Public bug reported: Backport the below upstream "powernv-cpufreq" bug fixes to ubuntu 16.04:
The below listed patchset is accepted upstream and is in linux-next. 1) 86622cb8c57abb05fe95bea3a068949c0ca79fc3 cpufreq: powernv: Free 'chips' on module exit 2) 6d167a44e6c8da3316e037b788585fcf96112bea cpufreq: powernv: Hot-plug safe the kworker thread 3) 96c4726f01cdbf53acf74cf2394e287d74bf40a3 cpufreq: powernv: Remove cpu_to_chip_id() from hot-path 4) 0306e481d479a58eff17c27adf213fbb5822946b cpufreq: powernv/tracing: Add powernv_throttle tracepoint 5)c89f2682a39192433c296bf97b834fd2815a758b cpufreq: powernv: Replace pr_info with trace print for throttle event Two more patches that are posted upstream: 6) http://marc.info/?l=linuxppc-embedded&m=145648325218686&w=2 7) http://marc.info/?l=linux-pm&m=145648316718658&w=2 1) Fixes a memory leak 2) Makes the worker thread hot-plug safe which is scheduled on an OCC event. 3) Fixes the below bug which cause 4% cpu overhead by powernv_cpufreq_throttle_check() function. 4.44% [k] _raw_spin_lock_irqsave | |--48.56%-- _raw_spin_lock_irqsave | | | |--72.55%-- of_find_property | | | | | |--62.14%-- of_n_addr_cells | | | __of_find_n_match_cpu_property | | | | | | | |--75.72%-- of_get_cpu_node | | | | cpu_to_chip_id | | | | powernv_cpufreq_throttle_check | | | | powernv_cpufreq_target_index | | | | __cpufreq_driver_target 4) , 5) and 7) are permanent fixes for BZ 131119, BZ 130125 which complained on the throttle message reporting 6) Fixes bug in powernv_cpufreq_{init/exit} ** Affects: ubuntu Importance: Undecided Assignee: Taco Screen team (taco-screen-team) Status: New ** Tags: architecture-ppc64le bugnameltc-137980 severity-high targetmilestone-inin1604 ** Tags added: architecture-ppc64le bugnameltc-137980 severity-high targetmilestone-inin1604 ** Changed in: ubuntu Assignee: (unassigned) => Taco Screen team (taco-screen-team) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1555765 Title: Backport upstream bugfixes to ubuntu-16.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1555765/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
