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| author | Joao Martins <joao.m.martins@oracle.com> | 2019-09-08 01:45:22 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2019-09-11 17:36:30 +0200 |
| commit | 7321440829a27d58c88b7fcfcbbc37487b5e39a5 (patch) | |
| tree | 72bdacfa727c89b79feca82868b45177d2b86361 /drivers/cpuidle | |
| parent | cpuidle: allow governor switch on cpuidle_register_driver() (diff) | |
| download | linux-7321440829a27d58c88b7fcfcbbc37487b5e39a5.tar.xz linux-7321440829a27d58c88b7fcfcbbc37487b5e39a5.zip | |
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 'drivers/cpuidle')
| -rw-r--r-- | drivers/cpuidle/cpuidle-haltpoll.c | 1 | ||||
| -rw-r--r-- | drivers/cpuidle/governors/haltpoll.c | 2 |
2 files changed, 2 insertions, 1 deletions
diff --git a/drivers/cpuidle/cpuidle-haltpoll.c b/drivers/cpuidle/cpuidle-haltpoll.c index 56d8ab814466..519e90d125cf 100644 --- a/drivers/cpuidle/cpuidle-haltpoll.c +++ b/drivers/cpuidle/cpuidle-haltpoll.c @@ -34,6 +34,7 @@ static int default_enter_idle(struct cpuidle_device *dev, static struct cpuidle_driver haltpoll_driver = { .name = "haltpoll", + .governor = "haltpoll", .owner = THIS_MODULE, .states = { { /* entry 0 is for polling */ }, diff --git a/drivers/cpuidle/governors/haltpoll.c b/drivers/cpuidle/governors/haltpoll.c index 797477bda486..7a703d2e0064 100644 --- a/drivers/cpuidle/governors/haltpoll.c +++ b/drivers/cpuidle/governors/haltpoll.c @@ -133,7 +133,7 @@ static int haltpoll_enable_device(struct cpuidle_driver *drv, static struct cpuidle_governor haltpoll_governor = { .name = "haltpoll", - .rating = 21, + .rating = 9, .enable = haltpoll_enable_device, .select = haltpoll_select, .reflect = haltpoll_reflect, |