The server works now over 20 hours with approx 10 vm's without any
problems. so i think the problem is solved for me. let's hope it's
included fast in the 4.13 packages of hwe

-- 
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/1741655

Title:
  Regression: KVM no longer supports Intel CPUs without Virtual NMI

Status in linux package in Ubuntu:
  In Progress
Status in linux-hwe package in Ubuntu:
  New
Status in linux source package in Artful:
  In Progress
Status in linux-hwe source package in Artful:
  New
Status in linux source package in Bionic:
  In Progress
Status in linux-hwe source package in Bionic:
  New

Bug description:
  Since upgrading from zesty to artful, I'm not longer able to use KVM on my 
server:
  # modprobe kvm-intel
  modprobe: ERROR: could not insert 'kvm_intel': Input/output error

  Searching tells me this is caused by requiring Virtual NMI support[1]

  Running the script provided on the mailing list[1] to check virtualization 
features confirms my CPU (Xeon E5345) doesn't support Virtual NMIs:
  # python features.py | grep NMI
    NMI exiting                              yes
    Virtual NMIs                             no
    NMI-window exiting                       no

  Virtual NMI support was required in v4.12[1] and later reverted in
  v4.14.3[2] as some models (including Xeons) don't support it, even if
  others with the same core do.

  
  [1] https://bugzilla.redhat.com/show_bug.cgi?id=1490803
  [2] https://lkml.org/lkml/2017/8/7/231
  [3] 
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/commit/arch/x86/kvm/vmx.c?h=linux-4.13.y&id=2c82878b0cb38fd516fd612c67852a6bbf282003
  [4] 
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/commit/arch/x86/kvm/vmx.c?h=linux-4.14.y&id=a77360e989f3dc06e4f177a0837d533d13a20d91

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1741655/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to     : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp

Reply via email to