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== Comment: #0 - INDIRA P. JOGA <indira.pr...@in.ibm.com> - 2018-01-07 13:18:32
==
Problem Description:
===================
Not able to start the ubutnu1804 guest with more than 1 thread on ubuntu1804
KVM host machine
Steps to re-create:
==================
> Installed Ubuntu1804 on boslcp3 host.
root@boslcp3:/home# uname -a
Linux boslcp3 4.13.0-17-generic #20-Ubuntu SMP Mon Nov 6 10:03:08 UTC 2017
ppc64le ppc64le ppc64le GNU/Linux
root@boslcp3:/home# uname -r
4.13.0-17-generic
> Installed qemu-kvm libvirt-bin ubuntu-vm-builder bridge-utils packages
root@boslcp3:/home# virsh version
Compiled against library: libvirt 3.6.0
Using library: libvirt 3.6.0
Using API: QEMU 3.6.0
Running hypervisor: QEMU 2.10.1
> root@boslcp3:~# ppc64_cpu --smt
SMT is off
> Defined the guest boslcp3g1 from host machine
root@boslcp3:/home# virsh list --all
Id Name State
----------------------------------------------------
- boslcp3g1 shut off
Please cherry pick
commit 45c940ba490df28cb87b993981a5f63df6bbb8db
Author: Paul Mackerras <pau...@ozlabs.org>
Date: Fri Nov 18 17:43:30 2016 +1100
KVM: PPC: Book3S HV: Treat POWER9 CPU threads as independent subcores
> Started the guest and it fails with the error
root@boslcp3:~# virsh start --console boslcp3g1
error: Failed to start domain boslcp3g1
error: internal error: process exited while connecting to monitor:
2018-01-05T02:54:37.762120Z qemu-system-ppc64: -chardev pty,id=charserial0:
char device redirected to /dev/pts/3 (label charserial0)
2018-01-05T02:54:37.829236Z qemu-system-ppc64: Cannot support more than 1
threads on PPC with KVM
> Unable to start the guest with more than 1 Thread from Ubuntu1804 KVM
host machine.
XML:
****
root@boslcp3:/home# virsh dumpxml boslcp3g1
<domain type='kvm'>
<name>boslcp3g1</name>
<uuid>95374879-0ed3-4562-a00f-e47d9aaf285c</uuid>
<maxMemory slots='16' unit='KiB'>10485760</maxMemory>
<memory unit='KiB'>6291456</memory>
<currentMemory unit='KiB'>6291456</currentMemory>
<memoryBacking>
<hugepages>
<page size='2048' unit='KiB' nodeset='0'/>
</hugepages>
</memoryBacking>
<vcpu placement='static' current='16'>32</vcpu>
<resource>
<partition>/machine</partition>
</resource>
<os>
<type arch='ppc64le' machine='pseries-2.10'>hvm</type>
<boot dev='hd'/>
<boot dev='network'/>
<bootmenu enable='yes'/>
</os>
<features>
<acpi/>
<apic/>
</features>
<cpu mode='host-model' check='partial'>
<model fallback='forbid'>power9</model>
<topology sockets='2' cores='8' threads='2'/>
<numa>
<cell id='0' cpus='0-7' memory='3145728' unit='KiB'/>
<cell id='1' cpus='8-15' memory='3145728' unit='KiB'/>
</numa>
</cpu>
<clock offset='utc'/>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>coredump-restart</on_crash>
<devices>
<emulator>/usr/bin/qemu-system-ppc64</emulator>
<disk type='block' device='disk'>
<driver name='qemu' type='raw'/>
<source
dev='/dev/disk/by-id/wwn-0x600507680183050d28000000000002a4-part1'/>
<target dev='sda' bus='virtio'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x05'
function='0x0'/>
</disk>
<disk type='block' device='disk'>
<driver name='qemu' type='raw'/>
<source dev='wwn-0x600507680183050d28000000000002a4-part2'/>
<target dev='sdb' bus='virtio'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x06'
function='0x0'/>
</disk>
<disk type='block' device='disk'>
<driver name='qemu' type='raw'/>
<source dev='wwn-0x600507680183050d28000000000002a4-part3'/>
<target dev='sdc' bus='virtio'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x07'
function='0x0'/>
</disk>
<controller type='scsi' index='0' model='virtio-scsi'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x02'
function='0x0'/>
</controller>
<controller type='usb' index='0' model='qemu-xhci'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x03'
function='0x0'/>
</controller>
<controller type='pci' index='0' model='pci-root'>
<model name='spapr-pci-host-bridge'/>
<target index='0'/>
</controller>
<controller type='pci' index='1' model='pci-root'>
<model name='spapr-pci-host-bridge'/>
<target index='1'/>
</controller>
<interface type='direct'>
<mac address='52:54:00:e5:81:1f'/>
<source dev='enP2p1s0f0' mode='bridge'/>
<model type='virtio'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01'
function='0x0'/>
</interface>
<serial type='pty'>
<target port='0'/>
<address type='spapr-vio' reg='0x30000000'/>
</serial>
<console type='pty'>
<target type='serial' port='0'/>
<address type='spapr-vio' reg='0x30000000'/>
</console>
<memballoon model='virtio'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x04'
function='0x0'/>
</memballoon>
<panic model='pseries'/>
</devices>
</domain>
** Affects: linux (Ubuntu)
Importance: Undecided
Assignee: Ubuntu on IBM Power Systems Bug Triage (ubuntu-power-triage)
Status: New
** Tags: architecture-ppc64le bugnameltc-163170 severity-high
targetmilestone-inin---
--
ISST-LTE:KVM:Ubuntu1804:BostonLC:boslcp3: Unable to start the guest with more
than 1 thread on ubuntu1804 KVM host machine.
https://bugs.launchpad.net/bugs/1742892
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