[Kernel-packages] [Bug 1496927] Re: [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

[Launchpad Bug Tracker]

This bug was fixed in the package linux - 4.2.0-35.40

---
linux (4.2.0-35.40) wily; urgency=low

  [ Brad Figg ]

  * Release Tracking Bug
- LP: #1557706

  [ Upstream Kernel Changes ]

  * Revert "workqueue: make sure delayed work run in local cpu"
- LP: #1556269
  * Revert "ALSA: hda - Fix noise on Gigabyte Z170X mobo"
- LP: #1556269
  * KVM: VMX: Fix host initiated access to guest MSR_TSC_AUX
- LP: #1552592
  * locking/qspinlock: Move __ARCH_SPIN_LOCK_UNLOCKED to qspinlock_types.h
- LP: #1545330
  * [media] usbvision fix overflow of interfaces array
- LP: #1556269
  * [media] usbvision: fix crash on detecting device with invalid
configuration
- LP: #1556269
  * ASN.1: Fix non-match detection failure on data overrun
- LP: #1556269
  * iw_cxgb3: Fix incorrectly returning error on success
- LP: #1556269
  * EVM: Use crypto_memneq() for digest comparisons
- LP: #1556269
  * vmstat: explicitly schedule per-cpu work on the CPU we need it to run
on
- LP: #1556269
  * x86/entry/compat: Add missing CLAC to entry_INT80_32
- LP: #1556269
  * iio-light: Use a signed return type for ltr501_match_samp_freq()
- LP: #1556269
  * iio: add IIO_TRIGGER dependency to STK8BA50
- LP: #1556269
  * iio: add HAS_IOMEM dependency to VF610_ADC
- LP: #1556269
  * iio: dac: mcp4725: set iio name property in sysfs
- LP: #1556269
  * iommu/vt-d: Fix 64-bit accesses to 32-bit DMAR_GSTS_REG
- LP: #1556269
  * iio: light: acpi-als: Report data as processed
- LP: #1556269
  * iio:adc:ti_am335x_adc Fix buffered mode by identifying as software
buffer.
- LP: #1556269
  * ASoC: rt5645: fix the shift bit of IN1 boost
- LP: #1556269
  * ARCv2: STAR 9000950267: Handle return from intr to Delay Slot #2
- LP: #1556269
  * cgroup: make sure a parent css isn't offlined before its children
- LP: #1556269
  * ARM: OMAP2+: Fix wait_dll_lock_timed for rodata
- LP: #1556269
  * ARM: OMAP2+: Fix l2dis_3630 for rodata
- LP: #1556269
  * ARM: OMAP2+: Fix save_secure_ram_context for rodata
- LP: #1556269
  * ARM: OMAP2+: Fix l2_inv_api_params for rodata
- LP: #1556269
  * ARM: OMAP2+: Fix ppa_zero_params and ppa_por_params for rodata
- LP: #1556269
  * rtlwifi: rtl8821ae: Fix 5G failure when EEPROM is incorrectly encoded
- LP: #1556269
  * PCI/AER: Flush workqueue on device remove to avoid use-after-free
- LP: #1556269
  * ARM: dts: Fix wl12xx missing clocks that cause hangs
- LP: #1556269
  * libata: disable forced PORTS_IMPL for >= AHCI 1.3
- LP: #1556269
  * mac80211: Requeue work after scan complete for all VIF types.
- LP: #1556269
  * rfkill: fix rfkill_fop_read wait_event usage
- LP: #1556269
  * ARM: dts: at91: sama5d4: fix instance id of DBGU
- LP: #1556269
  * ARM: dts: at91: sama5d4ek: add phy address and IRQ for macb0
- LP: #1556269
  * ARM: dts: at91: sama5d4 xplained: fix phy0 IRQ type
- LP: #1556269
  * crypto: shash - Fix has_key setting
- LP: #1556269
  * Input: vmmouse - fix absolute device registration
- LP: #1556269
  * spi: atmel: fix gpio chip-select in case of non-DT platform
- LP: #1556269
  * drm/i915/dp: fall back to 18 bpp when sink capability is unknown
- LP: #1556269
  * ALSA: usb-audio: Fix OPPO HA-1 vendor ID
- LP: #1556269
  * ALSA: usb-audio: Add native DSD support for PS Audio NuWave DAC
- LP: #1556269
  * ALSA: usb-audio: Add quirk for Microsoft LifeCam HD-6000
- LP: #1556269
  * target: Fix WRITE_SAME/DISCARD conversion to linux 512b sectors
- LP: #1556269
  * crypto: algif_hash - wait for crypto_ahash_init() to complete
- LP: #1556269
  * iio: inkern: fix a NULL dereference on error
- LP: #1556269
  * iio: pressure: mpl115: fix temperature offset sign
- LP: #1556269
  * intel_scu_ipcutil: underflow in scu_reg_access()
- LP: #1556269
  * ALSA: seq: Fix race at closing in virmidi driver
- LP: #1556269
  * ALSA: rawmidi: Remove kernel WARNING for NULL user-space buffer check
- LP: #1556269
  * ALSA: pcm: Fix potential deadlock in OSS emulation
- LP: #1556269
  * ALSA: seq: Fix yet another races among ALSA timer accesses
- LP: #1556269
  * ALSA: timer: Code cleanup
- LP: #1556269
  * ALSA: timer: Fix link corruption due to double start or stop
- LP: #1556269
  * libata: fix sff host state machine locking while polling
- LP: #1556269
  * MIPS: Fix buffer overflow in syscall_get_arguments()
- LP: #1556269
  * cputime: Prevent 32bit overflow in time[val|spec]_to_cputime()
- LP: #1556269
  * drm: add helper to check for wc memory support
- LP: #1556269
  * drm/radeon: mask out WC from BO on unsupported arches
- LP: #1556269
  * drm/amdgpu: mask out WC from BO on unsupported arches
- LP: #1556269
  * ASoC: dpcm: fix the BE state on hw_free
- LP: #1556269
  * drm/amdgpu: move gmc7 support out of CIK dependency
- LP: #1556269
  * drm/amdgpu: iceland use CI based 

[Kernel-packages] [Bug 1496927] Re: [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

[Launchpad Bug Tracker]

This bug was fixed in the package linux - 4.2.0-35.40

---
linux (4.2.0-35.40) wily; urgency=low

  [ Brad Figg ]

  * Release Tracking Bug
- LP: #1557706

  [ Upstream Kernel Changes ]

  * Revert "workqueue: make sure delayed work run in local cpu"
- LP: #1556269
  * Revert "ALSA: hda - Fix noise on Gigabyte Z170X mobo"
- LP: #1556269
  * KVM: VMX: Fix host initiated access to guest MSR_TSC_AUX
- LP: #1552592
  * locking/qspinlock: Move __ARCH_SPIN_LOCK_UNLOCKED to qspinlock_types.h
- LP: #1545330
  * [media] usbvision fix overflow of interfaces array
- LP: #1556269
  * [media] usbvision: fix crash on detecting device with invalid
configuration
- LP: #1556269
  * ASN.1: Fix non-match detection failure on data overrun
- LP: #1556269
  * iw_cxgb3: Fix incorrectly returning error on success
- LP: #1556269
  * EVM: Use crypto_memneq() for digest comparisons
- LP: #1556269
  * vmstat: explicitly schedule per-cpu work on the CPU we need it to run
on
- LP: #1556269
  * x86/entry/compat: Add missing CLAC to entry_INT80_32
- LP: #1556269
  * iio-light: Use a signed return type for ltr501_match_samp_freq()
- LP: #1556269
  * iio: add IIO_TRIGGER dependency to STK8BA50
- LP: #1556269
  * iio: add HAS_IOMEM dependency to VF610_ADC
- LP: #1556269
  * iio: dac: mcp4725: set iio name property in sysfs
- LP: #1556269
  * iommu/vt-d: Fix 64-bit accesses to 32-bit DMAR_GSTS_REG
- LP: #1556269
  * iio: light: acpi-als: Report data as processed
- LP: #1556269
  * iio:adc:ti_am335x_adc Fix buffered mode by identifying as software
buffer.
- LP: #1556269
  * ASoC: rt5645: fix the shift bit of IN1 boost
- LP: #1556269
  * ARCv2: STAR 9000950267: Handle return from intr to Delay Slot #2
- LP: #1556269
  * cgroup: make sure a parent css isn't offlined before its children
- LP: #1556269
  * ARM: OMAP2+: Fix wait_dll_lock_timed for rodata
- LP: #1556269
  * ARM: OMAP2+: Fix l2dis_3630 for rodata
- LP: #1556269
  * ARM: OMAP2+: Fix save_secure_ram_context for rodata
- LP: #1556269
  * ARM: OMAP2+: Fix l2_inv_api_params for rodata
- LP: #1556269
  * ARM: OMAP2+: Fix ppa_zero_params and ppa_por_params for rodata
- LP: #1556269
  * rtlwifi: rtl8821ae: Fix 5G failure when EEPROM is incorrectly encoded
- LP: #1556269
  * PCI/AER: Flush workqueue on device remove to avoid use-after-free
- LP: #1556269
  * ARM: dts: Fix wl12xx missing clocks that cause hangs
- LP: #1556269
  * libata: disable forced PORTS_IMPL for >= AHCI 1.3
- LP: #1556269
  * mac80211: Requeue work after scan complete for all VIF types.
- LP: #1556269
  * rfkill: fix rfkill_fop_read wait_event usage
- LP: #1556269
  * ARM: dts: at91: sama5d4: fix instance id of DBGU
- LP: #1556269
  * ARM: dts: at91: sama5d4ek: add phy address and IRQ for macb0
- LP: #1556269
  * ARM: dts: at91: sama5d4 xplained: fix phy0 IRQ type
- LP: #1556269
  * crypto: shash - Fix has_key setting
- LP: #1556269
  * Input: vmmouse - fix absolute device registration
- LP: #1556269
  * spi: atmel: fix gpio chip-select in case of non-DT platform
- LP: #1556269
  * drm/i915/dp: fall back to 18 bpp when sink capability is unknown
- LP: #1556269
  * ALSA: usb-audio: Fix OPPO HA-1 vendor ID
- LP: #1556269
  * ALSA: usb-audio: Add native DSD support for PS Audio NuWave DAC
- LP: #1556269
  * ALSA: usb-audio: Add quirk for Microsoft LifeCam HD-6000
- LP: #1556269
  * target: Fix WRITE_SAME/DISCARD conversion to linux 512b sectors
- LP: #1556269
  * crypto: algif_hash - wait for crypto_ahash_init() to complete
- LP: #1556269
  * iio: inkern: fix a NULL dereference on error
- LP: #1556269
  * iio: pressure: mpl115: fix temperature offset sign
- LP: #1556269
  * intel_scu_ipcutil: underflow in scu_reg_access()
- LP: #1556269
  * ALSA: seq: Fix race at closing in virmidi driver
- LP: #1556269
  * ALSA: rawmidi: Remove kernel WARNING for NULL user-space buffer check
- LP: #1556269
  * ALSA: pcm: Fix potential deadlock in OSS emulation
- LP: #1556269
  * ALSA: seq: Fix yet another races among ALSA timer accesses
- LP: #1556269
  * ALSA: timer: Code cleanup
- LP: #1556269
  * ALSA: timer: Fix link corruption due to double start or stop
- LP: #1556269
  * libata: fix sff host state machine locking while polling
- LP: #1556269
  * MIPS: Fix buffer overflow in syscall_get_arguments()
- LP: #1556269
  * cputime: Prevent 32bit overflow in time[val|spec]_to_cputime()
- LP: #1556269
  * drm: add helper to check for wc memory support
- LP: #1556269
  * drm/radeon: mask out WC from BO on unsupported arches
- LP: #1556269
  * drm/amdgpu: mask out WC from BO on unsupported arches
- LP: #1556269
  * ASoC: dpcm: fix the BE state on hw_free
- LP: #1556269
  * drm/amdgpu: move gmc7 support out of CIK dependency
- LP: #1556269
  * drm/amdgpu: iceland use CI based 

[Kernel-packages] [Bug 1496927] Re: [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

[Chris Valean]

We've tested the proposed kernel  4.2.0.35.38 and the issue is no longer
present, basic functionality has also been tested.

Thank you!

** Tags removed: verification-needed-wily
** Tags added: verification-done-wily

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https://bugs.launchpad.net/bugs/1496927

Title:
  [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Wily:
  Fix Committed
Status in linux source package in Xenial:
  Fix Released

Bug description:
  While testing Ubuntu 15.10 Wily Werewolf (development branch) 64 bit
  we found the below issue.

  Repro rate: 100%
  Repro details:
  Hyper-V: Server 2012 (no R2) - WS 2012 is the only affected platform
  Daily build version: 2015.09.10
  Kernel: kernel 4.2.0-7-generic

  During the below event, we also noticed that system-udevd is
  constantly around 100% CPU on the VM, taking a lot of cycles.

  On Server 2012 we don't have the Live backup with VSS feature, so
  these messages should not occur in the first place.

  After 20 minutes we have over 3000 messages in the logs, all like below:
  Sep 14 17:43:33 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:01 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1496927] Re: [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

[Kamal Mostafa]

This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
wily' to 'verification-done-wily'.

If verification is not done by 5 working days from today, this fix will
be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how
to enable and use -proposed. Thank you!


** Tags added: verification-needed-wily

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1496927

Title:
  [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Wily:
  Fix Committed
Status in linux source package in Xenial:
  Fix Released

Bug description:
  While testing Ubuntu 15.10 Wily Werewolf (development branch) 64 bit
  we found the below issue.

  Repro rate: 100%
  Repro details:
  Hyper-V: Server 2012 (no R2) - WS 2012 is the only affected platform
  Daily build version: 2015.09.10
  Kernel: kernel 4.2.0-7-generic

  During the below event, we also noticed that system-udevd is
  constantly around 100% CPU on the VM, taking a lot of cycles.

  On Server 2012 we don't have the Live backup with VSS feature, so
  these messages should not occur in the first place.

  After 20 minutes we have over 3000 messages in the logs, all like below:
  Sep 14 17:43:33 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:01 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1496927/+subscriptions

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[Kernel-packages] [Bug 1496927] Re: [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

[Launchpad Bug Tracker]

** Branch linked: lp:ubuntu/trusty-proposed/linux-lts-wily

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1496927

Title:
  [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Wily:
  Fix Committed
Status in linux source package in Xenial:
  Fix Released

Bug description:
  While testing Ubuntu 15.10 Wily Werewolf (development branch) 64 bit
  we found the below issue.

  Repro rate: 100%
  Repro details:
  Hyper-V: Server 2012 (no R2) - WS 2012 is the only affected platform
  Daily build version: 2015.09.10
  Kernel: kernel 4.2.0-7-generic

  During the below event, we also noticed that system-udevd is
  constantly around 100% CPU on the VM, taking a lot of cycles.

  On Server 2012 we don't have the Live backup with VSS feature, so
  these messages should not occur in the first place.

  After 20 minutes we have over 3000 messages in the logs, all like below:
  Sep 14 17:43:33 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:01 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1496927/+subscriptions

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[Kernel-packages] [Bug 1496927] Re: [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

[Brad Figg]

** Changed in: linux (Ubuntu Wily)
   Status: In Progress => Fix Committed

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1496927

Title:
  [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Wily:
  Fix Committed
Status in linux source package in Xenial:
  Fix Released

Bug description:
  While testing Ubuntu 15.10 Wily Werewolf (development branch) 64 bit
  we found the below issue.

  Repro rate: 100%
  Repro details:
  Hyper-V: Server 2012 (no R2) - WS 2012 is the only affected platform
  Daily build version: 2015.09.10
  Kernel: kernel 4.2.0-7-generic

  During the below event, we also noticed that system-udevd is
  constantly around 100% CPU on the VM, taking a lot of cycles.

  On Server 2012 we don't have the Live backup with VSS feature, so
  these messages should not occur in the first place.

  After 20 minutes we have over 3000 messages in the logs, all like below:
  Sep 14 17:43:33 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:01 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1496927/+subscriptions

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[Kernel-packages] [Bug 1496927] Re: [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

[Joseph Salisbury]

I submitted an SRU request for this fix to be included in Wily.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1496927

Title:
  [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  Fix Released

Bug description:
  While testing Ubuntu 15.10 Wily Werewolf (development branch) 64 bit
  we found the below issue.

  Repro rate: 100%
  Repro details:
  Hyper-V: Server 2012 (no R2) - WS 2012 is the only affected platform
  Daily build version: 2015.09.10
  Kernel: kernel 4.2.0-7-generic

  During the below event, we also noticed that system-udevd is
  constantly around 100% CPU on the VM, taking a lot of cycles.

  On Server 2012 we don't have the Live backup with VSS feature, so
  these messages should not occur in the first place.

  After 20 minutes we have over 3000 messages in the logs, all like below:
  Sep 14 17:43:33 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:01 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1496927/+subscriptions

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[Kernel-packages] [Bug 1496927] Re: [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

[Joseph Salisbury]

Thanks for testing, Adrian.  I'll submit an SRU request to have commit
ed9ba608e included in Wily.

** Changed in: linux (Ubuntu Xenial)
   Status: In Progress => Fix Released

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1496927

Title:
  [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  Fix Released

Bug description:
  While testing Ubuntu 15.10 Wily Werewolf (development branch) 64 bit
  we found the below issue.

  Repro rate: 100%
  Repro details:
  Hyper-V: Server 2012 (no R2) - WS 2012 is the only affected platform
  Daily build version: 2015.09.10
  Kernel: kernel 4.2.0-7-generic

  During the below event, we also noticed that system-udevd is
  constantly around 100% CPU on the VM, taking a lot of cycles.

  On Server 2012 we don't have the Live backup with VSS feature, so
  these messages should not occur in the first place.

  After 20 minutes we have over 3000 messages in the logs, all like below:
  Sep 14 17:43:33 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:01 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory

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[Kernel-packages] [Bug 1496927] Re: [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

[Adrian Suhov]

Hi!
I tested Wily with the test kernel from 
http://kernel.ubuntu.com/~jsalisbury/lp1496927/ and it fixes the bug. I also 
tested Xenial with 4.4.0-11-generic kernel and the issue is fixed there too.

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Title:
  [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress

Bug description:
  While testing Ubuntu 15.10 Wily Werewolf (development branch) 64 bit
  we found the below issue.

  Repro rate: 100%
  Repro details:
  Hyper-V: Server 2012 (no R2) - WS 2012 is the only affected platform
  Daily build version: 2015.09.10
  Kernel: kernel 4.2.0-7-generic

  During the below event, we also noticed that system-udevd is
  constantly around 100% CPU on the VM, taking a lot of cycles.

  On Server 2012 we don't have the Live backup with VSS feature, so
  these messages should not occur in the first place.

  After 20 minutes we have over 3000 messages in the logs, all like below:
  Sep 14 17:43:33 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:01 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1496927] Re: [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

[Joseph Salisbury]

Commit ed9ba608e is in Xenial as of the Ubuntu-4.4.0-9.24 kernel.  So if
commit ed9ba608e is the real fix, this bug should already be fixed in
Xenial.

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Title:
  [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress

Bug description:
  While testing Ubuntu 15.10 Wily Werewolf (development branch) 64 bit
  we found the below issue.

  Repro rate: 100%
  Repro details:
  Hyper-V: Server 2012 (no R2) - WS 2012 is the only affected platform
  Daily build version: 2015.09.10
  Kernel: kernel 4.2.0-7-generic

  During the below event, we also noticed that system-udevd is
  constantly around 100% CPU on the VM, taking a lot of cycles.

  On Server 2012 we don't have the Live backup with VSS feature, so
  these messages should not occur in the first place.

  After 20 minutes we have over 3000 messages in the logs, all like below:
  Sep 14 17:43:33 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:01 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1496927] Re: [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

[Joseph Salisbury]

I believe the following commit will fix this bug:

commit ed9ba608e4851144af8c7061cbb19f751c73e998
Author: Olaf Hering 
Date:   Mon Dec 14 16:01:42 2015 -0800

Drivers: hv: vss: run only on supported host versions


I built a Wily test kernel with this commit, which can be downloaded from:
http://kernel.ubuntu.com/~jsalisbury/lp1496927/

Can you confirm this test kernel fixes the bug?

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Title:
  [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress

Bug description:
  While testing Ubuntu 15.10 Wily Werewolf (development branch) 64 bit
  we found the below issue.

  Repro rate: 100%
  Repro details:
  Hyper-V: Server 2012 (no R2) - WS 2012 is the only affected platform
  Daily build version: 2015.09.10
  Kernel: kernel 4.2.0-7-generic

  During the below event, we also noticed that system-udevd is
  constantly around 100% CPU on the VM, taking a lot of cycles.

  On Server 2012 we don't have the Live backup with VSS feature, so
  these messages should not occur in the first place.

  After 20 minutes we have over 3000 messages in the logs, all like below:
  Sep 14 17:43:33 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:01 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1496927] Re: [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

[Joseph Salisbury]

Thanks for the update, Chris.  I'll perform a reverse bisect to find the
commit that fixes this issue.

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Title:
  [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress

Bug description:
  While testing Ubuntu 15.10 Wily Werewolf (development branch) 64 bit
  we found the below issue.

  Repro rate: 100%
  Repro details:
  Hyper-V: Server 2012 (no R2) - WS 2012 is the only affected platform
  Daily build version: 2015.09.10
  Kernel: kernel 4.2.0-7-generic

  During the below event, we also noticed that system-udevd is
  constantly around 100% CPU on the VM, taking a lot of cycles.

  On Server 2012 we don't have the Live backup with VSS feature, so
  these messages should not occur in the first place.

  After 20 minutes we have over 3000 messages in the logs, all like below:
  Sep 14 17:43:33 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:01 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1496927] Re: [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

[Chris Valean]

Hi Joe,

I have a 15.04 install running linux-next 4.5.0-rc5 from Febr 26th, on
which I can confirm Sidney's update, that udev/systemd is no longer
slowing this down to a halt.

As the default 3.19 kernel on 15.04 is not having this behavior, I've installed 
kernel 4.2.8 from the ubuntu ppa mainline tree.
Running 4.2.8 on 15.04 brings us to the original problem with systemd-udevd CPU 
cycles.
It would be great if you can do the bisect this as high as kernel 4.4 from 
Xenial, as that one was also showing the same symptoms, so you can narrow down 
the patches between 4.4 (xenial) and 4.5 upstream.
Thank you!

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Title:
  [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress

Bug description:
  While testing Ubuntu 15.10 Wily Werewolf (development branch) 64 bit
  we found the below issue.

  Repro rate: 100%
  Repro details:
  Hyper-V: Server 2012 (no R2) - WS 2012 is the only affected platform
  Daily build version: 2015.09.10
  Kernel: kernel 4.2.0-7-generic

  During the below event, we also noticed that system-udevd is
  constantly around 100% CPU on the VM, taking a lot of cycles.

  On Server 2012 we don't have the Live backup with VSS feature, so
  these messages should not occur in the first place.

  After 20 minutes we have over 3000 messages in the logs, all like below:
  Sep 14 17:43:33 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:01 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1496927] Re: [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

[Joseph Salisbury]

Thanks good news, Sidney.  @Chris, can you confirm this issue is
resolved on 4.5.0-040500rc5?  If it is, I can perform a reverse bisect
to identify the fix, unless an obvious fix sticks out in the git logs.

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Title:
  [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress

Bug description:
  While testing Ubuntu 15.10 Wily Werewolf (development branch) 64 bit
  we found the below issue.

  Repro rate: 100%
  Repro details:
  Hyper-V: Server 2012 (no R2) - WS 2012 is the only affected platform
  Daily build version: 2015.09.10
  Kernel: kernel 4.2.0-7-generic

  During the below event, we also noticed that system-udevd is
  constantly around 100% CPU on the VM, taking a lot of cycles.

  On Server 2012 we don't have the Live backup with VSS feature, so
  these messages should not occur in the first place.

  After 20 minutes we have over 3000 messages in the logs, all like below:
  Sep 14 17:43:33 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:01 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1496927] Re: [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

[Sidney McGeer]

Not sure if helpful but I just tried this on 4.5.0-040500rc5 and the
problem is gone.

system-udevd is running at less than 1% of CPU

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Title:
  [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress

Bug description:
  While testing Ubuntu 15.10 Wily Werewolf (development branch) 64 bit
  we found the below issue.

  Repro rate: 100%
  Repro details:
  Hyper-V: Server 2012 (no R2) - WS 2012 is the only affected platform
  Daily build version: 2015.09.10
  Kernel: kernel 4.2.0-7-generic

  During the below event, we also noticed that system-udevd is
  constantly around 100% CPU on the VM, taking a lot of cycles.

  On Server 2012 we don't have the Live backup with VSS feature, so
  these messages should not occur in the first place.

  After 20 minutes we have over 3000 messages in the logs, all like below:
  Sep 14 17:43:33 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:01 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1496927] Re: [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

[Joshua R. Poulson]

Joe, be aware that the vss daemon for Hyper-V only supports host
versions 5.0 and greater. As a result, it won't actually *do* anything
on Windows Server 2012. I'm not sure what the underlying issue is, but
is it spinning in an attempt to start the daemon? This really slows down
our VMs and we do a lot of testing so it would be really good to figure
out what changed to cause this behavior.

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Title:
  [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress

Bug description:
  While testing Ubuntu 15.10 Wily Werewolf (development branch) 64 bit
  we found the below issue.

  Repro rate: 100%
  Repro details:
  Hyper-V: Server 2012 (no R2) - WS 2012 is the only affected platform
  Daily build version: 2015.09.10
  Kernel: kernel 4.2.0-7-generic

  During the below event, we also noticed that system-udevd is
  constantly around 100% CPU on the VM, taking a lot of cycles.

  On Server 2012 we don't have the Live backup with VSS feature, so
  these messages should not occur in the first place.

  After 20 minutes we have over 3000 messages in the logs, all like below:
  Sep 14 17:43:33 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:01 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1496927] Re: [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

[Ovidiu Rusu]

I've tried to boot an Ubuntu 16.04 daily build from 09-Feb on a Windows
Server 2012 but it takes around 6-7 minutes. If I try to reboot it after
boot the VM hangs. Also system-udevd consumes a lot of CPU.

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Title:
  [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress

Bug description:
  While testing Ubuntu 15.10 Wily Werewolf (development branch) 64 bit
  we found the below issue.

  Repro rate: 100%
  Repro details:
  Hyper-V: Server 2012 (no R2) - WS 2012 is the only affected platform
  Daily build version: 2015.09.10
  Kernel: kernel 4.2.0-7-generic

  During the below event, we also noticed that system-udevd is
  constantly around 100% CPU on the VM, taking a lot of cycles.

  On Server 2012 we don't have the Live backup with VSS feature, so
  these messages should not occur in the first place.

  After 20 minutes we have over 3000 messages in the logs, all like below:
  Sep 14 17:43:33 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:01 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1496927] Re: [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

[Chris Valean]

We're seeing this also on the proposed 4.3 rebased kernel (from bug ID 1519917) 
on top of 15.10.
So this appeared the first time in 4.2 and then into 4.3.

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Title:
  [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress

Bug description:
  While testing Ubuntu 15.10 Wily Werewolf (development branch) 64 bit
  we found the below issue.

  Repro rate: 100%
  Repro details:
  Hyper-V: Server 2012 (no R2) - WS 2012 is the only affected platform
  Daily build version: 2015.09.10
  Kernel: kernel 4.2.0-7-generic

  During the below event, we also noticed that system-udevd is
  constantly around 100% CPU on the VM, taking a lot of cycles.

  On Server 2012 we don't have the Live backup with VSS feature, so
  these messages should not occur in the first place.

  After 20 minutes we have over 3000 messages in the logs, all like below:
  Sep 14 17:43:33 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:01 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1496927] Re: [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

[Henrik]

Any progress on this Joseph?

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https://bugs.launchpad.net/bugs/1496927

Title:
  [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress

Bug description:
  While testing Ubuntu 15.10 Wily Werewolf (development branch) 64 bit
  we found the below issue.

  Repro rate: 100%
  Repro details:
  Hyper-V: Server 2012 (no R2) - WS 2012 is the only affected platform
  Daily build version: 2015.09.10
  Kernel: kernel 4.2.0-7-generic

  During the below event, we also noticed that system-udevd is
  constantly around 100% CPU on the VM, taking a lot of cycles.

  On Server 2012 we don't have the Live backup with VSS feature, so
  these messages should not occur in the first place.

  After 20 minutes we have over 3000 messages in the logs, all like below:
  Sep 14 17:43:33 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:01 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory

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[Kernel-packages] [Bug 1496927] Re: [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

[Serge]

Hi guys,

there is the same bug in Ubuntu 15.04 with default kernel 4.2.0.19 as well when 
using it as vm upon MS Windows Server 2012 (with no R2) with Hyper -V role. 
I've downgraded the kernel to the one of version 3.19.0-39 and a high cpu load 
has disappeared at all.
Currently a don't see a systemd-udev in the first rank when starting atop.

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Title:
  [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress

Bug description:
  While testing Ubuntu 15.10 Wily Werewolf (development branch) 64 bit
  we found the below issue.

  Repro rate: 100%
  Repro details:
  Hyper-V: Server 2012 (no R2) - WS 2012 is the only affected platform
  Daily build version: 2015.09.10
  Kernel: kernel 4.2.0-7-generic

  During the below event, we also noticed that system-udevd is
  constantly around 100% CPU on the VM, taking a lot of cycles.

  On Server 2012 we don't have the Live backup with VSS feature, so
  these messages should not occur in the first place.

  After 20 minutes we have over 3000 messages in the logs, all like below:
  Sep 14 17:43:33 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:01 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory

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[Kernel-packages] [Bug 1496927] Re: [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

[Serge]

I've also spotted the fact that when launching /rebooting а vm with the
kernel 4.2.x  it takes too long (about 2 minutes) to put up an eth0.
There is no such an issue with the kernel 3.19.x in Ubuntu 15.04/15.10

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Title:
  [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress

Bug description:
  While testing Ubuntu 15.10 Wily Werewolf (development branch) 64 bit
  we found the below issue.

  Repro rate: 100%
  Repro details:
  Hyper-V: Server 2012 (no R2) - WS 2012 is the only affected platform
  Daily build version: 2015.09.10
  Kernel: kernel 4.2.0-7-generic

  During the below event, we also noticed that system-udevd is
  constantly around 100% CPU on the VM, taking a lot of cycles.

  On Server 2012 we don't have the Live backup with VSS feature, so
  these messages should not occur in the first place.

  After 20 minutes we have over 3000 messages in the logs, all like below:
  Sep 14 17:43:33 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:01 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory

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[Kernel-packages] [Bug 1496927] Re: [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

[Serge]

Finnaly after some efforts  i've manged to make working linux-tools and
linux-cloud-tools in Ubuntu 15.10 with the kernel 3.19.0-39-generic.

As the above tools for the kernel 3.19.0-39 are available  in Vivid
distro only (i fogot to mention I had upgraded 15.04 into 15.10) so I
had to download them manually as files and then install in vm.

Here are the names of the pakages:

linux-cloud-tools-3.19.0-39-generic_3.19.0-39.44_amd64.deb
linux-cloud-tools-3.19.0-39_3.19.0-39.44_amd64.deb
linux-lts-vivid-cloud-tools-3.19.0-39_3.19.0-39.44~14.04.1_amd64.deb
linux-tools-3.19.0-39-generic_3.19.0-39.44~14.04.1_amd64.deb
linux-lts-vivid-tools-3.19.0-39_3.19.0-39.44~14.04.1_amd64.deb

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Title:
  [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress

Bug description:
  While testing Ubuntu 15.10 Wily Werewolf (development branch) 64 bit
  we found the below issue.

  Repro rate: 100%
  Repro details:
  Hyper-V: Server 2012 (no R2) - WS 2012 is the only affected platform
  Daily build version: 2015.09.10
  Kernel: kernel 4.2.0-7-generic

  During the below event, we also noticed that system-udevd is
  constantly around 100% CPU on the VM, taking a lot of cycles.

  On Server 2012 we don't have the Live backup with VSS feature, so
  these messages should not occur in the first place.

  After 20 minutes we have over 3000 messages in the logs, all like below:
  Sep 14 17:43:33 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:01 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory

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[Kernel-packages] [Bug 1496927] Re: [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

[Chris Valean]

Joe, do you have any updates on this?
Thank you!

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Title:
  [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress

Bug description:
  While testing Ubuntu 15.10 Wily Werewolf (development branch) 64 bit
  we found the below issue.

  Repro rate: 100%
  Repro details:
  Hyper-V: Server 2012 (no R2) - WS 2012 is the only affected platform
  Daily build version: 2015.09.10
  Kernel: kernel 4.2.0-7-generic

  During the below event, we also noticed that system-udevd is
  constantly around 100% CPU on the VM, taking a lot of cycles.

  On Server 2012 we don't have the Live backup with VSS feature, so
  these messages should not occur in the first place.

  After 20 minutes we have over 3000 messages in the logs, all like below:
  Sep 14 17:43:33 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:01 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1496927] Re: [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

[Joseph Salisbury]

I moved my test system back over to Windows Server 2012  R2  to do some
testing for bug 1470250.  I'll switch back to without the R2 updates and
continue the bisect on this bug.

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Title:
  [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress

Bug description:
  While testing Ubuntu 15.10 Wily Werewolf (development branch) 64 bit
  we found the below issue.

  Repro rate: 100%
  Repro details:
  Hyper-V: Server 2012 (no R2) - WS 2012 is the only affected platform
  Daily build version: 2015.09.10
  Kernel: kernel 4.2.0-7-generic

  During the below event, we also noticed that system-udevd is
  constantly around 100% CPU on the VM, taking a lot of cycles.

  On Server 2012 we don't have the Live backup with VSS feature, so
  these messages should not occur in the first place.

  After 20 minutes we have over 3000 messages in the logs, all like below:
  Sep 14 17:43:33 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:01 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1496927] Re: [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

[Joseph Salisbury]

I'm not able to reproduce the bug.  I should be able to perform a bisect
now and identify the commit that caused this.

** Changed in: linux (Ubuntu)
   Status: Confirmed => In Progress

** Changed in: linux (Ubuntu Wily)
   Status: Confirmed => In Progress

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Title:
  [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Wily:
  In Progress

Bug description:
  While testing Ubuntu 15.10 Wily Werewolf (development branch) 64 bit
  we found the below issue.

  Repro rate: 100%
  Repro details:
  Hyper-V: Server 2012 (no R2) - WS 2012 is the only affected platform
  Daily build version: 2015.09.10
  Kernel: kernel 4.2.0-7-generic

  During the below event, we also noticed that system-udevd is
  constantly around 100% CPU on the VM, taking a lot of cycles.

  On Server 2012 we don't have the Live backup with VSS feature, so
  these messages should not occur in the first place.

  After 20 minutes we have over 3000 messages in the logs, all like below:
  Sep 14 17:43:33 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:01 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1496927] Re: [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

[Joseph Salisbury]

Yes, this is defiantly a regression.  I booted the wily guest with the
mainline kernel(v4.2-rc2) and the bug still exists.  I then booted with
the Vivid kernels(3.19 based) and the bug went away.  I'll bisect this
down and should have an update shortly.

** Also affects: linux (Ubuntu Xenial)
   Importance: High
 Assignee: Joseph Salisbury (jsalisbury)
   Status: In Progress

** Tags added: xenial

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Title:
  [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress

Bug description:
  While testing Ubuntu 15.10 Wily Werewolf (development branch) 64 bit
  we found the below issue.

  Repro rate: 100%
  Repro details:
  Hyper-V: Server 2012 (no R2) - WS 2012 is the only affected platform
  Daily build version: 2015.09.10
  Kernel: kernel 4.2.0-7-generic

  During the below event, we also noticed that system-udevd is
  constantly around 100% CPU on the VM, taking a lot of cycles.

  On Server 2012 we don't have the Live backup with VSS feature, so
  these messages should not occur in the first place.

  After 20 minutes we have over 3000 messages in the logs, all like below:
  Sep 14 17:43:33 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:01 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1496927] Re: [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

[Chris Valean]

Hi Joe,
On 2012 and prior you have only Gen1.
Please use Windows Server 2012 (*without* R2) with a Wily VM for the direct 
repro.
Given Jirayut replies, it seems that this goes down to the Wily kernel, so with 
Wily on WS2012 you'll have the direct repro.

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Title:
  [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

Status in linux package in Ubuntu:
  Confirmed
Status in linux source package in Wily:
  Confirmed

Bug description:
  While testing Ubuntu 15.10 Wily Werewolf (development branch) 64 bit
  we found the below issue.

  Repro rate: 100%
  Repro details:
  Hyper-V: Server 2012 (no R2) - WS 2012 is the only affected platform
  Daily build version: 2015.09.10
  Kernel: kernel 4.2.0-7-generic

  During the below event, we also noticed that system-udevd is
  constantly around 100% CPU on the VM, taking a lot of cycles.

  On Server 2012 we don't have the Live backup with VSS feature, so
  these messages should not occur in the first place.

  After 20 minutes we have over 3000 messages in the logs, all like below:
  Sep 14 17:43:33 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:01 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1496927] Re: [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

[Joseph Salisbury]

I confirm that this  can not be reproduce on Windows Server with R2.
I'm creating a second Hyper-V environment without R2.  Does it matter if
this is a Gen1 or Gen2 guest?

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Title:
  [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

Status in linux package in Ubuntu:
  Confirmed
Status in linux source package in Wily:
  Confirmed

Bug description:
  While testing Ubuntu 15.10 Wily Werewolf (development branch) 64 bit
  we found the below issue.

  Repro rate: 100%
  Repro details:
  Hyper-V: Server 2012 (no R2) - WS 2012 is the only affected platform
  Daily build version: 2015.09.10
  Kernel: kernel 4.2.0-7-generic

  During the below event, we also noticed that system-udevd is
  constantly around 100% CPU on the VM, taking a lot of cycles.

  On Server 2012 we don't have the Live backup with VSS feature, so
  these messages should not occur in the first place.

  After 20 minutes we have over 3000 messages in the logs, all like below:
  Sep 14 17:43:33 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:01 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1496927] Re: [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

[Joseph Salisbury]

Are there specific steps to reproduce this issue, or does it just
require running HypverV with a Wily kernel?

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Title:
  [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

Status in linux package in Ubuntu:
  Confirmed
Status in linux source package in Wily:
  Confirmed

Bug description:
  While testing Ubuntu 15.10 Wily Werewolf (development branch) 64 bit
  we found the below issue.

  Repro rate: 100%
  Repro details:
  Hyper-V: Server 2012 (no R2) - WS 2012 is the only affected platform
  Daily build version: 2015.09.10
  Kernel: kernel 4.2.0-7-generic

  During the below event, we also noticed that system-udevd is
  constantly around 100% CPU on the VM, taking a lot of cycles.

  On Server 2012 we don't have the Live backup with VSS feature, so
  these messages should not occur in the first place.

  After 20 minutes we have over 3000 messages in the logs, all like below:
  Sep 14 17:43:33 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:01 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1496927] Re: [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

[Jirayut Nimsaeng]

Yes. Just install Wily kernel on HyperV with Windows Server 2008 R2 or
Windows Server 2012 (No R2)

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Title:
  [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

Status in linux package in Ubuntu:
  Confirmed
Status in linux source package in Wily:
  Confirmed

Bug description:
  While testing Ubuntu 15.10 Wily Werewolf (development branch) 64 bit
  we found the below issue.

  Repro rate: 100%
  Repro details:
  Hyper-V: Server 2012 (no R2) - WS 2012 is the only affected platform
  Daily build version: 2015.09.10
  Kernel: kernel 4.2.0-7-generic

  During the below event, we also noticed that system-udevd is
  constantly around 100% CPU on the VM, taking a lot of cycles.

  On Server 2012 we don't have the Live backup with VSS feature, so
  these messages should not occur in the first place.

  After 20 minutes we have over 3000 messages in the logs, all like below:
  Sep 14 17:43:33 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:01 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory

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[Kernel-packages] [Bug 1496927] Re: [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

[Chris Valean]

Joe, do you have any update on this issue, or raise the priority of it?
Thank you!

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Title:
  [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

Status in linux package in Ubuntu:
  Confirmed
Status in linux source package in Wily:
  Confirmed

Bug description:
  While testing Ubuntu 15.10 Wily Werewolf (development branch) 64 bit
  we found the below issue.

  Repro rate: 100%
  Repro details:
  Hyper-V: Server 2012 (no R2) - WS 2012 is the only affected platform
  Daily build version: 2015.09.10
  Kernel: kernel 4.2.0-7-generic

  During the below event, we also noticed that system-udevd is
  constantly around 100% CPU on the VM, taking a lot of cycles.

  On Server 2012 we don't have the Live backup with VSS feature, so
  these messages should not occur in the first place.

  After 20 minutes we have over 3000 messages in the logs, all like below:
  Sep 14 17:43:33 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:01 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory

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[Kernel-packages] [Bug 1496927] Re: [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

[Jirayut Nimsaeng]

Confirm that this bug happen to me too. I'm using Ubuntu 14.04.3 LTS and
install new Kernel with command

sudo apt-get install -y linux-generic-lts-wily linux-tools-virtual-lts-
wily linux-cloud-tools-virtual-lts-wily hv-kvp-daemon-init

Then reboot to get new Kernel 4.2.0-18-generic then systemd-udevd got
high cpu usage instantly. If I run the command "udevadm monitor" it will
show a lot of these repeat all the time.

UDEV  [20358.123891] add  
/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/device:07/VMBUS:01/vmbus_6722212 
(vmbus)
KERNEL[20358.123989] remove   
/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/device:07/VMBUS:01/vmbus_6722212 
(vmbus)
UDEV  [20358.124105] remove   /devices/virtual/misc/vmbus!hv_vss (misc)
KERNEL[20358.124336] add  
/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/device:07/VMBUS:01/vmbus_6722213 
(vmbus)
UDEV  [20358.124356] remove   
/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/device:07/VMBUS:01/vmbus_6722212 
(vmbus)
KERNEL[20358.124403] add  /devices/virtual/misc/vmbus!hv_vss (misc)
UDEV  [20358.124753] add  
/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/device:07/VMBUS:01/vmbus_6722213 
(vmbus)
UDEV  [20358.124853] add  /devices/virtual/misc/vmbus!hv_vss (misc)

So I remove all wily kernel and back to vivid kernel then everything
back to normal

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Title:
  [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

Status in linux package in Ubuntu:
  Confirmed
Status in linux source package in Wily:
  Confirmed

Bug description:
  While testing Ubuntu 15.10 Wily Werewolf (development branch) 64 bit
  we found the below issue.

  Repro rate: 100%
  Repro details:
  Hyper-V: Server 2012 (no R2) - WS 2012 is the only affected platform
  Daily build version: 2015.09.10
  Kernel: kernel 4.2.0-7-generic

  During the below event, we also noticed that system-udevd is
  constantly around 100% CPU on the VM, taking a lot of cycles.

  On Server 2012 we don't have the Live backup with VSS feature, so
  these messages should not occur in the first place.

  After 20 minutes we have over 3000 messages in the logs, all like below:
  Sep 14 17:43:33 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:01 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory

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[Kernel-packages] [Bug 1496927] Re: [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

[Jirayut Nimsaeng]

I forgot to tell that my system using HyperV on Windows Server 2008 R2

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Title:
  [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

Status in linux package in Ubuntu:
  Confirmed
Status in linux source package in Wily:
  Confirmed

Bug description:
  While testing Ubuntu 15.10 Wily Werewolf (development branch) 64 bit
  we found the below issue.

  Repro rate: 100%
  Repro details:
  Hyper-V: Server 2012 (no R2) - WS 2012 is the only affected platform
  Daily build version: 2015.09.10
  Kernel: kernel 4.2.0-7-generic

  During the below event, we also noticed that system-udevd is
  constantly around 100% CPU on the VM, taking a lot of cycles.

  On Server 2012 we don't have the Live backup with VSS feature, so
  these messages should not occur in the first place.

  After 20 minutes we have over 3000 messages in the logs, all like below:
  Sep 14 17:43:33 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:01 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1496927] Re: [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

[Joseph Salisbury]

** Changed in: linux (Ubuntu Wily)
 Assignee: (unassigned) => Joseph Salisbury (jsalisbury)

** Changed in: linux (Ubuntu)
 Assignee: (unassigned) => Joseph Salisbury (jsalisbury)

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Title:
  [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

Status in linux package in Ubuntu:
  Confirmed
Status in linux source package in Wily:
  Confirmed

Bug description:
  While testing Ubuntu 15.10 Wily Werewolf (development branch) 64 bit
  we found the below issue.

  Repro rate: 100%
  Repro details:
  Hyper-V: Server 2012 (no R2) - WS 2012 is the only affected platform
  Daily build version: 2015.09.10
  Kernel: kernel 4.2.0-7-generic

  During the below event, we also noticed that system-udevd is
  constantly around 100% CPU on the VM, taking a lot of cycles.

  On Server 2012 we don't have the Live backup with VSS feature, so
  these messages should not occur in the first place.

  After 20 minutes we have over 3000 messages in the logs, all like below:
  Sep 14 17:43:33 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:01 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1496927] Re: [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

[Chris Valean]

Joe, adding to what my colleague Ovidiu said, the behavior remains and
can be seen in the Oct 12nd build - kernel 4.2.0-16 when running on WS
2012 (without R2).

The systemd-udevd still takes an unusual high number of CPU power, with
the system being idle.

In some other circumstances, the boot time can go as up to 3-5 minutes
without a clear output on what is causing the delay.

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Title:
  [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

Status in linux package in Ubuntu:
  Confirmed
Status in linux source package in Wily:
  Confirmed

Bug description:
  While testing Ubuntu 15.10 Wily Werewolf (development branch) 64 bit
  we found the below issue.

  Repro rate: 100%
  Repro details:
  Hyper-V: Server 2012 (no R2) - WS 2012 is the only affected platform
  Daily build version: 2015.09.10
  Kernel: kernel 4.2.0-7-generic

  During the below event, we also noticed that system-udevd is
  constantly around 100% CPU on the VM, taking a lot of cycles.

  On Server 2012 we don't have the Live backup with VSS feature, so
  these messages should not occur in the first place.

  After 20 minutes we have over 3000 messages in the logs, all like below:
  Sep 14 17:43:33 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:01 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1496927] Re: [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

[Ovidiu Rusu]

Details:
Hyper-V: Server 2012 (no R2)
Kernel: 4.2.0-12-generic
Daily build version: 01-Oct-2015

Same problem occurs to me on the latest iso. I've tried to disable
apparmor but nothing changed. The second ideea was to disable hv-vss-
daemon and it seems that there is a little improvement, meaning that
less messages of error are shown, but the systemd-udev process is still
consuming a lot of CPU.

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Title:
  [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

Status in linux package in Ubuntu:
  Confirmed
Status in linux source package in Wily:
  Confirmed

Bug description:
  While testing Ubuntu 15.10 Wily Werewolf (development branch) 64 bit
  we found the below issue.

  Repro rate: 100%
  Repro details:
  Hyper-V: Server 2012 (no R2) - WS 2012 is the only affected platform
  Daily build version: 2015.09.10
  Kernel: kernel 4.2.0-7-generic

  During the below event, we also noticed that system-udevd is
  constantly around 100% CPU on the VM, taking a lot of cycles.

  On Server 2012 we don't have the Live backup with VSS feature, so
  these messages should not occur in the first place.

  After 20 minutes we have over 3000 messages in the logs, all like below:
  Sep 14 17:43:33 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:01 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1496927] Re: [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

[Chris Valean]

** Changed in: linux (Ubuntu)
   Status: Incomplete => Confirmed

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Title:
  [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  While testing Ubuntu 15.10 Wily Werewolf (development branch) 64 bit
  we found the below issue.

  Repro rate: 100%
  Repro details:
  Hyper-V: Server 2012 (no R2) - WS 2012 is the only affected platform
  Daily build version: 2015.09.10
  Kernel: kernel 4.2.0-7-generic

  During the below event, we also noticed that system-udevd is
  constantly around 100% CPU on the VM, taking a lot of cycles.

  On Server 2012 we don't have the Live backup with VSS feature, so
  these messages should not occur in the first place.

  After 20 minutes we have over 3000 messages in the logs, all like below:
  Sep 14 17:43:33 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:01 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1496927] Re: [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

[Chris Valean]

We're seeing this only on Wily and on 2012.

This is not showing up with other Ubuntu releases and also neither on
the other supported Windows Server releases.

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Title:
  [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

Status in linux package in Ubuntu:
  Confirmed
Status in linux source package in Wily:
  Confirmed

Bug description:
  While testing Ubuntu 15.10 Wily Werewolf (development branch) 64 bit
  we found the below issue.

  Repro rate: 100%
  Repro details:
  Hyper-V: Server 2012 (no R2) - WS 2012 is the only affected platform
  Daily build version: 2015.09.10
  Kernel: kernel 4.2.0-7-generic

  During the below event, we also noticed that system-udevd is
  constantly around 100% CPU on the VM, taking a lot of cycles.

  On Server 2012 we don't have the Live backup with VSS feature, so
  these messages should not occur in the first place.

  After 20 minutes we have over 3000 messages in the logs, all like below:
  Sep 14 17:43:33 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:01 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1496927] Re: [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

[Joseph Salisbury]

Is this issue only happening in Wily, or does it also happen in earlier
releases?

** Tags added: kernel-da-key wily

** Changed in: linux (Ubuntu)
   Importance: Undecided => Medium

** Also affects: linux (Ubuntu Wily)
   Importance: Medium
   Status: Confirmed

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Title:
  [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss

Status in linux package in Ubuntu:
  Confirmed
Status in linux source package in Wily:
  Confirmed

Bug description:
  While testing Ubuntu 15.10 Wily Werewolf (development branch) 64 bit
  we found the below issue.

  Repro rate: 100%
  Repro details:
  Hyper-V: Server 2012 (no R2) - WS 2012 is the only affected platform
  Daily build version: 2015.09.10
  Kernel: kernel 4.2.0-7-generic

  During the below event, we also noticed that system-udevd is
  constantly around 100% CPU on the VM, taking a lot of cycles.

  On Server 2012 we don't have the Live backup with VSS feature, so
  these messages should not occur in the first place.

  After 20 minutes we have over 3000 messages in the logs, all like below:
  Sep 14 17:43:33 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory
  Sep 14 17:44:00 ubuntu systemd-udevd[14292]: setting owner of 
/dev/vmbus/hv_vss to uid=0, gid=0 failed: No such file or directory
  Sep 14 17:44:01 ubuntu systemd-udevd[14292]: setting mode of 
/dev/vmbus/hv_vss to 020600 failed: No such file or directory

To manage notifications about this bug go to:
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