Comment 1 for bug 1681469

Leann,

Critical bug to add to the Kernel Team's queue.

                   Michael

On 04/10/2017 07:49 AM, Launchpad Bug Tracker wrote:
> bugproxy (bugproxy) has assigned this bug to you for Ubuntu:
>
> == Comment: #0 - Frederic Barrat <email address hidden> -
> 2017-04-10 04:44:01 ==
>
> ---Problem Description---
> Memory corruption can be seen when using a capi adapter. It can happen if the host process allocates/frees/reallocates memory areas used by the the capi adapter.
> Some TLB invalidations may not be propagated to the capi adapter, causing the corruption.
>
> Contact Information = <email address hidden>
>
> ---uname output---
> Linux garri 4.4.0-72-generic #93-Ubuntu SMP Fri Mar 31 14:05:15 UTC 2017 ppc64le ppc64le ppc64le GNU/Linux
>
> ---Additional Hardware Info---
> capi card needed, with the AFU image used by libdonut development
>
>
> Machine Type = Tuleta
>
> ---Debugger---
> A debugger is not configured
>
> ---Steps to Reproduce---
> Run libdonut in a loop, until corruption is seen. Host process will dump core
>
>
> Stack trace output:
> no
>
> Oops output:
> no
>
> System Dump Info:
> The system is not configured to capture a system dump.
>
> *Additional Instructions for <email address hidden>:
> -Attach sysctl -a output output to the bug.
>
> == Comment: #1 - Frederic Barrat <email address hidden> - 2017-04-10 04:45:19 ==
> Fix is already upstream:
>
> commit 88b1bf7268f56887ca88eb09c6fb0f4fc970121a
> Author: Frederic Barrat <email address hidden>
> Date: Wed Mar 29 19:19:42 2017 +0200
>
> powerpc/mm: Add missing global TLB invalidate if cxl is active
>
>
> Could it be backported to the 16.04 LTS release, as well as 17.04?
> Thanks
>
> ** Affects: ubuntu
> Importance: Undecided
> Assignee: Taco Screen team (taco-screen-team)
> Status: New
>
>
> ** Tags: architecture-ppc64le bugnameltc-153279 severity-high targetmilestone-inin16045

--
Michael Hohnbaum
OIL Program Manager
Power (ppc64el) Development Project Manager
Canonical, Ltd.