kernel-packages team mailing list archive

[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

Looks like this patch landed in v4.3-rc1:

commit 88c9281a9fba67636ab26c1fd6afbc78a632374f
Author: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>
Date:   Wed Aug 19 09:54:24 2015 -0700

    x86/hyperv: Mark the Hyper-V TSC as unstable


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

** Tags added: kernel-da-key kernel-hyper-v

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

-- 
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/1498206

Title:
  Fix CPU lockup on Hyper-V/Azure

Status in linux package in Ubuntu:
  Triaged

Bug description:
  Description of problem:
  Large sized VMs with 32 VCPUs and more than 100G memory sometimes hang at boot, and the console keeps printing logs like "soft lockup - CPU#14 stuck for 23s!"

  This particular issue can be resolved with the following patch upstream: 
  https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/commit/arch/x86/kernel/cpu?id=88c9281a9fba67636ab26c1fd6afbc78a632374f

  Repro rate is low.  To repro, provision a larger VM (i.e. G5 VM on
  Azure) and reboot many times, monitoring the console until the "soft
  lockup - CPU" error is seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1498206/+subscriptions