group.of.nepali.translators team mailing list archive

[Thadeu Lima de Souza Cascardo <1983030@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

[Impact]
4.4 kernels will fail to boot on AWS instance types m6a and c6a.

[Test case]
Boot kernels on those instance types.

[Fix]
Flushes TLB global mappings when system is not affected by Meltdown.

[Potential regression]
Missing TLB flushes may lead to security vulnerabilities. Unneeded TLB flushes lead to performance impact.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Fix Released

** Affects: linux (Ubuntu Xenial)
     Importance: Medium
     Assignee: Thadeu Lima de Souza Cascardo (cascardo)
         Status: In Progress

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

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

** Changed in: linux (Ubuntu Xenial)
     Assignee: (unassigned) => Thadeu Lima de Souza Cascardo (cascardo)

** Changed in: linux (Ubuntu Xenial)
       Status: New => In Progress

** Changed in: linux (Ubuntu)
       Status: New => Fix Released

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https://bugs.launchpad.net/bugs/1983030

Title:
  Kernel fails to boot on some AMD systems

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  In Progress

Bug description:
  [Impact]
  4.4 kernels will fail to boot on AWS instance types m6a and c6a.

  [Test case]
  Boot kernels on those instance types.

  [Fix]
  Flushes TLB global mappings when system is not affected by Meltdown.

  [Potential regression]
  Missing TLB flushes may lead to security vulnerabilities. Unneeded TLB flushes lead to performance impact.

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