Currenly haltpoll isn't aware of the 'idle=' override, the priority is 'idle=poll' > haltpoll > 'idle=halt'. When 'idle=poll' is used, cpuidle driver is bypassed but current_driver in sys still shows 'haltpoll'.
When 'idle=halt' is used, haltpoll take precedence and make 'idle=halt' no effect. Add a check to not load haltpoll driver if there is 'idle=' and haltpoll is built in. If haltpoll is built as a module, still give a chance for admin to use it despite 'idle='. Signed-off-by: Zhenzhong Duan <zhenzhong.d...@oracle.com> Signed-off-by: Joao Martins <joao.m.mart...@oracle.com> --- drivers/cpuidle/cpuidle-haltpoll.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/cpuidle/cpuidle-haltpoll.c b/drivers/cpuidle/cpuidle-haltpoll.c index 932390b..00e9821 100644 --- a/drivers/cpuidle/cpuidle-haltpoll.c +++ b/drivers/cpuidle/cpuidle-haltpoll.c @@ -95,6 +95,12 @@ static int __init haltpoll_init(void) int ret; struct cpuidle_driver *drv = &haltpoll_driver; +#if !defined(CONFIG_HALTPOLL_CPUIDLE_MODULE) + /* Do not load haltpoll if idle= is passed */ + if (boot_option_idle_override != IDLE_NO_OVERRIDE) + return -ENODEV; +#endif + cpuidle_poll_state_init(drv); if (!kvm_para_available() || -- 1.8.3.1