I think this issue is with this set of storvsc changes in .67:
* [Hyper-V] Bug fixes for storvsc (tagged queuing, error conditions)
(LP: #1663687)
- scsi: storvsc: Enable tracking of queue depth
- scsi: storvsc: Remove the restriction on max segment size
- scsi: storvsc: Enable multi-queue support
- scsi: storvsc: use tagged SRB requests if supported by the device
- scsi: storvsc: properly handle SRB_ERROR when sense message is present
- scsi: storvsc: properly set residual data length on errors
We know of a regression with the last patch in this list and it is fixed
with this upstream commit:
commit f1c635b439a5c01776fe3a25b1e2dc546ea82e6f
Author: Stephen Hemminger <[email protected]>
Date: Tue Mar 7 09:15:53 2017 -0800
scsi: storvsc: Workaround for virtual DVD SCSI version
Hyper-V host emulation of SCSI for virtual DVD device reports SCSI
version 0 (UNKNOWN) but is still capable of supporting REPORTLUN.
Without this patch, a GEN2 Linux guest on Hyper-V will not boot 4.11
successfully with virtual DVD ROM device. What happens is that the SCSI
scan process falls back to doing sequential probing by INQUIRY. But the
storvsc driver has a previous workaround that masks/blocks all errors
reports from INQUIRY (or MODE_SENSE) commands. This workaround causes
the scan to then populate a full set of bogus LUN's on the target and
then sends kernel spinning off into a death spiral doing block reads on
the non-existent LUNs.
By setting the correct blacklist flags, the target with the DVD device
is scanned with REPORTLUN and that works correctly.
Patch needs to go in current 4.11, it is safe but not necessary in older
kernels.
Signed-off-by: Stephen Hemminger <[email protected]>
Reviewed-by: K. Y. Srinivasan <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>
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https://bugs.launchpad.net/bugs/1679898
Title:
[Hyper-V] Ubuntu VM crash during Hyper-V backup or live migration
after installing kernel 4.4.0-67 or later
Status in linux package in Ubuntu:
Triaged
Status in linux source package in Xenial:
Triaged
Bug description:
Description: Ubuntu 14.04.5 LTS
Release: 14.04
Hi, after installing kernel 4.4.0-67 or later I cannot backup my Ubuntu VM's
on Hyper-V.
Microsoft Hyper-v 2012r2 Gen2 VMs
See Attachment for what happens is immediately after backup starts I
get an error.
Eventually the kernel reports it has run out of memory and the machine
just continuously scrolls errors message related to page allocation.
When reseting the virtual machine no logs can be found of the problem.
kernel 4.4.0-72-generic problem still here
DistroRelease: Ubuntu 14.04
InstallationDate: Installed on 2016-02-20 (409 days ago)
InstallationMedia: Ubuntu-Server 14.04.3 LTS "Trusty Tahr" - Beta amd64
(20150805)
Package: linux-image-4.4.0-72-generic 4.4.0-72.93~14.04.1
PackageArchitecture: amd64
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
LANG=ru_RU.UTF-8
SHELL=/bin/bash
ProcVersionSignature: Ubuntu 4.4.0-72.93~14.04.1-generic 4.4.49
SourcePackage: linux-lts-xenial
Tags: trusty
Uname: Linux 4.4.0-72-generic x86_64
---
AlsaDevices:
total 0
crw-rw---- 1 root audio 116, 1 Apr 5 12:05 seq
crw-rw---- 1 root audio 116, 33 Apr 5 12:05 timer
AplayDevices: Error: [Errno 2] No such file or directory
ApportVersion: 2.14.1-0ubuntu3.23
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq',
'/dev/snd/timer'] failed with exit code 1:
CRDA: Error: [Errno 2] No such file or directory
DistroRelease: Ubuntu 14.04
HibernationDevice: RESUME=/dev/mapper/ubuntu--vg-swap_1
InstallationDate: Installed on 2016-02-20 (409 days ago)
InstallationMedia: Ubuntu-Server 14.04.3 LTS "Trusty Tahr" - Beta amd64
(20150805)
IwConfig:
lo no wireless extensions.
eth1 no wireless extensions.
eth0 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)
PciMultimedia:
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
LANG=C
SHELL=/bin/bash
ProcFB: 0 hyperv_fb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-72-generic.efi.signed
root=/dev/mapper/ubuntu--vg-root ro
ProcVersionSignature: Ubuntu 4.4.0-72.93~14.04.1-generic 4.4.49
RelatedPackageVersions:
linux-restricted-modules-4.4.0-72-generic N/A
linux-backports-modules-4.4.0-72-generic N/A
linux-firmware 1.127.23
RfKill: Error: [Errno 2] No such file or directory
Tags: trusty
Uname: Linux 4.4.0-72-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:
_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: 5894-4187-8369-8212-0547-2747-15
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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