** Changed in: linux (Ubuntu)
Assignee: Ubuntu on IBM Power Systems Bug Triage (ubuntu-power-triage) =>
Canonical Kernel Team (canonical-kernel-team)
** Changed in: linux (Ubuntu)
Importance: Undecided => High
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https://bugs.launchpad.net/bugs/1818645
Title:
Ubuntu18.04.01: [Power9] power8 Compat guest(RHEL7.6) crashes during
guest boot with > 256G of memory (kernel/kvm)
Status in The Ubuntu-power-systems project:
Triaged
Status in linux package in Ubuntu:
New
Bug description:
== Comment: #0 - Satheesh Rajendran <sathe...@in.ibm.com> - 2019-02-28
04:38:22 ==
---Problem Description---
Power8 Compat guest(RHEL 7.6) crashes during guest boot with > 256G of memory
(kernel/kvm)
Contact Information = sathe...@in.ibm.com
---uname output---
Host Kernel: 4.15.0-1016-ibm-gt
ii qemu-system-ppc 1:2.11+dfsg-
1ubuntu7.8-1ibm3 ppc64el QEMU
full system emulation binaries (ppc)
ii libvirt-bin 4.0.0-1ubuntu8.6
ppc64el programs for the libvirt library
Guest kernel: 3.10.0-957.5.1.el7.ppc64le (rhel7.6 zstream)
Machine Type = power9 ppc64le
---Steps to Reproduce---
1. Boot a power8 compat guest with memory >256G
virsh define avocado-vt-vm1;virsh start --console avocado-vt-vm1 (guest xml
sosreport attached)
----Guest crashes while booting
2019-02-28 10:36:44.752+0000: starting up libvirt version: 4.0.0, package:
1ubuntu8.6 (Christian Ehrhardt <christian.ehrha...@canonical.com> Fri, 09 Nov
2018 07:42:01 +0100), qemu version: 2.11.1(Debian
1:2.11+dfsg-1ubuntu7.8-1ibm3), hostname: cs-host-f37-ac922-3.pok.ibm.com
LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
QEMU_AUDIO_DRV=none /usr/bin/qemu-system-ppc64 -name
guest=avocado-vt-vm1,debug-threads=on -S -object
secret,id=masterKey0,format=raw,file=/var/lib/libvirt/qemu/domain-15-avocado-vt-vm1/master-key.aes
-machine pseries-2.11,accel=kvm,usb=off,dump-guest-core=off -m 264192
-realtime mlock=off -smp 256,sockets=256,cores=1,threads=1 -uuid
f4e14f88-bf1b-4cc3-b6d6-958d514d6c18 -display none -no-user-config -nodefaults
-chardev
socket,id=charmonitor,path=/var/lib/libvirt/qemu/domain-15-avocado-vt-vm1/monitor.sock,server,nowait
-mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-shutdown
-boot strict=on -device qemu-xhci,id=usb,bus=pci.0,addr=0x3 -device
virtio-scsi-pci,id=scsi0,bus=pci.0,addr=0x2 -device
virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x4 -drive
file=/home/sath/avocado-fvt-wrapper/data/avocado-vt/images/rhel76-ppc64le.qcow2,format=qcow2,if=none,id=drive-scsi0-0-0-0
-device
scsi-hd,bus=scsi0.0,channel=0,scsi-id=0,lun=0,drive=drive-scsi0-0-0-0,id=scsi0-0-0-0,bootindex=1
-netdev tap,fd=28,id=hostnet0,vhost=on,vhostfd=30 -device
virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:fc:fd:fe,bus=pci.0,addr=0x1
-chardev pty,id=charserial0 -device
spapr-vty,chardev=charserial0,id=serial0,reg=0x30000000 -chardev
socket,id=charchannel0,path=/var/lib/libvirt/qemu/channel/target/domain-15-avocado-vt-vm1/org.qemu.guest_agent.0,server,nowait
-device
virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=org.qemu.guest_agent.0
-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5 -msg timestamp=on
2019-02-28 10:36:44.759+0000: 19598: info : libvirt version: 4.0.0, package:
1ubuntu8.6 (Christian Ehrhardt <christian.ehrha...@canonical.com> Fri, 09 Nov
2018 07:42:01 +0100)
2019-02-28 10:36:44.759+0000: 19598: info : hostname: cs-host-f37-ac922-3
2019-02-28 10:36:44.759+0000: 19598: info : virObjectUnref:350 :
OBJECT_UNREF: obj=0x76d594111710
2019-02-28T10:36:44.781703Z qemu-system-ppc64: -chardev pty,id=charserial0:
char device redirected to /dev/pts/3 (label charserial0)
2019-02-28T10:36:44.781945Z qemu-system-ppc64: warning: Number of SMP cpus
requested (256) exceeds the recommended cpus supported by KVM (128)
2019-02-28T10:36:44.781953Z qemu-system-ppc64: warning: Number of
hotpluggable cpus requested (256) exceeds the recommended cpus supported by KVM
(128)
2019-02-28 10:37:18.060+0000: shutting down, reason=crashed
2019-02-28T10:37:18.071969Z qemu-system-ppc64: terminating on signal 15 from
pid 14056 (/usr/sbin/libvirtd)
*Additional Instructions for sathe...@in.ibm.com:
-Post a private note with access information to the machine that the bug is
occuring on.
== Comment: #3 - Satheesh Rajendran <sathe...@in.ibm.com> - 2019-02-28
04:51:45 ==
Possible Upstream fix:
https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next&id=46dec40fb741f00f1864580130779aeeaf24fb3d
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