Re: [PATCH][RFC] freezer : add the TIF_FREEZE flag to all archs

[Cedric Le Goater <clg@fr.ibm.com>]

Kirill Korotaev wrote:
>>> From: Cedric Le Goater <clg@fr.ibm.com>
>>
>> Sorry for the delay, I somehow managed to overlook your message.
>>
>>
>>> This patch is the first step in making the refrigerator() available 
>>> to all architectures, even for those without power management. 
>>>
>>> The purpose of such a change is to be able to use the refrigerator() 
>>> in a new control group subsystem which will implement a control group
>>> freezer.
>>
>> Hm, sounds interesting, but ...
>>  
>>
>>> If you think this is safe and not utterly stupid, I'll send the rest
>>> of the patchset exporting the refrigerator to all arches.
>>
>> ... you will need to provide some details, I think.
>>
>> I also think that it's safe to define TIF_FREEZE for all architectures, but
>> the usefulness of it will very much depend on the purpose. :-)

I'm sending the full patchset, asap

> refrigerator() can be used (and is actually used in OpenVZ containers) to freeze
> container processes for checkpointing (live migration).
> So this can be used regardless system suspend and on all archs.

Exactly !

Thanks,

C.