Re: [RFC][PATCH] avoid cpu hot remove of cpus which have special RTtasks.

[KAMEZAWA Hiroyuki]

On Sat, 17 Jun 2006 17:29:32 +1000
Nick Piggin <nickpiggin@xxxxxxxxxxxx> wrote:

> > As SIGSTOP/KILL patch I posted, the apps shouldn't do unexpected
> > work, I think.
> 
> I don't quite understand you here... the kernel doesn't need to enforce
> anything but a dumb fallback policy where userspace is otherwise capable
> of handling it themselves.

If all things about apps are properly maintained/managed, it is reconfigured
by the user/system admin *before* cpu hotremove.

The case "the kernel have to move the task to other cpu which user doesn't want"
means the application is already broken.

So, I think "stop mis-configurated process" can be one way for handling  such apps.

For example)
After exchanging broken cpu, the application can continue its work with the
same # of cpus.

-Kame

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