Re: [RFD] Freezing of kernel threads

From: Rafael J. Wysocki
Date: Sun May 13 2007 - 17:09:51 EST


On Sunday, 13 May 2007 22:49, Linus Torvalds wrote:
>
> On Sun, 13 May 2007, Rafael J. Wysocki wrote:
> >
> > Besides, the problems with interdependencies that we've had recently are
> > related specifically to the CPU hotplug. To be precise, they are related to the
> > CPU hotplug notifiers that try to stop kernel threads which may be frozen.
> > The other interdependencies don't lead to freezer-related problems.
>
> Sure they do. We've always had interdependencies and freezer-related
> problems. That's why PF_NOFREEZE exists in the first place.

Okay, we've already discussed that. I was referring to the recent problems
and I should have added "at present" to the last sentence. :-)

> Claiming this is somehow CPU hotplug-related is disingenious, since the
> freezer hasn't even been used for that historically, yet clearly we *do*
> have the NOFREEZE stuff.
>
> Those kernel threads tend to exists for a reason.

Agreed.

Greetings,
Rafael
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