diff options
| author | Joao Martins <joao.m.martins@oracle.com> | 2019-09-07 19:45:22 -0400 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2019-09-11 11:36:30 -0400 |
| commit | 7321440829a27d58c88b7fcfcbbc37487b5e39a5 (patch) | |
| tree | 72bdacfa727c89b79feca82868b45177d2b86361 /Documentation/DMA-ISA-LPC.txt | |
| parent | cb5d8c45ab6c3daf8269e550cfb2d5018a876fe3 (diff) | |
cpuidle-haltpoll: set haltpoll as preferred governor
Right now, guest current governors have the following ratings:
* ladder -> 10
* teo -> 19
* menu -> 20
* haltpoll -> 21
* ladder + nohz=off -> 25
haltpoll governor got introduced and it is now the default governor given
its highest rating -- with ladder+nohz being the exception -- regardless of
idle driver in the guest. An example of an undesirable case is x86 KVM
guests with MWAIT which have intel_idle registered first, and consequently
will have haltpoll be used as governor which would get limited to a poll
state and state 1 and the other states wouldn't get used.
To keep the previous defaults we decrease rating of governor to 9 (below
current lowest rating) and thus rely on @governor switch on
cpuidle_register_driver() to tie in haltpoll idle driver and governor
together.
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'Documentation/DMA-ISA-LPC.txt')
0 files changed, 0 insertions, 0 deletions