Ballooning works. Hot Add has issues.
The original issue as reported has been resolved.
Initially, memory is successfully hot added to the VM. As demand
continues to increase,
no additional memory is hot added. Eventually a hung task message is
logged in syslog.
The call trace shows hot_add_req() on the call stack. At this point,
attempting to
shutdown the system with "init 0" results in the system hung during the
shutdown. The
console is showing messages of:
INFO: task kworker/0:1:1250 blocked for more than 120 seconds.
Not tainted 3.16.0-30-generic #40~14.04.1-Ubuntu
INFO: task systemd-udev:1317 blocked for more than 120 seconds.
Not tainted 3.16.0-30-generic #40~14.04.1-Ubuntu
See attached file for call traces in syslog.
Test environment
Host: Windows Server 2012 R2
VM: Ubuntu 14.04, upgraded to current packages (apt-get upgrade)
VM Dynammic memory configuration
Minimum Memory : 512MB
Startup Memory : 512MB
Maximum Memory : 4096
Test is to run 8 instances of stressapptest where each instance consumes
128MB for 90 seconds. There is a 5 second delay between starting each
instance of stressapptest.
** Attachment added: "syslog.txt"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1294283/+attachment/4422989/+files/syslog.txt
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https://bugs.launchpad.net/bugs/1294283
Title:
Memory balloning in Hyper-V generation 2 does not work
Status in linux package in Ubuntu:
Confirmed
Bug description:
The generation 2 VM has been assinged a memory range of 512 MiB-
4096MiB with a starting memory of 512 MiB. It should get additional
memory when needed, but the total available memory in the VM stays at
the intial 512 MiB and the kernel starts swapping instead of
allocating more memory from the host.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-18-generic 3.13.0-18.38
ProcVersionSignature: Ubuntu 3.13.0-18.38-generic 3.13.6
Uname: Linux 3.13.0-18-generic x86_64
ApportVersion: 2.13.3-0ubuntu1
Architecture: amd64
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq',
'/dev/snd/timer'] failed with exit code 1:
CurrentDesktop: XFCE
Date: Tue Mar 18 19:28:54 2014
HibernationDevice: RESUME=UUID=0d223c65-8c7e-41b4-95b3-05b22ff4679b
InstallationDate: Installed on 2014-03-12 (6 days ago)
InstallationMedia: Xubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140312)
IwConfig:
eth0 no wireless extensions.
lo no wireless extensions.
Lspci:
Lsusb: Error: command ['lsusb'] failed with exit code 1: unable to initialize
libusb: -99
MachineType: Microsoft Corporation Virtual Machine
ProcFB: 0 hyperv_fb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-18-generic.efi.signed
root=UUID=61b52c1b-300d-4c30-8966-db1745f4a4bc ro video=hyperv_fb:1920x1080
quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.13.0-18-generic N/A
linux-backports-modules-3.13.0-18-generic N/A
linux-firmware 1.126
RfKill:
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/26/2012
dmi.bios.vendor: Microsoft Corporation
dmi.bios.version: Hyper-V UEFI Release v1.0
dmi.board.asset.tag: None
dmi.board.name: Virtual Machine
dmi.board.vendor: Microsoft Corporation
dmi.board.version: Hyper-V UEFI Release v1.0
dmi.chassis.asset.tag: 6485-6574-9248-6162-4701-6267-50
dmi.chassis.type: 3
dmi.chassis.vendor: Microsoft Corporation
dmi.chassis.version: Hyper-V UEFI Release v1.0
dmi.modalias:
dmi:bvnMicrosoftCorporation:bvrHyper-VUEFIReleasev1.0:bd11/26/2012:svnMicrosoftCorporation:pnVirtualMachine:pvrHyper-VUEFIReleasev1.0:rvnMicrosoftCorporation:rnVirtualMachine:rvrHyper-VUEFIReleasev1.0:cvnMicrosoftCorporation:ct3:cvrHyper-VUEFIReleasev1.0:
dmi.product.name: Virtual Machine
dmi.product.version: Hyper-V UEFI Release v1.0
dmi.sys.vendor: Microsoft Corporation
---
ApportVersion: 2.14-0ubuntu1
Architecture: amd64
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq',
'/dev/snd/timer'] failed with exit code 1:
CurrentDesktop: XFCE
DistroRelease: Ubuntu 14.04
HibernationDevice: RESUME=UUID=2673d21f-4b48-43f1-9b06-8c141a492700
InstallationDate: Installed on 2014-03-29 (9 days ago)
InstallationMedia: Xubuntu 14.04 LTS "Trusty Tahr" - Beta amd64 (20140326)
IwConfig:
eth0 no wireless extensions.
lo no wireless extensions.
Lspci:
Lsusb: Error: command ['lsusb'] failed with exit code 1: unable to initialize
libusb: -99
MachineType: Microsoft Corporation Virtual Machine
Package: linux (not installed)
ProcFB: 0 hyperv_fb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-22-generic.efi.signed
root=UUID=cccf5e59-012e-4ab5-a6ba-08850e60aba1 ro video=hyperv_fb:1920x1080
quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 3.13.0-22.44-generic 3.13.8
RelatedPackageVersions:
linux-restricted-modules-3.13.0-22-generic N/A
linux-backports-modules-3.13.0-22-generic N/A
linux-firmware 1.127
RfKill:
Tags: trusty
Uname: Linux 3.13.0-22-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 11/26/2012
dmi.bios.vendor: Microsoft Corporation
dmi.bios.version: Hyper-V UEFI Release v1.0
dmi.board.asset.tag: None
dmi.board.name: Virtual Machine
dmi.board.vendor: Microsoft Corporation
dmi.board.version: Hyper-V UEFI Release v1.0
dmi.chassis.asset.tag: 6485-6574-9248-6162-4701-6267-50
dmi.chassis.type: 3
dmi.chassis.vendor: Microsoft Corporation
dmi.chassis.version: Hyper-V UEFI Release v1.0
dmi.modalias:
dmi:bvnMicrosoftCorporation:bvrHyper-VUEFIReleasev1.0:bd11/26/2012:svnMicrosoftCorporation:pnVirtualMachine:pvrHyper-VUEFIReleasev1.0:rvnMicrosoftCorporation:rnVirtualMachine:rvrHyper-VUEFIReleasev1.0:cvnMicrosoftCorporation:ct3:cvrHyper-VUEFIReleasev1.0:
dmi.product.name: Virtual Machine
dmi.product.version: Hyper-V UEFI Release v1.0
dmi.sys.vendor: Microsoft Corporation
---
ApportVersion: 2.14.1-0ubuntu2
Architecture: amd64
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq',
'/dev/snd/timer'] failed with exit code 1:
CurrentDesktop: XFCE
DistroRelease: Ubuntu 14.04
HibernationDevice: RESUME=UUID=2673d21f-4b48-43f1-9b06-8c141a492700
InstallationDate: Installed on 2014-03-29 (12 days ago)
InstallationMedia: Xubuntu 14.04 LTS "Trusty Tahr" - Beta amd64 (20140326)
IwConfig:
eth0 no wireless extensions.
lo no wireless extensions.
Lspci:
Lsusb: Error: command ['lsusb'] failed with exit code 1: unable to initialize
libusb: -99
MachineType: Microsoft Corporation Virtual Machine
Package: linux (not installed)
ProcFB: 0 hyperv_fb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-23-generic.efi.signed
root=UUID=cccf5e59-012e-4ab5-a6ba-08850e60aba1 ro video=hyperv_fb:1920x1080
quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 3.13.0-23.45-generic 3.13.8
RelatedPackageVersions:
linux-restricted-modules-3.13.0-23-generic N/A
linux-backports-modules-3.13.0-23-generic N/A
linux-firmware 1.127
RfKill:
Tags: trusty
Uname: Linux 3.13.0-23-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 11/26/2012
dmi.bios.vendor: Microsoft Corporation
dmi.bios.version: Hyper-V UEFI Release v1.0
dmi.board.asset.tag: None
dmi.board.name: Virtual Machine
dmi.board.vendor: Microsoft Corporation
dmi.board.version: Hyper-V UEFI Release v1.0
dmi.chassis.asset.tag: 6485-6574-9248-6162-4701-6267-50
dmi.chassis.type: 3
dmi.chassis.vendor: Microsoft Corporation
dmi.chassis.version: Hyper-V UEFI Release v1.0
dmi.modalias:
dmi:bvnMicrosoftCorporation:bvrHyper-VUEFIReleasev1.0:bd11/26/2012:svnMicrosoftCorporation:pnVirtualMachine:pvrHyper-VUEFIReleasev1.0:rvnMicrosoftCorporation:rnVirtualMachine:rvrHyper-VUEFIReleasev1.0:cvnMicrosoftCorporation:ct3:cvrHyper-VUEFIReleasev1.0:
dmi.product.name: Virtual Machine
dmi.product.version: Hyper-V UEFI Release v1.0
dmi.sys.vendor: Microsoft Corporation
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