** Changed in: linux (Ubuntu)
Importance: Undecided => High
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Andy Whitcroft (apw)
** Changed in: linux (Ubuntu)
Milestone: None => ubuntu-15.03
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https://bugs.launchpad.net/bugs/1435951
Title:
Add cpuidle-powernv upstream bug fixes to fix kernel regression due to
cpuidle in 15.04 kernel
Status in linux package in Ubuntu:
Confirmed
Bug description:
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?
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