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[Bug 1441856] [NEW] ISST-LTE:Ubuntu15.04: After migration of Ubuntu15.04 lpar, RMC connection on HMC will be lost (LPM)(kernel/powerpc-ibm-utils)

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From: Launchpad Bug Tracker <1441856@xxxxxxxxxxxxxxxxxx>
Date: Wed, 08 Apr 2015 21:13:32 -0000
Reply-to: Bug 1441856 <1441856@xxxxxxxxxxxxxxxxxx>
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Defect Description:
----------------------------

For Ubuntu15.04 lpar which has Active RMC connection with HMC, once the
lpar is migrated to another machine in same/different HMC, the RMC
connection on HMC with the lpar will be lost.

The following upstream fixes are required to ensure device tree is
properly updated after migration/suspend and that the RMC connection is
not lost as a result.

>From powerpc-utils upstream -next branch:
------------------------------------------------------------------

commit a941cdfb9609bba04c5bad18ab8af1c85b7b6a9b
Author: Tyrel Datwyler <tyreld@xxxxxxxxxxxxxxxxxx>
Date:   Tue Mar 31 18:23:59 2015 -0400

    drmgr: Use sysfs migration store to initiate migration when possible

>From mainline Linux 4.0:
--------------------------------------

commit f6ff04149637723261aa4738958b0098b929ee9e
Author: Tyrel Datwyler <tyreld@xxxxxxxxxxxxxxxxxx>
Date:   Wed Mar 4 11:59:33 2015 -0800

    powerpc/pseries: Little endian fixes for post mobility device tree
update

>From mpe's PowerPC -next branch:
-----------------------------------------------------

commit 288a298c05774dde0a8d5abac9b692503d4e41f2
Author: Tyrel Datwyler <tyreld@xxxxxxxxxxxxxxxxxx>
Date:   Wed Mar 4 18:25:38 2015 -0800

    powerpc/pseries: Introduce api_version to migration sysfs interface

commit c03e73740d24fbe990291cd9ac2d6ae0d95b975f
Author: Tyrel Datwyler <tyreld@xxxxxxxxxxxxxxxxxx>
Date:   Fri Mar 27 12:47:25 2015 -0700

    powerpc/pseries: Simplify check for suspendability during
suspend/migration


I have verified LPM after installing test packages containing the mentioned patches and now LPM works fine for me.

** Affects: linux (Ubuntu)
     Importance: Undecided
     Assignee: Taco Screen team (taco-screen-team)
         Status: New


** Tags: architecture-ppc64le bugnameltc-123457 severity-critical targetmilestone-inin1504
-- 
ISST-LTE:Ubuntu15.04: After migration of Ubuntu15.04 lpar, RMC connection on HMC will be lost (LPM)(kernel/powerpc-ibm-utils)
https://bugs.launchpad.net/bugs/1441856
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