[Kernel-packages] [Bug 1755979] Re: Cpu utilization showing system time for kvm guests (performance) (sysstat)

[Brad Figg]

** Tags added: cscc

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https://bugs.launchpad.net/bugs/1755979

Title:
  Cpu utilization showing system time for kvm guests (performance)
  (sysstat)

Status in The Ubuntu-power-systems project:
  Fix Released
Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Artful:
  Fix Released
Status in linux source package in Bionic:
  Fix Released

Bug description:
  == SRU Justification ==
  All KVM guest cpu utilization is being reported as sys% time in the host.
  It turns out Guest time accounting (CONFIG_VIRT_CPU_ACCOUNTING_GEN) has
  been broken since v4.13 by commit 8b24e69fc47e436.

  Commit 61bd0f66ff92 fixes this bug and is included in mainline as of 
v4.16-rc5.
  The commit was cc'd to upstream stable, but has not yet landed in upstream 
4.15.

  == Fix ==
  61bd0f66ff92 ("KVM: PPC: Book3S HV: Fix guest time accounting with 
VIRT_CPU_ACCOUNTING_GEN")

  == Regression Potential ==
  Low.  Also cc'd to stable, so it has had additionl upstream review.  Limited 
to powerpc.

  == Test Case ==
  A test kernel was built with this patch and tested by the original bug 
reporter.
  The bug reporter states the test kernel resolved the bug.


  == Comment: #0 - JENIFER HOPPER  - 2018-03-14 16:20:47 ==
  +++ This bug was initially created as a clone of Bug #163375 +++

  ---Problem Description---
  All KVM guest cpu utilization is being reported as sys% time in the host.
  It turns out Guest time accounting (CONFIG_VIRT_CPU_ACCOUNTING_GEN) has been 
broken since v4.13 by commit:

  commit 8b24e69fc47e43679bb29ddb481aa0e8dce2a3c5
  Author: Paul Mackerras 
  Date:   Mon Jun 26 15:45:51 2017 +1000

  KVM: PPC: Book3S HV: Close race with testing for signals on guest
  entry

  ---

  That is now fixed and upstream accepted in Paulus' tree as git commit:

  
https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-fixes=61bd0f66ff92d5ce765ff9850fd3cbfec773c560
  ("KVM: PPC: Book3S HV: Fix guest time accounting with 
VIRT_CPU_ACCOUNTING_GEN")

  Please include this patch in Ubuntu so that guest cpu accounting is
  correct.

  Contact Information = jhop...@us.ibm.com

  ---uname output---
  Linux ltc-b114 4.15.0-10-generic #11-Ubuntu SMP Tue Feb 13 18:21:52 UTC 2018 
ppc64le ppc64le ppc64le GNU/Linux

  Machine Type = 5104-22C

  ---Debugger---
  A debugger is not configured

  ---Steps to Reproduce---
   Start a KVM guest, run something that generates cpu utilization in the 
guest, observe mpstat on the host.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1755979] Re: Cpu utilization showing system time for kvm guests (performance) (sysstat)

[bugproxy]

** Tags removed: targetmilestone-inin---
** Tags added: targetmilestone-inin1804

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You received this bug notification because you are a member of Kernel
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https://bugs.launchpad.net/bugs/1755979

Title:
  Cpu utilization showing system time for kvm guests (performance)
  (sysstat)

Status in The Ubuntu-power-systems project:
  Fix Released
Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Artful:
  Fix Released
Status in linux source package in Bionic:
  Fix Released

Bug description:
  == SRU Justification ==
  All KVM guest cpu utilization is being reported as sys% time in the host.
  It turns out Guest time accounting (CONFIG_VIRT_CPU_ACCOUNTING_GEN) has
  been broken since v4.13 by commit 8b24e69fc47e436.

  Commit 61bd0f66ff92 fixes this bug and is included in mainline as of 
v4.16-rc5.
  The commit was cc'd to upstream stable, but has not yet landed in upstream 
4.15.

  == Fix ==
  61bd0f66ff92 ("KVM: PPC: Book3S HV: Fix guest time accounting with 
VIRT_CPU_ACCOUNTING_GEN")

  == Regression Potential ==
  Low.  Also cc'd to stable, so it has had additionl upstream review.  Limited 
to powerpc.

  == Test Case ==
  A test kernel was built with this patch and tested by the original bug 
reporter.
  The bug reporter states the test kernel resolved the bug.


  == Comment: #0 - JENIFER HOPPER  - 2018-03-14 16:20:47 ==
  +++ This bug was initially created as a clone of Bug #163375 +++

  ---Problem Description---
  All KVM guest cpu utilization is being reported as sys% time in the host.
  It turns out Guest time accounting (CONFIG_VIRT_CPU_ACCOUNTING_GEN) has been 
broken since v4.13 by commit:

  commit 8b24e69fc47e43679bb29ddb481aa0e8dce2a3c5
  Author: Paul Mackerras 
  Date:   Mon Jun 26 15:45:51 2017 +1000

  KVM: PPC: Book3S HV: Close race with testing for signals on guest
  entry

  ---

  That is now fixed and upstream accepted in Paulus' tree as git commit:

  
https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-fixes=61bd0f66ff92d5ce765ff9850fd3cbfec773c560
  ("KVM: PPC: Book3S HV: Fix guest time accounting with 
VIRT_CPU_ACCOUNTING_GEN")

  Please include this patch in Ubuntu so that guest cpu accounting is
  correct.

  Contact Information = jhop...@us.ibm.com

  ---uname output---
  Linux ltc-b114 4.15.0-10-generic #11-Ubuntu SMP Tue Feb 13 18:21:52 UTC 2018 
ppc64le ppc64le ppc64le GNU/Linux

  Machine Type = 5104-22C

  ---Debugger---
  A debugger is not configured

  ---Steps to Reproduce---
   Start a KVM guest, run something that generates cpu utilization in the 
guest, observe mpstat on the host.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1755979] Re: Cpu utilization showing system time for kvm guests (performance) (sysstat)

[Manoj Iyer]

** Changed in: ubuntu-power-systems
   Status: Fix Committed => Fix Released

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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/1755979

Title:
  Cpu utilization showing system time for kvm guests (performance)
  (sysstat)

Status in The Ubuntu-power-systems project:
  Fix Released
Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Artful:
  Fix Released
Status in linux source package in Bionic:
  Fix Released

Bug description:
  == SRU Justification ==
  All KVM guest cpu utilization is being reported as sys% time in the host.
  It turns out Guest time accounting (CONFIG_VIRT_CPU_ACCOUNTING_GEN) has
  been broken since v4.13 by commit 8b24e69fc47e436.

  Commit 61bd0f66ff92 fixes this bug and is included in mainline as of 
v4.16-rc5.
  The commit was cc'd to upstream stable, but has not yet landed in upstream 
4.15.

  == Fix ==
  61bd0f66ff92 ("KVM: PPC: Book3S HV: Fix guest time accounting with 
VIRT_CPU_ACCOUNTING_GEN")

  == Regression Potential ==
  Low.  Also cc'd to stable, so it has had additionl upstream review.  Limited 
to powerpc.

  == Test Case ==
  A test kernel was built with this patch and tested by the original bug 
reporter.
  The bug reporter states the test kernel resolved the bug.


  == Comment: #0 - JENIFER HOPPER  - 2018-03-14 16:20:47 ==
  +++ This bug was initially created as a clone of Bug #163375 +++

  ---Problem Description---
  All KVM guest cpu utilization is being reported as sys% time in the host.
  It turns out Guest time accounting (CONFIG_VIRT_CPU_ACCOUNTING_GEN) has been 
broken since v4.13 by commit:

  commit 8b24e69fc47e43679bb29ddb481aa0e8dce2a3c5
  Author: Paul Mackerras 
  Date:   Mon Jun 26 15:45:51 2017 +1000

  KVM: PPC: Book3S HV: Close race with testing for signals on guest
  entry

  ---

  That is now fixed and upstream accepted in Paulus' tree as git commit:

  
https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-fixes=61bd0f66ff92d5ce765ff9850fd3cbfec773c560
  ("KVM: PPC: Book3S HV: Fix guest time accounting with 
VIRT_CPU_ACCOUNTING_GEN")

  Please include this patch in Ubuntu so that guest cpu accounting is
  correct.

  Contact Information = jhop...@us.ibm.com

  ---uname output---
  Linux ltc-b114 4.15.0-10-generic #11-Ubuntu SMP Tue Feb 13 18:21:52 UTC 2018 
ppc64le ppc64le ppc64le GNU/Linux

  Machine Type = 5104-22C

  ---Debugger---
  A debugger is not configured

  ---Steps to Reproduce---
   Start a KVM guest, run something that generates cpu utilization in the 
guest, observe mpstat on the host.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1755979] Re: Cpu utilization showing system time for kvm guests (performance) (sysstat)

[Launchpad Bug Tracker]

This bug was fixed in the package linux - 4.13.0-39.44

---
linux (4.13.0-39.44) artful; urgency=medium

  * linux: 4.13.0-39.44 -proposed tracker (LP: #1761456)

  * intel-microcode 3.20180312.0 causes lockup at login screen(w/ linux-
image-4.13.0-37-generic) (LP: #1759920) // CVE-2017-5715 (Spectre v2
Intel) // CVE-2017-5754
- x86/mm: Reinitialize TLB state on hotplug and resume

  * intel-microcode 3.20180312.0 causes lockup at login screen(w/ linux-
image-4.13.0-37-generic) (LP: #1759920) // CVE-2017-5715 (Spectre v2 Intel)
- Revert "x86/mm: Only set IBPB when the new thread cannot ptrace current
  thread"
- x86/speculation: Use Indirect Branch Prediction Barrier in context switch

  * DKMS driver builds fail with: Cannot use CONFIG_STACK_VALIDATION=y, please
install libelf-dev, libelf-devel or elfutils-libelf-devel (LP: #1760876)
- [Packaging] include the retpoline extractor in the headers

  * retpoline hints: primary infrastructure and initial hints (LP: #1758856)
- [Packaging] retpoline-extract: flag *0xNNN(%reg) branches
- x86/speculation, objtool: Annotate indirect calls/jumps for objtool
- x86/speculation, objtool: Annotate indirect calls/jumps for objtool on 
32bit
- x86/paravirt, objtool: Annotate indirect calls
- [Packaging] retpoline -- add safe usage hint support
- [Packaging] retpoline-check -- only report additions
- [Packaging] retpoline -- widen indirect call/jmp detection
- [Packaging] retpoline -- elide %rip relative indirections
- [Packaging] retpoline -- clear hint information from packages
- KVM: x86: Make indirect calls in emulator speculation safe
- KVM: VMX: Make indirect call speculation safe
- x86/boot, objtool: Annotate indirect jump in secondary_startup_64()
- SAUCE: early/late -- annotate indirect calls in early/late initialisation
  code
- SAUCE: vga_set_mode -- avoid jump tables
- [Config] retpoline -- switch to new format
- [Packaging] retpoline hints -- handle missing files when RETPOLINE not
  enabled
- [Packaging] final-checks -- remove check for empty retpoline files

  * retpoline: ignore %cs:0xNNN constant indirections (LP: #1752655)
- [Packaging] retpoline -- elide %cs:0x constants on i386

  * zfs system process hung on container stop/delete (LP: #1754584)
- SAUCE: Fix non-prefaulted page deadlock (LP: #1754584)

  * zfs-linux 0.6.5.11-1ubuntu5 ADT test failure with linux 4.15.0-1.2
(LP: #1737761)
- SAUCE: (noup) Update zfs to 0.6.5.11-1ubuntu3.2

  * AT_BASE_PLATFORM in AUXV is absent on kernels available on Ubuntu 17.10
(LP: #1759312)
- powerpc/64s: Fix NULL AT_BASE_PLATFORM when using DT CPU features

  * btrfs and tar sparse truncate archives (LP: #1757565)
- Btrfs: move definition of the function btrfs_find_new_delalloc_bytes
- Btrfs: fix reported number of inode blocks after buffered append writes

  * efifb broken on ThunderX-based Gigabyte nodes (LP: #1758375)
- drivers/fbdev/efifb: Allow BAR to be moved instead of claiming it

  * Intel i40e PF reset due to incorrect MDD detection (continues...)
(LP: #1723127)
- i40e/i40evf: Account for frags split over multiple descriptors in check
  linearize

  * Fix an issue that when system in S3, USB keyboard can't wake up the system.
(LP: #1759511)
- ACPI / PM: Allow deeper wakeup power states with no _SxD nor _SxW

  * [8086:3e92] display becomes blank after S3 (LP: #1759188)
- drm/i915: Apply Display WA #1183 on skl, kbl, and cfl

  * add audio kernel patches for Raven (LP: #1758364)
- ALSA: hda: Add Raven PCI ID
- ALSA: hda/realtek - Fix ALC700 family no sound issue

  * Cpu utilization showing system time for kvm guests (performance) (sysstat)
(LP: #1755979)
- KVM: PPC: Book3S HV: Fix guest time accounting with 
VIRT_CPU_ACCOUNTING_GEN

  * Kernel panic on a nfsroot system (LP: #1734327)
- Revert "UBUNTU: SAUCE: LSM stacking: add stacking support to apparmor
  network hooks"
- Revert "UBUNTU: SAUCE: LSM stacking: LSM: Infrastructure management of the
  remaining blobs"

  * can't record sound via front headset port on the Dell Precision 3630
(LP: #1759088)
- ALSA: hda/realtek - Fix Dell headset Mic can't record

  * speaker can't output sound anymore after system resumes from S3 on a lenovo
machine with alc257 (LP: #1758829)
- ALSA: hda/realtek - Fix speaker no sound after system resume

  * hda driver initialization takes too much time on the machine with coffeelake
audio controller [8086:a348] (LP: #1758800)
- ALSA: hda - Force polling mode on CFL for fixing codec communication

  * Let headset-mode initialization be called on Dell Precision 3930
(LP: #1757584)
- ALSA: hda/realtek - Add headset mode support for Dell laptop

  * ubuntu_zram_smoke test will cause soft lockup on Artful ThunderX ARM64
(LP: #1755073)
- SAUCE: crypto: thunderx_zip: Fix 

[Kernel-packages] [Bug 1755979] Re: Cpu utilization showing system time for kvm guests (performance) (sysstat)

[Launchpad Bug Tracker]

This bug was fixed in the package linux - 4.15.0-15.16

---
linux (4.15.0-15.16) bionic; urgency=medium

  * linux: 4.15.0-15.16 -proposed tracker (LP: #1761177)

  * FFe: Enable configuring resume offset via sysfs (LP: #1760106)
- PM / hibernate: Make passing hibernate offsets more friendly

  * /dev/bcache/by-uuid links not created after reboot (LP: #1729145)
- SAUCE: (no-up) bcache: decouple emitting a cached_dev CHANGE uevent

  * Ubuntu18.04:POWER9:DD2.2 - Unable to start a KVM guest with default machine
type(pseries-bionic) complaining "KVM implementation does not support
Transactional Memory, try cap-htm=off" (kvm) (LP: #1752026)
- powerpc: Use feature bit for RTC presence rather than timebase presence
- powerpc: Book E: Remove unused CPU_FTR_L2CSR bit
- powerpc: Free up CPU feature bits on 64-bit machines
- powerpc: Add CPU feature bits for TM bug workarounds on POWER9 v2.2
- powerpc/powernv: Provide a way to force a core into SMT4 mode
- KVM: PPC: Book3S HV: Work around transactional memory bugs in POWER9
- KVM: PPC: Book3S HV: Work around XER[SO] bug in fake suspend mode
- KVM: PPC: Book3S HV: Work around TEXASR bug in fake suspend state

  * Important Kernel fixes to be backported for Power9 (kvm) (LP: #1758910)
- powerpc/mm: Fixup tlbie vs store ordering issue on POWER9

  * Ubuntu 18.04 - IO Hang on some namespaces when running HTX with 16
namespaces  (Bolt / NVMe) (LP: #1757497)
- powerpc/64s: Fix lost pending interrupt due to race causing lost update to
  irq_happened

  * fwts-efi-runtime-dkms 18.03.00-0ubuntu1: fwts-efi-runtime-dkms kernel module
failed to build (LP: #1760876)
- [Packaging] include the retpoline extractor in the headers

linux (4.15.0-14.15) bionic; urgency=medium

  * linux: 4.15.0-14.15 -proposed tracker (LP: #1760678)

  * [Bionic] mlx4 ETH - mlnx_qos failed when set some TC to vendor
(LP: #1758662)
- net/mlx4_en: Change default QoS settings

  * AT_BASE_PLATFORM in AUXV is absent on kernels available on Ubuntu 17.10
(LP: #1759312)
- powerpc/64s: Fix NULL AT_BASE_PLATFORM when using DT CPU features

  * Bionic update to 4.15.15 stable release (LP: #1760585)
- net: dsa: Fix dsa_is_user_port() test inversion
- openvswitch: meter: fix the incorrect calculation of max delta_t
- qed: Fix MPA unalign flow in case header is split across two packets.
- tcp: purge write queue upon aborting the connection
- qed: Fix non TCP packets should be dropped on iWARP ll2 connection
- sysfs: symlink: export sysfs_create_link_nowarn()
- net: phy: relax error checking when creating sysfs link netdev->phydev
- devlink: Remove redundant free on error path
- macvlan: filter out unsupported feature flags
- net: ipv6: keep sk status consistent after datagram connect failure
- ipv6: old_dport should be a __be16 in __ip6_datagram_connect()
- ipv6: sr: fix NULL pointer dereference when setting encap source address
- ipv6: sr: fix scheduling in RCU when creating seg6 lwtunnel state
- mlxsw: spectrum_buffers: Set a minimum quota for CPU port traffic
- net: phy: Tell caller result of phy_change()
- ipv6: Reflect MTU changes on PMTU of exceptions for MTU-less routes
- net sched actions: return explicit error when tunnel_key mode is not
  specified
- ppp: avoid loop in xmit recursion detection code
- rhashtable: Fix rhlist duplicates insertion
- test_rhashtable: add test case for rhltable with duplicate objects
- kcm: lock lower socket in kcm_attach
- sch_netem: fix skb leak in netem_enqueue()
- ieee802154: 6lowpan: fix possible NULL deref in lowpan_device_event()
- net: use skb_to_full_sk() in skb_update_prio()
- net: Fix hlist corruptions in inet_evict_bucket()
- s390/qeth: free netdevice when removing a card
- s390/qeth: when thread completes, wake up all waiters
- s390/qeth: lock read device while queueing next buffer
- s390/qeth: on channel error, reject further cmd requests
- soc/fsl/qbman: fix issue in qman_delete_cgr_safe()
- dpaa_eth: fix error in dpaa_remove()
- dpaa_eth: remove duplicate initialization
- dpaa_eth: increment the RX dropped counter when needed
- dpaa_eth: remove duplicate increment of the tx_errors counter
- dccp: check sk for closed state in dccp_sendmsg()
- ipv6: fix access to non-linear packet in ndisc_fill_redirect_hdr_option()
- l2tp: do not accept arbitrary sockets
- net: ethernet: arc: Fix a potential memory leak if an optional regulator 
is
  deferred
- net: ethernet: ti: cpsw: add check for in-band mode setting with RGMII PHY
  interface
- net: fec: Fix unbalanced PM runtime calls
- net/iucv: Free memory obtained by kzalloc
- netlink: avoid a double skb free in genlmsg_mcast()
- net: Only honor ifindex in IP_PKTINFO if non-0
- net: systemport: Rewrite __bcm_sysport_tx_reclaim()
- 

[Kernel-packages] [Bug 1755979] Re: Cpu utilization showing system time for kvm guests (performance) (sysstat)

[bugproxy]

--- Comment From jhop...@us.ibm.com 2018-04-11 12:01 EDT---
I verified the -proposed kernel fixes the issue:

10:59:35 AM  CPU%usr   %nice%sys %iowait%irq   %soft  %steal  
%guest  %gnice   %idle
10:59:37 AM  all0.010.000.080.000.000.010.00   
20.680.00   79.21
10:59:37 AM00.530.000.000.000.000.000.00   
51.340.00   48.13
10:59:37 AM10.000.000.000.000.000.000.00   
76.000.00   24.00

Selected version '4.13.0.39.42' (Ubuntu:17.10/artful-proposed [ppc64el])
for 'linux-image-generic'

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

-- 
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/1755979

Title:
  Cpu utilization showing system time for kvm guests (performance)
  (sysstat)

Status in The Ubuntu-power-systems project:
  Fix Committed
Status in linux package in Ubuntu:
  Fix Committed
Status in linux source package in Artful:
  Fix Committed
Status in linux source package in Bionic:
  Fix Committed

Bug description:
  == SRU Justification ==
  All KVM guest cpu utilization is being reported as sys% time in the host.
  It turns out Guest time accounting (CONFIG_VIRT_CPU_ACCOUNTING_GEN) has
  been broken since v4.13 by commit 8b24e69fc47e436.

  Commit 61bd0f66ff92 fixes this bug and is included in mainline as of 
v4.16-rc5.
  The commit was cc'd to upstream stable, but has not yet landed in upstream 
4.15.

  == Fix ==
  61bd0f66ff92 ("KVM: PPC: Book3S HV: Fix guest time accounting with 
VIRT_CPU_ACCOUNTING_GEN")

  == Regression Potential ==
  Low.  Also cc'd to stable, so it has had additionl upstream review.  Limited 
to powerpc.

  == Test Case ==
  A test kernel was built with this patch and tested by the original bug 
reporter.
  The bug reporter states the test kernel resolved the bug.


  == Comment: #0 - JENIFER HOPPER  - 2018-03-14 16:20:47 ==
  +++ This bug was initially created as a clone of Bug #163375 +++

  ---Problem Description---
  All KVM guest cpu utilization is being reported as sys% time in the host.
  It turns out Guest time accounting (CONFIG_VIRT_CPU_ACCOUNTING_GEN) has been 
broken since v4.13 by commit:

  commit 8b24e69fc47e43679bb29ddb481aa0e8dce2a3c5
  Author: Paul Mackerras 
  Date:   Mon Jun 26 15:45:51 2017 +1000

  KVM: PPC: Book3S HV: Close race with testing for signals on guest
  entry

  ---

  That is now fixed and upstream accepted in Paulus' tree as git commit:

  
https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-fixes=61bd0f66ff92d5ce765ff9850fd3cbfec773c560
  ("KVM: PPC: Book3S HV: Fix guest time accounting with 
VIRT_CPU_ACCOUNTING_GEN")

  Please include this patch in Ubuntu so that guest cpu accounting is
  correct.

  Contact Information = jhop...@us.ibm.com

  ---uname output---
  Linux ltc-b114 4.15.0-10-generic #11-Ubuntu SMP Tue Feb 13 18:21:52 UTC 2018 
ppc64le ppc64le ppc64le GNU/Linux

  Machine Type = 5104-22C

  ---Debugger---
  A debugger is not configured

  ---Steps to Reproduce---
   Start a KVM guest, run something that generates cpu utilization in the 
guest, observe mpstat on the host.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu-power-systems/+bug/1755979/+subscriptions

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[Kernel-packages] [Bug 1755979] Re: Cpu utilization showing system time for kvm guests (performance) (sysstat)

[Brad Figg]

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-
artful' to 'verification-done-artful'. If the problem still exists,
change the tag 'verification-needed-artful' to 'verification-failed-
artful'.

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-artful

-- 
You received this bug notification because you are a member of Kernel
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https://bugs.launchpad.net/bugs/1755979

Title:
  Cpu utilization showing system time for kvm guests (performance)
  (sysstat)

Status in The Ubuntu-power-systems project:
  Fix Committed
Status in linux package in Ubuntu:
  Fix Committed
Status in linux source package in Artful:
  Fix Committed
Status in linux source package in Bionic:
  Fix Committed

Bug description:
  == SRU Justification ==
  All KVM guest cpu utilization is being reported as sys% time in the host.
  It turns out Guest time accounting (CONFIG_VIRT_CPU_ACCOUNTING_GEN) has
  been broken since v4.13 by commit 8b24e69fc47e436.

  Commit 61bd0f66ff92 fixes this bug and is included in mainline as of 
v4.16-rc5.
  The commit was cc'd to upstream stable, but has not yet landed in upstream 
4.15.

  == Fix ==
  61bd0f66ff92 ("KVM: PPC: Book3S HV: Fix guest time accounting with 
VIRT_CPU_ACCOUNTING_GEN")

  == Regression Potential ==
  Low.  Also cc'd to stable, so it has had additionl upstream review.  Limited 
to powerpc.

  == Test Case ==
  A test kernel was built with this patch and tested by the original bug 
reporter.
  The bug reporter states the test kernel resolved the bug.


  == Comment: #0 - JENIFER HOPPER  - 2018-03-14 16:20:47 ==
  +++ This bug was initially created as a clone of Bug #163375 +++

  ---Problem Description---
  All KVM guest cpu utilization is being reported as sys% time in the host.
  It turns out Guest time accounting (CONFIG_VIRT_CPU_ACCOUNTING_GEN) has been 
broken since v4.13 by commit:

  commit 8b24e69fc47e43679bb29ddb481aa0e8dce2a3c5
  Author: Paul Mackerras 
  Date:   Mon Jun 26 15:45:51 2017 +1000

  KVM: PPC: Book3S HV: Close race with testing for signals on guest
  entry

  ---

  That is now fixed and upstream accepted in Paulus' tree as git commit:

  
https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-fixes=61bd0f66ff92d5ce765ff9850fd3cbfec773c560
  ("KVM: PPC: Book3S HV: Fix guest time accounting with 
VIRT_CPU_ACCOUNTING_GEN")

  Please include this patch in Ubuntu so that guest cpu accounting is
  correct.

  Contact Information = jhop...@us.ibm.com

  ---uname output---
  Linux ltc-b114 4.15.0-10-generic #11-Ubuntu SMP Tue Feb 13 18:21:52 UTC 2018 
ppc64le ppc64le ppc64le GNU/Linux

  Machine Type = 5104-22C

  ---Debugger---
  A debugger is not configured

  ---Steps to Reproduce---
   Start a KVM guest, run something that generates cpu utilization in the 
guest, observe mpstat on the host.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1755979] Re: Cpu utilization showing system time for kvm guests (performance) (sysstat)

[Kleber Sacilotto de Souza]

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

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https://bugs.launchpad.net/bugs/1755979

Title:
  Cpu utilization showing system time for kvm guests (performance)
  (sysstat)

Status in The Ubuntu-power-systems project:
  In Progress
Status in linux package in Ubuntu:
  Fix Committed
Status in linux source package in Artful:
  Fix Committed
Status in linux source package in Bionic:
  Fix Committed

Bug description:
  == SRU Justification ==
  All KVM guest cpu utilization is being reported as sys% time in the host.
  It turns out Guest time accounting (CONFIG_VIRT_CPU_ACCOUNTING_GEN) has
  been broken since v4.13 by commit 8b24e69fc47e436.

  Commit 61bd0f66ff92 fixes this bug and is included in mainline as of 
v4.16-rc5.
  The commit was cc'd to upstream stable, but has not yet landed in upstream 
4.15.

  == Fix ==
  61bd0f66ff92 ("KVM: PPC: Book3S HV: Fix guest time accounting with 
VIRT_CPU_ACCOUNTING_GEN")

  == Regression Potential ==
  Low.  Also cc'd to stable, so it has had additionl upstream review.  Limited 
to powerpc.

  == Test Case ==
  A test kernel was built with this patch and tested by the original bug 
reporter.
  The bug reporter states the test kernel resolved the bug.


  == Comment: #0 - JENIFER HOPPER  - 2018-03-14 16:20:47 ==
  +++ This bug was initially created as a clone of Bug #163375 +++

  ---Problem Description---
  All KVM guest cpu utilization is being reported as sys% time in the host.
  It turns out Guest time accounting (CONFIG_VIRT_CPU_ACCOUNTING_GEN) has been 
broken since v4.13 by commit:

  commit 8b24e69fc47e43679bb29ddb481aa0e8dce2a3c5
  Author: Paul Mackerras 
  Date:   Mon Jun 26 15:45:51 2017 +1000

  KVM: PPC: Book3S HV: Close race with testing for signals on guest
  entry

  ---

  That is now fixed and upstream accepted in Paulus' tree as git commit:

  
https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-fixes=61bd0f66ff92d5ce765ff9850fd3cbfec773c560
  ("KVM: PPC: Book3S HV: Fix guest time accounting with 
VIRT_CPU_ACCOUNTING_GEN")

  Please include this patch in Ubuntu so that guest cpu accounting is
  correct.

  Contact Information = jhop...@us.ibm.com

  ---uname output---
  Linux ltc-b114 4.15.0-10-generic #11-Ubuntu SMP Tue Feb 13 18:21:52 UTC 2018 
ppc64le ppc64le ppc64le GNU/Linux

  Machine Type = 5104-22C

  ---Debugger---
  A debugger is not configured

  ---Steps to Reproduce---
   Start a KVM guest, run something that generates cpu utilization in the 
guest, observe mpstat on the host.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1755979] Re: Cpu utilization showing system time for kvm guests (performance) (sysstat)

[Frank Heimes]

** Changed in: ubuntu-power-systems
   Status: In Progress => Fix Committed

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You received this bug notification because you are a member of Kernel
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https://bugs.launchpad.net/bugs/1755979

Title:
  Cpu utilization showing system time for kvm guests (performance)
  (sysstat)

Status in The Ubuntu-power-systems project:
  Fix Committed
Status in linux package in Ubuntu:
  Fix Committed
Status in linux source package in Artful:
  Fix Committed
Status in linux source package in Bionic:
  Fix Committed

Bug description:
  == SRU Justification ==
  All KVM guest cpu utilization is being reported as sys% time in the host.
  It turns out Guest time accounting (CONFIG_VIRT_CPU_ACCOUNTING_GEN) has
  been broken since v4.13 by commit 8b24e69fc47e436.

  Commit 61bd0f66ff92 fixes this bug and is included in mainline as of 
v4.16-rc5.
  The commit was cc'd to upstream stable, but has not yet landed in upstream 
4.15.

  == Fix ==
  61bd0f66ff92 ("KVM: PPC: Book3S HV: Fix guest time accounting with 
VIRT_CPU_ACCOUNTING_GEN")

  == Regression Potential ==
  Low.  Also cc'd to stable, so it has had additionl upstream review.  Limited 
to powerpc.

  == Test Case ==
  A test kernel was built with this patch and tested by the original bug 
reporter.
  The bug reporter states the test kernel resolved the bug.


  == Comment: #0 - JENIFER HOPPER  - 2018-03-14 16:20:47 ==
  +++ This bug was initially created as a clone of Bug #163375 +++

  ---Problem Description---
  All KVM guest cpu utilization is being reported as sys% time in the host.
  It turns out Guest time accounting (CONFIG_VIRT_CPU_ACCOUNTING_GEN) has been 
broken since v4.13 by commit:

  commit 8b24e69fc47e43679bb29ddb481aa0e8dce2a3c5
  Author: Paul Mackerras 
  Date:   Mon Jun 26 15:45:51 2017 +1000

  KVM: PPC: Book3S HV: Close race with testing for signals on guest
  entry

  ---

  That is now fixed and upstream accepted in Paulus' tree as git commit:

  
https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-fixes=61bd0f66ff92d5ce765ff9850fd3cbfec773c560
  ("KVM: PPC: Book3S HV: Fix guest time accounting with 
VIRT_CPU_ACCOUNTING_GEN")

  Please include this patch in Ubuntu so that guest cpu accounting is
  correct.

  Contact Information = jhop...@us.ibm.com

  ---uname output---
  Linux ltc-b114 4.15.0-10-generic #11-Ubuntu SMP Tue Feb 13 18:21:52 UTC 2018 
ppc64le ppc64le ppc64le GNU/Linux

  Machine Type = 5104-22C

  ---Debugger---
  A debugger is not configured

  ---Steps to Reproduce---
   Start a KVM guest, run something that generates cpu utilization in the 
guest, observe mpstat on the host.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1755979] Re: Cpu utilization showing system time for kvm guests (performance) (sysstat)

[Thadeu Lima de Souza Cascardo]

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

-- 
You received this bug notification because you are a member of Kernel
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https://bugs.launchpad.net/bugs/1755979

Title:
  Cpu utilization showing system time for kvm guests (performance)
  (sysstat)

Status in The Ubuntu-power-systems project:
  In Progress
Status in linux package in Ubuntu:
  Fix Committed
Status in linux source package in Artful:
  In Progress
Status in linux source package in Bionic:
  Fix Committed

Bug description:
  == SRU Justification ==
  All KVM guest cpu utilization is being reported as sys% time in the host.
  It turns out Guest time accounting (CONFIG_VIRT_CPU_ACCOUNTING_GEN) has
  been broken since v4.13 by commit 8b24e69fc47e436.

  Commit 61bd0f66ff92 fixes this bug and is included in mainline as of 
v4.16-rc5.
  The commit was cc'd to upstream stable, but has not yet landed in upstream 
4.15.

  == Fix ==
  61bd0f66ff92 ("KVM: PPC: Book3S HV: Fix guest time accounting with 
VIRT_CPU_ACCOUNTING_GEN")

  == Regression Potential ==
  Low.  Also cc'd to stable, so it has had additionl upstream review.  Limited 
to powerpc.

  == Test Case ==
  A test kernel was built with this patch and tested by the original bug 
reporter.
  The bug reporter states the test kernel resolved the bug.


  == Comment: #0 - JENIFER HOPPER  - 2018-03-14 16:20:47 ==
  +++ This bug was initially created as a clone of Bug #163375 +++

  ---Problem Description---
  All KVM guest cpu utilization is being reported as sys% time in the host.
  It turns out Guest time accounting (CONFIG_VIRT_CPU_ACCOUNTING_GEN) has been 
broken since v4.13 by commit:

  commit 8b24e69fc47e43679bb29ddb481aa0e8dce2a3c5
  Author: Paul Mackerras 
  Date:   Mon Jun 26 15:45:51 2017 +1000

  KVM: PPC: Book3S HV: Close race with testing for signals on guest
  entry

  ---

  That is now fixed and upstream accepted in Paulus' tree as git commit:

  
https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-fixes=61bd0f66ff92d5ce765ff9850fd3cbfec773c560
  ("KVM: PPC: Book3S HV: Fix guest time accounting with 
VIRT_CPU_ACCOUNTING_GEN")

  Please include this patch in Ubuntu so that guest cpu accounting is
  correct.

  Contact Information = jhop...@us.ibm.com

  ---uname output---
  Linux ltc-b114 4.15.0-10-generic #11-Ubuntu SMP Tue Feb 13 18:21:52 UTC 2018 
ppc64le ppc64le ppc64le GNU/Linux

  Machine Type = 5104-22C

  ---Debugger---
  A debugger is not configured

  ---Steps to Reproduce---
   Start a KVM guest, run something that generates cpu utilization in the 
guest, observe mpstat on the host.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu-power-systems/+bug/1755979/+subscriptions

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[Kernel-packages] [Bug 1755979] Re: Cpu utilization showing system time for kvm guests (performance) (sysstat)

[Joseph Salisbury]

SRU Request submitted:
https://lists.ubuntu.com/archives/kernel-team/2018-March/090973.html

** Description changed:

+ == SRU Justification ==
+ All KVM guest cpu utilization is being reported as sys% time in the host.
+ It turns out Guest time accounting (CONFIG_VIRT_CPU_ACCOUNTING_GEN) has
+ been broken since v4.13 by commit 8b24e69fc47e436.
+ 
+ Commit 61bd0f66ff92 fixes this bug and is included in mainline as of 
v4.16-rc5.
+ The commit was cc'd to upstream stable, but has not yet landed in upstream 
4.15.
+ 
+ == Fix ==
+ 61bd0f66ff92 ("KVM: PPC: Book3S HV: Fix guest time accounting with 
VIRT_CPU_ACCOUNTING_GEN")
+ 
+ == Regression Potential ==
+ Low.  Also cc'd to stable, so it has had additionl upstream review.  Limited 
to powerpc.
+ 
+ == Test Case ==
+ A test kernel was built with this patch and tested by the original bug 
reporter.
+ The bug reporter states the test kernel resolved the bug.
+ 
+ 
  == Comment: #0 - JENIFER HOPPER  - 2018-03-14 16:20:47 ==
  +++ This bug was initially created as a clone of Bug #163375 +++
  
  ---Problem Description---
  All KVM guest cpu utilization is being reported as sys% time in the host.
  It turns out Guest time accounting (CONFIG_VIRT_CPU_ACCOUNTING_GEN) has been 
broken since v4.13 by commit:
  
  commit 8b24e69fc47e43679bb29ddb481aa0e8dce2a3c5
  Author: Paul Mackerras 
  Date:   Mon Jun 26 15:45:51 2017 +1000
  
  KVM: PPC: Book3S HV: Close race with testing for signals on guest entry
  
  ---
  
  That is now fixed and upstream accepted in Paulus' tree as git commit:
  
  
https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-fixes=61bd0f66ff92d5ce765ff9850fd3cbfec773c560
  ("KVM: PPC: Book3S HV: Fix guest time accounting with 
VIRT_CPU_ACCOUNTING_GEN")
  
- Please include this patch in Ubuntu so that guest cpu accounting is correct. 
-  
- Contact Information = jhop...@us.ibm.com 
-  
+ Please include this patch in Ubuntu so that guest cpu accounting is
+ correct.
+ 
+ Contact Information = jhop...@us.ibm.com
+ 
  ---uname output---
  Linux ltc-b114 4.15.0-10-generic #11-Ubuntu SMP Tue Feb 13 18:21:52 UTC 2018 
ppc64le ppc64le ppc64le GNU/Linux
-  
- Machine Type = 5104-22C 
-  
+ 
+ Machine Type = 5104-22C
+ 
  ---Debugger---
  A debugger is not configured
-  
+ 
  ---Steps to Reproduce---
-  Start a KVM guest, run something that generates cpu utilization in the 
guest, observe mpstat on the host.
+  Start a KVM guest, run something that generates cpu utilization in the 
guest, observe mpstat on the host.

-- 
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/1755979

Title:
  Cpu utilization showing system time for kvm guests (performance)
  (sysstat)

Status in The Ubuntu-power-systems project:
  In Progress
Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Artful:
  In Progress
Status in linux source package in Bionic:
  In Progress

Bug description:
  == SRU Justification ==
  All KVM guest cpu utilization is being reported as sys% time in the host.
  It turns out Guest time accounting (CONFIG_VIRT_CPU_ACCOUNTING_GEN) has
  been broken since v4.13 by commit 8b24e69fc47e436.

  Commit 61bd0f66ff92 fixes this bug and is included in mainline as of 
v4.16-rc5.
  The commit was cc'd to upstream stable, but has not yet landed in upstream 
4.15.

  == Fix ==
  61bd0f66ff92 ("KVM: PPC: Book3S HV: Fix guest time accounting with 
VIRT_CPU_ACCOUNTING_GEN")

  == Regression Potential ==
  Low.  Also cc'd to stable, so it has had additionl upstream review.  Limited 
to powerpc.

  == Test Case ==
  A test kernel was built with this patch and tested by the original bug 
reporter.
  The bug reporter states the test kernel resolved the bug.


  == Comment: #0 - JENIFER HOPPER  - 2018-03-14 16:20:47 ==
  +++ This bug was initially created as a clone of Bug #163375 +++

  ---Problem Description---
  All KVM guest cpu utilization is being reported as sys% time in the host.
  It turns out Guest time accounting (CONFIG_VIRT_CPU_ACCOUNTING_GEN) has been 
broken since v4.13 by commit:

  commit 8b24e69fc47e43679bb29ddb481aa0e8dce2a3c5
  Author: Paul Mackerras 
  Date:   Mon Jun 26 15:45:51 2017 +1000

  KVM: PPC: Book3S HV: Close race with testing for signals on guest
  entry

  ---

  That is now fixed and upstream accepted in Paulus' tree as git commit:

  
https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-fixes=61bd0f66ff92d5ce765ff9850fd3cbfec773c560
  ("KVM: PPC: Book3S HV: Fix guest time accounting with 
VIRT_CPU_ACCOUNTING_GEN")

  Please include this patch in Ubuntu so that guest cpu accounting is
  correct.

  Contact Information = jhop...@us.ibm.com

  ---uname output---
  Linux ltc-b114 4.15.0-10-generic #11-Ubuntu SMP Tue Feb 13 18:21:52 UTC 2018 
ppc64le ppc64le ppc64le GNU/Linux

[Kernel-packages] [Bug 1755979] Re: Cpu utilization showing system time for kvm guests (performance) (sysstat)

[Frank Heimes]

** Changed in: ubuntu-power-systems
   Status: Triaged => In Progress

-- 
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/1755979

Title:
  Cpu utilization showing system time for kvm guests (performance)
  (sysstat)

Status in The Ubuntu-power-systems project:
  In Progress
Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Artful:
  In Progress
Status in linux source package in Bionic:
  In Progress

Bug description:
  == Comment: #0 - JENIFER HOPPER  - 2018-03-14 16:20:47 ==
  +++ This bug was initially created as a clone of Bug #163375 +++

  ---Problem Description---
  All KVM guest cpu utilization is being reported as sys% time in the host.
  It turns out Guest time accounting (CONFIG_VIRT_CPU_ACCOUNTING_GEN) has been 
broken since v4.13 by commit:

  commit 8b24e69fc47e43679bb29ddb481aa0e8dce2a3c5
  Author: Paul Mackerras 
  Date:   Mon Jun 26 15:45:51 2017 +1000

  KVM: PPC: Book3S HV: Close race with testing for signals on guest
  entry

  ---

  That is now fixed and upstream accepted in Paulus' tree as git commit:

  
https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-fixes=61bd0f66ff92d5ce765ff9850fd3cbfec773c560
  ("KVM: PPC: Book3S HV: Fix guest time accounting with 
VIRT_CPU_ACCOUNTING_GEN")

  Please include this patch in Ubuntu so that guest cpu accounting is correct. 
   
  Contact Information = jhop...@us.ibm.com 
   
  ---uname output---
  Linux ltc-b114 4.15.0-10-generic #11-Ubuntu SMP Tue Feb 13 18:21:52 UTC 2018 
ppc64le ppc64le ppc64le GNU/Linux
   
  Machine Type = 5104-22C 
   
  ---Debugger---
  A debugger is not configured
   
  ---Steps to Reproduce---
   Start a KVM guest, run something that generates cpu utilization in the 
guest, observe mpstat on the host.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1755979] Re: Cpu utilization showing system time for kvm guests (performance) (sysstat)

[Joseph Salisbury]

I built a test kernel with commit 61bd0f66ff92.  The test kernel can be 
downloaded from:
http://kernel.ubuntu.com/~jsalisbury/lp1755979

Can you test this kernel and see if it resolves this bug?

Note, to test this kernel, you need to install both the linux-image and
linux-image-extra .deb packages.

Thanks in advance!

-- 
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/1755979

Title:
  Cpu utilization showing system time for kvm guests (performance)
  (sysstat)

Status in The Ubuntu-power-systems project:
  Triaged
Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Artful:
  In Progress
Status in linux source package in Bionic:
  In Progress

Bug description:
  == Comment: #0 - JENIFER HOPPER  - 2018-03-14 16:20:47 ==
  +++ This bug was initially created as a clone of Bug #163375 +++

  ---Problem Description---
  All KVM guest cpu utilization is being reported as sys% time in the host.
  It turns out Guest time accounting (CONFIG_VIRT_CPU_ACCOUNTING_GEN) has been 
broken since v4.13 by commit:

  commit 8b24e69fc47e43679bb29ddb481aa0e8dce2a3c5
  Author: Paul Mackerras 
  Date:   Mon Jun 26 15:45:51 2017 +1000

  KVM: PPC: Book3S HV: Close race with testing for signals on guest
  entry

  ---

  That is now fixed and upstream accepted in Paulus' tree as git commit:

  
https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-fixes=61bd0f66ff92d5ce765ff9850fd3cbfec773c560
  ("KVM: PPC: Book3S HV: Fix guest time accounting with 
VIRT_CPU_ACCOUNTING_GEN")

  Please include this patch in Ubuntu so that guest cpu accounting is correct. 
   
  Contact Information = jhop...@us.ibm.com 
   
  ---uname output---
  Linux ltc-b114 4.15.0-10-generic #11-Ubuntu SMP Tue Feb 13 18:21:52 UTC 2018 
ppc64le ppc64le ppc64le GNU/Linux
   
  Machine Type = 5104-22C 
   
  ---Debugger---
  A debugger is not configured
   
  ---Steps to Reproduce---
   Start a KVM guest, run something that generates cpu utilization in the 
guest, observe mpstat on the host.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1755979] Re: Cpu utilization showing system time for kvm guests (performance) (sysstat)

[Joseph Salisbury]

** Also affects: linux (Ubuntu Bionic)
   Importance: High
 Assignee: Ubuntu on IBM Power Systems Bug Triage (ubuntu-power-triage)
   Status: Triaged

** Also affects: linux (Ubuntu Artful)
   Importance: Undecided
   Status: New

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

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

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

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

** Changed in: linux (Ubuntu Bionic)
 Assignee: Ubuntu on IBM Power Systems Bug Triage (ubuntu-power-triage) => 
Joseph Salisbury (jsalisbury)

-- 
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/1755979

Title:
  Cpu utilization showing system time for kvm guests (performance)
  (sysstat)

Status in The Ubuntu-power-systems project:
  Triaged
Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Artful:
  In Progress
Status in linux source package in Bionic:
  In Progress

Bug description:
  == Comment: #0 - JENIFER HOPPER  - 2018-03-14 16:20:47 ==
  +++ This bug was initially created as a clone of Bug #163375 +++

  ---Problem Description---
  All KVM guest cpu utilization is being reported as sys% time in the host.
  It turns out Guest time accounting (CONFIG_VIRT_CPU_ACCOUNTING_GEN) has been 
broken since v4.13 by commit:

  commit 8b24e69fc47e43679bb29ddb481aa0e8dce2a3c5
  Author: Paul Mackerras 
  Date:   Mon Jun 26 15:45:51 2017 +1000

  KVM: PPC: Book3S HV: Close race with testing for signals on guest
  entry

  ---

  That is now fixed and upstream accepted in Paulus' tree as git commit:

  
https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-fixes=61bd0f66ff92d5ce765ff9850fd3cbfec773c560
  ("KVM: PPC: Book3S HV: Fix guest time accounting with 
VIRT_CPU_ACCOUNTING_GEN")

  Please include this patch in Ubuntu so that guest cpu accounting is correct. 
   
  Contact Information = jhop...@us.ibm.com 
   
  ---uname output---
  Linux ltc-b114 4.15.0-10-generic #11-Ubuntu SMP Tue Feb 13 18:21:52 UTC 2018 
ppc64le ppc64le ppc64le GNU/Linux
   
  Machine Type = 5104-22C 
   
  ---Debugger---
  A debugger is not configured
   
  ---Steps to Reproduce---
   Start a KVM guest, run something that generates cpu utilization in the 
guest, observe mpstat on the host.

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[Kernel-packages] [Bug 1755979] Re: Cpu utilization showing system time for kvm guests (performance) (sysstat)

[Joseph Salisbury]

** Changed in: linux (Ubuntu)
   Status: New => Triaged

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

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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/1755979

Title:
  Cpu utilization showing system time for kvm guests (performance)
  (sysstat)

Status in The Ubuntu-power-systems project:
  Triaged
Status in linux package in Ubuntu:
  Triaged

Bug description:
  == Comment: #0 - JENIFER HOPPER  - 2018-03-14 16:20:47 ==
  +++ This bug was initially created as a clone of Bug #163375 +++

  ---Problem Description---
  All KVM guest cpu utilization is being reported as sys% time in the host.
  It turns out Guest time accounting (CONFIG_VIRT_CPU_ACCOUNTING_GEN) has been 
broken since v4.13 by commit:

  commit 8b24e69fc47e43679bb29ddb481aa0e8dce2a3c5
  Author: Paul Mackerras 
  Date:   Mon Jun 26 15:45:51 2017 +1000

  KVM: PPC: Book3S HV: Close race with testing for signals on guest
  entry

  ---

  That is now fixed and upstream accepted in Paulus' tree as git commit:

  
https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-fixes=61bd0f66ff92d5ce765ff9850fd3cbfec773c560
  ("KVM: PPC: Book3S HV: Fix guest time accounting with 
VIRT_CPU_ACCOUNTING_GEN")

  Please include this patch in Ubuntu so that guest cpu accounting is correct. 
   
  Contact Information = jhop...@us.ibm.com 
   
  ---uname output---
  Linux ltc-b114 4.15.0-10-generic #11-Ubuntu SMP Tue Feb 13 18:21:52 UTC 2018 
ppc64le ppc64le ppc64le GNU/Linux
   
  Machine Type = 5104-22C 
   
  ---Debugger---
  A debugger is not configured
   
  ---Steps to Reproduce---
   Start a KVM guest, run something that generates cpu utilization in the 
guest, observe mpstat on the host.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu-power-systems/+bug/1755979/+subscriptions

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[Kernel-packages] [Bug 1755979] Re: Cpu utilization showing system time for kvm guests (performance) (sysstat)

[Frank Heimes]

** Also affects: ubuntu-power-systems
   Importance: Undecided
   Status: New

** Changed in: ubuntu-power-systems
   Importance: Undecided => High

** Package changed: kernel-package (Ubuntu) => linux (Ubuntu)

** Changed in: ubuntu-power-systems
 Assignee: (unassigned) => Canonical Kernel Team (canonical-kernel-team)

** Changed in: ubuntu-power-systems
   Status: New => Triaged

** Tags added: triage-g

-- 
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/1755979

Title:
  Cpu utilization showing system time for kvm guests (performance)
  (sysstat)

Status in The Ubuntu-power-systems project:
  Triaged
Status in linux package in Ubuntu:
  New

Bug description:
  == Comment: #0 - JENIFER HOPPER  - 2018-03-14 16:20:47 ==
  +++ This bug was initially created as a clone of Bug #163375 +++

  ---Problem Description---
  All KVM guest cpu utilization is being reported as sys% time in the host.
  It turns out Guest time accounting (CONFIG_VIRT_CPU_ACCOUNTING_GEN) has been 
broken since v4.13 by commit:

  commit 8b24e69fc47e43679bb29ddb481aa0e8dce2a3c5
  Author: Paul Mackerras 
  Date:   Mon Jun 26 15:45:51 2017 +1000

  KVM: PPC: Book3S HV: Close race with testing for signals on guest
  entry

  ---

  That is now fixed and upstream accepted in Paulus' tree as git commit:

  
https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-fixes=61bd0f66ff92d5ce765ff9850fd3cbfec773c560
  ("KVM: PPC: Book3S HV: Fix guest time accounting with 
VIRT_CPU_ACCOUNTING_GEN")

  Please include this patch in Ubuntu so that guest cpu accounting is correct. 
   
  Contact Information = jhop...@us.ibm.com 
   
  ---uname output---
  Linux ltc-b114 4.15.0-10-generic #11-Ubuntu SMP Tue Feb 13 18:21:52 UTC 2018 
ppc64le ppc64le ppc64le GNU/Linux
   
  Machine Type = 5104-22C 
   
  ---Debugger---
  A debugger is not configured
   
  ---Steps to Reproduce---
   Start a KVM guest, run something that generates cpu utilization in the 
guest, observe mpstat on the host.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu-power-systems/+bug/1755979/+subscriptions

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