from:"Michael Cook"

[Kernel-packages] [Bug 1218959] Re: KVM virbr# no longer forwards multicast traffic by default (U12.04)

2014-05-07 Thread Michael Cook

Thanks for the patch and test instructions.

Should this be tested using U12.04.2 LTS or U12.04.4 LTS as a baseline
and should I apply updates to the installation first?

A few questions:
1)  I don't understand how of the security update superceeding this patch 
affects this problem unless it prevents enabling MC on bridge?  
2) There is reference to an independent kernel update to libvirt has addressed 
this problem and if so, in which kernel.  The comment #3 mentioned a redhat bug 
but the comments of that bug say it's not going to be propagated and looks 
project specific.  Maybe I misread it?
3) I originally applied a udev rule myself, but specific to the single bridged 
interface I'm using to send multicast over.  Your proposed udev patch applies 
this to all virbr* interfaces.  Is this ok/sensible?

Personally, I think for U12.04.2LTS back ports, MC traffic should have
simply been left as-is.  Future releases should have adopted proper
handling of MC traffic and required Querier to be enabled.

Appreciate any insight, thanks.

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https://bugs.launchpad.net/bugs/1218959

Title:
  KVM virbr# no longer forwards multicast traffic by default (U12.04)

Status in “libvirt” package in Ubuntu:
  Fix Released
Status in “linux” package in Ubuntu:
  Fix Released
Status in “libvirt” source package in Precise:
  Fix Committed
Status in “linux” source package in Precise:
  Won't Fix

Bug description:
  A recent kernel update (Apr 2013) has made it's way to U12.04.2 LTS
  (approx June-Aug 2013) and has stopped the (default) behaviour of
  automatically forwarding multicast traffic over virbr#.  Some updates
  the bridge subsystem now, by default, disable multicast traffic
  without IGMP Querier being enabled on that bridge.

  The corresponding Fedora/RHEL bug tracks the progress/updates of this 
specific change in relation to Fedora.  
  https://bugzilla.redhat.com/show_bug.cgi?id=880035

  (I have yet to find a similar bug report in Ubuntu so I have created
  this bug to help the Ubuntu community identify multicast issues that
  may arise since April 2013 in U12.04 LTS and presumably other Ubuntu
  releases as backports are made and break regression testing.)

  Using the latest patches in U12.04.2 LTS this following addition, with some 
modifications, can be made to the udev rules will enable multicast on virbr# 
bridge:
  https://bugzilla.redhat.com/show_bug.cgi?id=880035#c38

  While this is an improvement/correction to KVM bridge networking it
  has broken existing functionality in U12.04.2 LTS and broke regressed
  functionality that once worked.

  IMPACT: multicast is broken over libvirt bridges
  FIX: set a (new, introduced by a new kernel) toggle on the bridges
  TEST CASE: cat /sys/devices/virtual/net/virbr0/bridge/multicast_querier - if 
0, then forwarding multicast will be broken.
  REGRESSION POTENTIAL: should be none. older kernels do not have the toggle, 
and failure to set it will be ignored

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1042612] Re: [Lenovo ThinkPad W520] KVM Guests only use one CPU after host wakes up from sleep

2013-11-14 Thread Michael Cook

Retesting:
I tested suspending the host but this time with the latest updates to U12.04 
applied to the host  guest.

HOST: Linux thinkpad-w520 3.2.0-55-generic #85-Ubuntu SMP Wed Oct 2 12:29:27 
UTC 2013 x86_64 x86_64 x86_64 
GUEST: Linux tpa 3.2.0-41-generic #66-Ubuntu SMP Thu Apr 25 03:27:11 UTC 2013 
x86_64 x86_64 x86_64 

1) I stressed out the guest to see which CPUs were in use.  I used stress 
--cpu 2
2) I noticed the VM Manager's CPU for this guest go solidly to 100% and CPU 5  
6 to roughly constant 98%.
3) On resuming the host, I noticed stress continued to run but the VM Manager 
CPU graph had spikes every ~2-3 seconds.
4) Host Sys-monitor showed CPUs for this guest was roughly constant at 94%.  

But there was two instead of just one being used by the guest... which
is different from my original issue where they all head to just one host
CPU.  I repeated this suspension several times and the CPU guest spiking
did not occur again.  So it looks like an improvement.

BIOS Update:
Next, as requested above, I tried to update my W520 BIOS from 1.06 (2011) to 
1.42 (latest from Lenovo 2013).

I download the ISO from Lenovo and this booted to Starting PC DOS at which 
point it seems to have hung.
So, I quickly looked into trying to extract and apply the BIOS image in Ubuntu. 
 This does not seem very straightforward either. I've found one guide on 
ThinkWiki which has step-by-step process (with plenty of warnings) for the old 
style BIOS image .exe to build a new ISO to boot.  I extracted the 'new' style 
using innoextract but I have not found/or understood what do with these files 
from the ThinkWiki page.  

Any help here on updating W520 with the newer 1.42 bios ISO/.exe?

-- 
You received this bug notification because you are a member of Kernel
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https://bugs.launchpad.net/bugs/1042612

Title:
  [Lenovo ThinkPad W520] KVM Guests only use one CPU after host wakes up
  from sleep

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  ThinkPad W520 running U12.04 with the latest updates applied.
  VT-d enabled in BIOS
  NVIDIA driver disabled (because it simply doesn't boot with VT-d enabled)
  KVM Guests of Windows7, RHEL5.3

  i) Start KVM Guest and you can see all host CPUs timeslicing and guest is 
fast and responsive.
  ii) Shutdown KVM Guest.
  iii) Place Host laptop into sleep mode.
  iv) Wake up host and restart KVM Guest
  v) KVM Guest CPU graph is at 50%, never fluctuates and behaviour is like 
single-core.  All host CPUs are idling except for one at 100%.

  This is quite reproducable.  It is identical in performance and KVM Guest 
behaviour if you disabled VT-d in the BIOS (but have VT enabled).
  --- 
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  AplayDevices:
    List of PLAYBACK Hardware Devices 
   card 0: PCH [HDA Intel PCH], device 0: CONEXANT Analog [CONEXANT Analog]
 Subdevices: 1/1
 Subdevice #0: subdevice #0
  ApportVersion: 2.0.1-0ubuntu12
  Architecture: amd64
  ArecordDevices:
    List of CAPTURE Hardware Devices 
   card 0: PCH [HDA Intel PCH], device 0: CONEXANT Analog [CONEXANT Analog]
 Subdevices: 1/1
 Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USERPID ACCESS COMMAND
   /dev/snd/controlC0:  kvm2293 F pulseaudio
  Card0.Amixer.info:
   Card hw:0 'PCH'/'HDA Intel PCH at 0xf3b2 irq 54'
 Mixer name : 'Conexant CX20590'
 Components : 'HDA:14f1506e,17aa21cf,0010 
HDA:14f12c06,17aa2122,0010'
 Controls  : 20
 Simple ctrls  : 10
  Card29.Amixer.info:
   Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw 
unknown'
 Mixer name : 'ThinkPad EC (unknown)'
 Components : ''
 Controls  : 1
 Simple ctrls  : 1
  Card29.Amixer.values:
   Simple mixer control 'Console',0
 Capabilities: pswitch pswitch-joined penum
 Playback channels: Mono
 Mono: Playback [on]
  DistroRelease: Ubuntu 12.04
  HibernationDevice: RESUME=UUID=ef35a2f8-8839-44d5-ac77-fcc3fd10dfa2
  InstallationMedia: Ubuntu 12.04 LTS Precise Pangolin - Release amd64 
(20120425)
  MachineType: LENOVO 427638U
  Package: linux (not installed)
  ProcEnviron:
   LANGUAGE=en_CA:en
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_CA.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-29-generic 
root=UUID=6ddbc439-93f6-4c59-a307-902d009a430d ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.2.0-29.46-generic 3.2.24
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-29-generic N/A
   linux-backports-modules-3.2.0-29-generic  N/A
   linux-firmware1.79
  StagingDrivers: mei
  Tags:  precise running-unity staging
  Uname: Linux 3.2.0-29-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip libvirtd lpadmin plugdev sambashare sudo
  dmi.bios.date: 03/02/2011

[Kernel-packages] [Bug 1042612] Re: [Lenovo ThinkPad W520] KVM Guests only use one CPU after host wakes up from sleep

2013-11-14 Thread Michael Cook

Further to my last comment, some real-world network testing of the applications 
running on the guests has shown that although the guests resume to use all CPUs 
the overall performance is sub-standard compared to a clean startup of the host 
(no suspend).  
I don't have any firm numbers to share, just hands-on experience with video 
streams becoming very unstable after a resume, even with a VM guest reboot.  A 
fresh reboot of the host fixed this substandard behaviour.

-- 
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/1042612

Title:
  [Lenovo ThinkPad W520] KVM Guests only use one CPU after host wakes up
  from sleep

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  ThinkPad W520 running U12.04 with the latest updates applied.
  VT-d enabled in BIOS
  NVIDIA driver disabled (because it simply doesn't boot with VT-d enabled)
  KVM Guests of Windows7, RHEL5.3

  i) Start KVM Guest and you can see all host CPUs timeslicing and guest is 
fast and responsive.
  ii) Shutdown KVM Guest.
  iii) Place Host laptop into sleep mode.
  iv) Wake up host and restart KVM Guest
  v) KVM Guest CPU graph is at 50%, never fluctuates and behaviour is like 
single-core.  All host CPUs are idling except for one at 100%.

  This is quite reproducable.  It is identical in performance and KVM Guest 
behaviour if you disabled VT-d in the BIOS (but have VT enabled).
  --- 
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  AplayDevices:
    List of PLAYBACK Hardware Devices 
   card 0: PCH [HDA Intel PCH], device 0: CONEXANT Analog [CONEXANT Analog]
 Subdevices: 1/1
 Subdevice #0: subdevice #0
  ApportVersion: 2.0.1-0ubuntu12
  Architecture: amd64
  ArecordDevices:
    List of CAPTURE Hardware Devices 
   card 0: PCH [HDA Intel PCH], device 0: CONEXANT Analog [CONEXANT Analog]
 Subdevices: 1/1
 Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USERPID ACCESS COMMAND
   /dev/snd/controlC0:  kvm2293 F pulseaudio
  Card0.Amixer.info:
   Card hw:0 'PCH'/'HDA Intel PCH at 0xf3b2 irq 54'
 Mixer name : 'Conexant CX20590'
 Components : 'HDA:14f1506e,17aa21cf,0010 
HDA:14f12c06,17aa2122,0010'
 Controls  : 20
 Simple ctrls  : 10
  Card29.Amixer.info:
   Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw 
unknown'
 Mixer name : 'ThinkPad EC (unknown)'
 Components : ''
 Controls  : 1
 Simple ctrls  : 1
  Card29.Amixer.values:
   Simple mixer control 'Console',0
 Capabilities: pswitch pswitch-joined penum
 Playback channels: Mono
 Mono: Playback [on]
  DistroRelease: Ubuntu 12.04
  HibernationDevice: RESUME=UUID=ef35a2f8-8839-44d5-ac77-fcc3fd10dfa2
  InstallationMedia: Ubuntu 12.04 LTS Precise Pangolin - Release amd64 
(20120425)
  MachineType: LENOVO 427638U
  Package: linux (not installed)
  ProcEnviron:
   LANGUAGE=en_CA:en
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_CA.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-29-generic 
root=UUID=6ddbc439-93f6-4c59-a307-902d009a430d ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.2.0-29.46-generic 3.2.24
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-29-generic N/A
   linux-backports-modules-3.2.0-29-generic  N/A
   linux-firmware1.79
  StagingDrivers: mei
  Tags:  precise running-unity staging
  Uname: Linux 3.2.0-29-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip libvirtd lpadmin plugdev sambashare sudo
  dmi.bios.date: 03/02/2011
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 8BET30WW (1.06 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 427638U
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Available
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: 
dmi:bvnLENOVO:bvr8BET30WW(1.06):bd03/02/2011:svnLENOVO:pn427638U:pvrThinkPadW520:rvnLENOVO:rn427638U:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 427638U
  dmi.product.version: ThinkPad W520
  dmi.sys.vendor: LENOVO

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1042612] Re: [Lenovo ThinkPad W520] KVM Guests only use one CPU after host wakes up from sleep

2013-08-20 Thread Michael Cook

Thanks for the suggestion.  I will be able to try this out by end of Nov
2013.

-- 
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/1042612

Title:
  [Lenovo ThinkPad W520] KVM Guests only use one CPU after host wakes up
  from sleep

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  ThinkPad W520 running U12.04 with the latest updates applied.
  VT-d enabled in BIOS
  NVIDIA driver disabled (because it simply doesn't boot with VT-d enabled)
  KVM Guests of Windows7, RHEL5.3

  i) Start KVM Guest and you can see all host CPUs timeslicing and guest is 
fast and responsive.
  ii) Shutdown KVM Guest.
  iii) Place Host laptop into sleep mode.
  iv) Wake up host and restart KVM Guest
  v) KVM Guest CPU graph is at 50%, never fluctuates and behaviour is like 
single-core.  All host CPUs are idling except for one at 100%.

  This is quite reproducable.  It is identical in performance and KVM Guest 
behaviour if you disabled VT-d in the BIOS (but have VT enabled).
  --- 
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  AplayDevices:
    List of PLAYBACK Hardware Devices 
   card 0: PCH [HDA Intel PCH], device 0: CONEXANT Analog [CONEXANT Analog]
 Subdevices: 1/1
 Subdevice #0: subdevice #0
  ApportVersion: 2.0.1-0ubuntu12
  Architecture: amd64
  ArecordDevices:
    List of CAPTURE Hardware Devices 
   card 0: PCH [HDA Intel PCH], device 0: CONEXANT Analog [CONEXANT Analog]
 Subdevices: 1/1
 Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USERPID ACCESS COMMAND
   /dev/snd/controlC0:  kvm2293 F pulseaudio
  Card0.Amixer.info:
   Card hw:0 'PCH'/'HDA Intel PCH at 0xf3b2 irq 54'
 Mixer name : 'Conexant CX20590'
 Components : 'HDA:14f1506e,17aa21cf,0010 
HDA:14f12c06,17aa2122,0010'
 Controls  : 20
 Simple ctrls  : 10
  Card29.Amixer.info:
   Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw 
unknown'
 Mixer name : 'ThinkPad EC (unknown)'
 Components : ''
 Controls  : 1
 Simple ctrls  : 1
  Card29.Amixer.values:
   Simple mixer control 'Console',0
 Capabilities: pswitch pswitch-joined penum
 Playback channels: Mono
 Mono: Playback [on]
  DistroRelease: Ubuntu 12.04
  HibernationDevice: RESUME=UUID=ef35a2f8-8839-44d5-ac77-fcc3fd10dfa2
  InstallationMedia: Ubuntu 12.04 LTS Precise Pangolin - Release amd64 
(20120425)
  MachineType: LENOVO 427638U
  Package: linux (not installed)
  ProcEnviron:
   LANGUAGE=en_CA:en
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_CA.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-29-generic 
root=UUID=6ddbc439-93f6-4c59-a307-902d009a430d ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.2.0-29.46-generic 3.2.24
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-29-generic N/A
   linux-backports-modules-3.2.0-29-generic  N/A
   linux-firmware1.79
  StagingDrivers: mei
  Tags:  precise running-unity staging
  Uname: Linux 3.2.0-29-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip libvirtd lpadmin plugdev sambashare sudo
  dmi.bios.date: 03/02/2011
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 8BET30WW (1.06 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 427638U
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Available
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: 
dmi:bvnLENOVO:bvr8BET30WW(1.06):bd03/02/2011:svnLENOVO:pn427638U:pvrThinkPadW520:rvnLENOVO:rn427638U:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 427638U
  dmi.product.version: ThinkPad W520
  dmi.sys.vendor: LENOVO

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1042612/+subscriptions

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[Kernel-packages] [Bug 1218959] Re: KVM virbr# no longer forwards multicast traffic by default (U12.04)

[Kernel-packages] [Bug 1042612] Re: [Lenovo ThinkPad W520] KVM Guests only use one CPU after host wakes up from sleep

[Kernel-packages] [Bug 1042612] Re: [Lenovo ThinkPad W520] KVM Guests only use one CPU after host wakes up from sleep

[Kernel-packages] [Bug 1042612] Re: [Lenovo ThinkPad W520] KVM Guests only use one CPU after host wakes up from sleep

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