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== Comment: #0 - Frederic Barrat <frederic.bar...@fr.ibm.com> -
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 = frederic.bar...@fr.ibm.com 
 
---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 frederic.bar...@fr.ibm.com: 
-Attach sysctl -a output output to the bug.

== Comment: #1 - Frederic Barrat <frederic.bar...@fr.ibm.com> - 2017-04-10 
04:45:19 ==
Fix is already upstream:

commit 88b1bf7268f56887ca88eb09c6fb0f4fc970121a
Author: Frederic Barrat <fbar...@linux.vnet.ibm.com>
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: linux (Ubuntu)
     Importance: Undecided
     Assignee: Taco Screen team (taco-screen-team)
         Status: New


** Tags: architecture-ppc64le bugnameltc-153279 severity-high 
targetmilestone-inin16045
-- 
Potential memory corruption with capi adapters
https://bugs.launchpad.net/bugs/1681469
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