Messages in this thread | | | Subject | Re: [PATCH 1/4] PM / devfreq: reuse system workqueue machanism | From | Chanwoo Choi <> | Date | Tue, 10 Dec 2019 10:41:27 +0900 |
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On 12/9/19 11:44 PM, Kamil Konieczny wrote: > There is no need for creating another workqueue, it is enough > to reuse system_freezable_power_efficient one. > > Signed-off-by: Kamil Konieczny <k.konieczny@samsung.com> > --- > drivers/devfreq/devfreq.c | 6 +++--- > 1 file changed, 3 insertions(+), 3 deletions(-) > > diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c > index 46a7ff7c2994..955949c6fc1f 100644 > --- a/drivers/devfreq/devfreq.c > +++ b/drivers/devfreq/devfreq.c > @@ -1532,11 +1532,11 @@ static int __init devfreq_init(void) > return PTR_ERR(devfreq_class); > } > > - devfreq_wq = create_freezable_workqueue("devfreq_wq"); > + devfreq_wq = system_freezable_power_efficient_wq;
It affect the behaviors of whole device drivers using devfreq subsystem. It is not good to change the workqueue type without any reasonable data like experiment result, power-consumption result and performance result for almost device drivers using devfreq subsystem.
Are there any problem or any benefit to change workqueue type?
Actually, it is not simple to change the like just one device driver because devfreq subsytem is very important for both performance and power-consumption.
If you hope to change the feature related to both performance and power-consumption, please suggest the reasonable data with fundamental reason.
So, I can't agree it.
> if (!devfreq_wq) { > class_destroy(devfreq_class); > - pr_err("%s: couldn't create workqueue\n", __FILE__); > - return -ENOMEM; > + pr_err("%s: system_freezable_power_efficient_wq isn't initialized\n", __FILE__); > + return -EINVAL; > } > devfreq_class->dev_groups = devfreq_groups; > >
-- Best Regards, Chanwoo Choi Samsung Electronics
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