Hello Stefan, or anyone else affected,

Accepted xen into yakkety-proposed. The package will build now and be
available at https://launchpad.net/ubuntu/+source/xen/4.7.2-0ubuntu1 in
a few hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, and change the tag
from verification-needed to verification-done. If it does not fix the
bug for you, please add a comment stating that, and change the tag to
verification-failed.  In either case, details of your testing will help
us make a better decision.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in

** Tags added: verification-needed

You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.

  Xen HVM guests running linux 4.10 fail to boot on Intel hosts

Status in linux package in Ubuntu:
  Won't Fix
Status in xen package in Ubuntu:
  Fix Released
Status in linux source package in Trusty:
Status in xen source package in Trusty:
  Fix Committed
Status in linux source package in Xenial:
Status in xen source package in Xenial:
  Fix Committed
Status in linux source package in Yakkety:
Status in xen source package in Yakkety:
  Fix Committed
Status in linux source package in Zesty:
  Won't Fix
Status in xen source package in Zesty:
  Fix Released

Bug description:
  Starting with Linux kernel 4.10, the kernel does some sanity checking
  on the TSC_ADJUST MSR. Xen has implemented some support for that MSR
  in the hypervisor (Xen 4.3 and later) for HVM guests. But boot and
  secondary vCPUs are set up inconsistently. This causes the boot of a
  4.10 HVM guest to hang early on boot.

  This was fixed in the hypervisor by:

    commit 98297f09bd07bb63407909aae1d309d8adeb572e
    x86/hvm: do not set msr_tsc_adjust on hvm_set_guest_tsc_fixed

  That fix would be contained in 4.6.5 and 4.7.2 and would be in 4.8.1
  (not released, yet) which mean that Ubuntu 14.04/16.04/16.10 and 17.04
  currently are affected.


  SRU Justification:

  Impact: Without the TSC_ADJUST MSR fix, 4.10 and later kernels will
  get stuck at boot when running as (PV)HVM guests on Xen 4.3 and later.

  Fix: Above fix either individually applied or as part of Xen stable
  stream (for Xen 4.7.x and 4.6.x) resolves the issue.

  - Requires Intel based host which supports the TSC_ADJUST MSR
  - Configured as Xen host
  - HVM guest running Zesty/17.04
  - Stuck at boot before, normal booting OS after

To manage notifications about this bug go to:

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