Since the fix is already included in the disco kernel I'm changing the root
'linux (Ubuntu)' entry (that is usually used to track the current development
release kernel) to Fix Released.
And because the bionic entry is Fix Committed I adjust the project entry and
change it to Fix Committed, too.
** Changed in: linux (Ubuntu)
Status: New => Fix Released
** Changed in: ubuntu-power-systems
Status: Triaged => Fix Committed
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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:
Fix Committed
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Bionic:
Fix Committed
Bug description:
== SRU Justification ==
Rebooting a PowerPC VM with > 256G of memory results in a guest crash.
== Fix ==
Backport commit 46dec40fb741 ("KVM: PPC: Book3S HV: Don't truncate
HPTE index in xlate function").
== Regression Potential ==
Low. Fix is trivial.
== Test Case ==
Create a PowerPC VM with > 256G of memory and reboot it repeatedly.
== Original description ==
== Comment: #0 - Satheesh Rajendran <[email protected]> - 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 = [email protected]
---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 <[email protected]> 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 <[email protected]> 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 [email protected]:
-Post a private note with access information to the machine that the bug is
occuring on.
== Comment: #3 - Satheesh Rajendran <[email protected]> - 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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