </bandwidth> >> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' >> function='0x0'/> >> </interface> >> <serial type='pty'> >> <target port='0'/> >> </serial> >> <console type='pty'> >> <target type='serial' port='0'/> >> </console> >> <channel type='unix'> >> <source mode='bind' path='/var/lib/libvirt/qemu/VM12.agent'/> >> <target type='virtio' name='VM12.vport'/> >> <address type='virtio-serial' controller='0' bus='0' port='1'/> >> </channel> >> <input type='tablet' bus='usb'/> >> <input type='mouse' bus='ps2'/> >> <graphics type='vnc' port='-1' autoport='yes' listen='0.0.0.0'> >> <listen type='address' address='0.0.0.0'/> >> </graphics> >> <video> >> <model type='cirrus' vram='9216' heads='1'/> >> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' >> function='0x0'/> >> </video> >> <memballoon model='virtio'> >> <address type='pci' domain='0x0000' bus='0x00' slot='0x06' >> function='0x0'/> >> </memballoon> >> </devices> >> <seclabel type='none'/> >> </domain>
