[v3,0/4] cpuidle, haltpoll: governor switching on idle register
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Message ID 20190907234524.5577-1-joao.m.martins@oracle.com
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  • cpuidle, haltpoll: governor switching on idle register
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Joao Martins Sept. 7, 2019, 11:45 p.m. UTC
Hey,

Presented herewith a series with aims to tie in together the haltpoll
idle driver and governor, without sacrificing previous governor setups.
In addition, there are a few fixes with respect to module loading for
cpuidle-haltpoll. 

The series is organized as follows:

 Patch 1: Allows idle driver stating a preferred governor that it
          wants to use, based on discussion here:

  https://lore.kernel.org/kvm/457e8ca1-beb3-ca39-b257-e7bc6bb35d4d@oracle.com/

 Patch 2: Decrease rating of governor, and allows previous defaults
	  to be as before haltpoll, while using @governor to switch to haltpoll
	  when haltpoll driver is registered;

 Patch 3 - 4: Module loading fixes. first is the incorrect error
	      reporting and second is supportting module unloading.

Thanks,
	Joao

v3:
* Fixed ARM build issues.

v2:
* Add missing Fixes tag on patches 3 and 4.

Joao Martins (4):
  cpuidle: allow governor switch on cpuidle_register_driver()
  cpuidle-haltpoll: set haltpoll as preferred governor
  cpuidle-haltpoll: return -ENODEV on modinit failure
  cpuidle-haltpoll: do not set an owner to allow modunload

 drivers/cpuidle/cpuidle-haltpoll.c   |  4 ++--
 drivers/cpuidle/cpuidle.h            |  2 ++
 drivers/cpuidle/driver.c             | 25 +++++++++++++++++++++++++
 drivers/cpuidle/governor.c           |  7 ++++---
 drivers/cpuidle/governors/haltpoll.c |  2 +-
 include/linux/cpuidle.h              |  3 +++
 6 files changed, 37 insertions(+), 6 deletions(-)