I built a test kernel with the proposed patch from upstream.  The test kernel 
can be downloaded from:

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

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Packages, which is subscribed to linux in Ubuntu.

  X1Carbon comes to a crawl during high CPU usage tasks

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

Bug description:
  My X1Carbon becomes quite laggy, the cursor hangs for a few seconds
  and then resumes while my system is compiling some code, or lets says
  PyCharm is indexing things or Android Studio is compiling some code. I
  was using 4.4 on Xenial a few days ago and everything was working just
  fine. Installed Yakkety and this issue happens.

  `stress -c 4` <-- that results in system slowness.

  I will downgrade the kernel and see if that mitigates the issue.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.10
  Package: linux-image-4.8.0-15-generic 4.8.0-15.16
  ProcVersionSignature: Ubuntu 4.8.0-15.16-generic 4.8.0-rc7
  Uname: Linux 4.8.0-15-generic x86_64
  ApportVersion: 2.20.3-0ubuntu7
  Architecture: amd64
   /dev/snd/pcmC1D0p:   om26er     3390 F...m pulseaudio
   /dev/snd/controlC1:  om26er     3390 F.... pulseaudio
   /dev/snd/controlC0:  om26er     3390 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Fri Sep 23 21:40:34 2016
  HibernationDevice: RESUME=UUID=a92c85ab-cca3-4afc-abf1-3516f193129e
  InstallationDate: Installed on 2016-09-21 (1 days ago)
  InstallationMedia: Ubuntu 16.10 "Yakkety Yak" - Alpha amd64 (20160921)
  MachineType: LENOVO 20BSCTO1WW
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.8.0-15-generic.efi.signed 
root=UUID=01b0a4a0-d791-46e8-a212-1f769cff3a4b ro quiet splash vt.handoff=7
   linux-restricted-modules-4.8.0-15-generic N/A
   linux-backports-modules-4.8.0-15-generic  N/A
   linux-firmware                            1.161
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/13/2015
  dmi.bios.vendor: LENOVO
  dmi.bios.version: N14ET32W (1.10 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20BSCTO1WW
  dmi.board.vendor: LENOVO
  dmi.board.version: SDK0E50510 WIN
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: None
  dmi.product.name: 20BSCTO1WW
  dmi.product.version: ThinkPad X1 Carbon 3rd
  dmi.sys.vendor: LENOVO

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