group.of.nepali.translators team mailing list archive

Thread
Date

[Bug 1715489] Re: [Hyper-V] Read TSC frequency from a synthetic MSR

To: group.of.nepali.translators@xxxxxxxxxxxxxxxxxxx
From: Kamal Mostafa <kamal@xxxxxxxxxxxxx>
Date: Thu, 07 Sep 2017 18:48:41 -0000
Reply-to: Bug 1715489 <1715489@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

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

** Also affects: linux-azure (Ubuntu Xenial)
   Importance: Undecided
       Status: New

-- 
You received this bug notification because you are a member of नेपाली
भाषा समायोजकहरुको समूह, which is subscribed to Xenial.
Matching subscriptions: Ubuntu 16.04 Bugs
https://bugs.launchpad.net/bugs/1715489

Title:
  [Hyper-V] Read TSC frequency from a synthetic MSR

Status in linux package in Ubuntu:
  Confirmed
Status in linux-azure package in Ubuntu:
  In Progress
Status in linux source package in Xenial:
  New
Status in linux-azure source package in Xenial:
  New

Bug description:
  It was found that SMI_TRESHOLD of 50000 is not enough for Hyper-V
  guests in nested environment and falling back to counting jiffies
  is not an option for Gen2 guests as they don't have PIT. As Hyper-V
  provides TSC frequency in a synthetic MSR we can just use this information
  instead of doing a error prone calibration.

  Upstream commit here:
  https://github.com/torvalds/linux/commit/71c2a2d0a81f096a2932fccb39a500116fece554

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1715489/+subscriptions