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[Bug 1488426] Re: High CPU usage of kworker/ksoftirqd

 

The above working patch has been merged in linux-4.1.y branch of linux-
stable repository as can been seen here:
https://git.kernel.org/cgit/linux/kernel/git/stable/linux-
stable.git/log/?qt=grep&q=mmc%3A+core%3A+Enable+runtime+PM+management+of+host+devices&h=linux-4.1.y

Since Ubuntu 15.10 comes with Kernel version 4.2, I guess using Ubuntu
15.10 would fix the issue. I would wait for 14.04.4 to come out in Feb
2016 with updated kernel as depicted here:
https://wiki.ubuntu.com/Kernel/LTSEnablementStack#Kernel.2BAC8-Support.A14.04.x_Ubuntu_Kernel_Support

And then upgrade to Ubuntu 16.04 LTS.

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https://bugs.launchpad.net/bugs/1488426

Title:
  High CPU usage of kworker/ksoftirqd

Status in HWE Next:
  New
Status in linux package in Ubuntu:
  In Progress

Bug description:
  kworker consuming 71.5% cpu resource
  ksoftirqd consuming 28.9% cpu resource

  It leads to power consumption issue and sometimes leads to BT does not
  work.

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References