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[Bug 1350375] Re: DomU crach on xen <3.2 due to NMI call

To: kernel-packages@xxxxxxxxxxxxxxxxxxx
From: Brad Figg <brad.figg@xxxxxxxxxxxxx>
Date: Wed, 30 Jul 2014 14:30:06 -0000
Reply-to: Bug 1350375 <1350375@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

** Package changed: linux-meta (Ubuntu) => linux (Ubuntu)

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https://bugs.launchpad.net/bugs/1350375

Title:
  DomU crach on xen <3.2 due to NMI call

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  Request from Amazon:

  Our engineering team has reported that the kernel in 14.04 LTS is
  making a call to NMI which in turn causes DomU instances to crash
  under Xen <3.2. This affects only a particular range of kernel
  versions from 3.12.25 to 3.15.6, and the kernel in 14.04 seems to be
  3.14.x. There is already a patch in the mainstream kernel version to
  apply that would address the situation. The probability of a DomU
  crash with the current ubuntu 14.04 kernel on a Dom0 running Xen <3.2
  is always. Our customers sometimes run on instance types that route
  them to >3.2 Xen so this does not impact all customers.

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