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[Bug 1352640] Comment bridged from LTC Bugzilla


------- Comment From hellerda@xxxxxxxxxx 2014-08-05 15:21 EDT-------
(In reply to comment #5)
> This bug is missing log files that will aid in diagnosing the problem...
However... there are no applicable log files in this case.  The request is for Ubuntu to pick up the referenced kernel patch.

Let me know if further info is required.  Otherwise please remove the
"incomplete" tag.  Thx.

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  Huge PCI BAR support needed for Ubuntu 14.10

Status in “linux” package in Ubuntu:

Bug description:
  == Comment: #0 - Brian Hart <hartb@xxxxxxxxxx> - 2014-08-04 17:26:34 ==
  ---Problem Description---
  Our project requires Huge BAR Support (i.e. support for PCI BAR spaces > 1G) in Ubuntu 14.10.  Guo and Gavin are working on the kernel changes (and Sapphire/OPAL changes?) and have already submitted patches.  The patches did not make the 3.16 cut-off, so will need to be back-ported to the 14.10 kernel.

  I believe the patches are the set described by:

  Contact Information = Brian Hart (hartb@xxxxxxxxxx), Dave Marquardt (davemarq@xxxxxxxxxx) 
  ---uname output---
  Linux tul115p1 3.16.0-6-generic #11-Ubuntu SMP Mon Jul 28 02:00:45 UTC 2014 ppc64le ppc64le ppc64le GNU/Linux
  ---Additional Hardware Info---
  Problem is seen with PCI adapters that request > 1G of BAR space.  We've seen it with GPUs that request a BAR1 of size 16G. 

  Machine Type = 8286-42A 
  A debugger is not configured
  ---Steps to Reproduce---
   Add a PCI adapter which requests huge BAR space in the system.  The huge BARs will not be assigned and the adapter will likely not initialize.
  Stack trace output:
  Oops output:
  System Dump Info:
    The system is not configured to capture a system dump.
  *Additional Instructions for Brian Hart (hartb@xxxxxxxxxx), Dave Marquardt (davemarq@xxxxxxxxxx): 
  -Attach sysctl -a output output to the bug.

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