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This is a feature request to include the following patches in 15.04
kernel.

[1] 92c83ff5b42b109  cpuidle/powernv: Read target_residency value of idle states from DT if available
[2] 70734a786acfd1   driver/cpuidle-powernv: Avoid endianness conversions while parsing DT
[3] tick/broadcast-hrtimer : Fix suspicious RCU usage in idle loop
https://lkml.org/lkml/2015/3/18/185
[4] tick/hotplug: Handover time related duties before cpu offline
https://patchwork.ozlabs.org/patch/435097/

[1] and [2] patches provide fixes to read the latency and
target_residency values of different idle states from the device tree if
they are present in the device tree. This fix will avoid cpu from
aggressively  entering into fastsleep.

[3] and [4] are important fixes against a kernel regression, cpu offline
bug down the cpuidle path which was reported in the community


Thanks for the new bug. I understand that patches [2] and [3] are not accepted upstream yet, right?

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: architecture-ppc64le bugnameltc-123005 severity-high targetmilestone-inin1504
-- 
Add cpuidle-powernv upstream bug fixes to fix kernel regression due to cpuidle in 15.04 kernel
https://bugs.launchpad.net/bugs/1435951
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