Re: So, what's the status on the recent patches here?

Matthew Locke
2006-09-11T18:58:01Z

On Sep 11, 2006, at 8:11 AM, David Singleton wrote:

> On 9/9/06, Pavel Machek <pavel@ucw.cz> wrote:
>> On Fri 08-09-06 17:39:52, David Singleton wrote:
>>> On 9/3/06, Pavel Machek <pavel@ucw.cz> wrote:
>>>>> And those same steps are the same steps required to transition the
>>>>> system to a new operating point, whether it's suspend or change
>>>>> from 1.4GHz to 600MHz.
>>>>
>>>> No, processes are not frozen for simple cpu frequency change -- on
>>>> non-broken cpus.
>>>
>>> I didn't say cpu frequency changes freeze processes. I said a
>>> suspend
>>> does a prepare to suspend step (which freezes processes) and a cpu
>>> frequency
>>> change does a prepare to change frequency step (where it will run
>>> the driver
>>> notifier list to get drivers set to scale).
>>
>> Yep, and switching consoles is also same. It is prepare to switch, do
>> a switch, notify people you switched. Shall we use same code?
>
> No. Since switching console is not dealing with changing the operating
> state of the system. It's just switching which device is the console.
>
>>
>>> They both do the same three steps:
>>>
>>> 1) prepare to transition
>>>
>>> 2) transition
>>>
>>> 3) finish transition
>>>
>>> That's one of my arguements as to why suspend states should be
>>> treated
>>> just like frequency states.
>>
>> Cat and horse is a same animal. They both have 4 legs, one head and a
>> tail.
>>
>> Anyway, as a software suspend maintainer, I do not want you to add
>> non-sleeping states to /sys/power/state. I will NAK any attempt to do
>> so. Please find more suitable interface.
>
> You are right. The power/state files for devices are for suspend
> states as well. I'll find a different interface for operating states
> and
> leave suspend states in /sys/power/state.

You are just duplicating work that is already done in powerOP. I still
don't understand why you are redoing all the work Eugeny and I have
done. Nothing in our PowerOP interface prevents you from building on
top achieve your goals.

>
> David
>>
>> Pavel
>> --
>> Thanks for all the (sleeping) penguins.
>>
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