Re: [BUG] cpu-hotplug: Can't offline the CPU with naughty realtime processes

[Gautham R Shenoy <ego@in.ibm.com>]

On Wed, May 09, 2007 at 10:47:50AM +1000, Nick Piggin wrote:
> 
> We've seen the same problem with other stop_machine_run sites in the kernel.
> module remove was one.
> 
> Reserving the top priority slot for stop machine (and migration thread, I
> guess) isn't a bad idea.

I second this thought.
The process freezer, if used will only safeguard cpu-hotplug, but not other
sites which use stop_machine_run.

> 
> -- 
> SUSE Labs, Novell Inc.

Regards
gautham.
-- 
Gautham R Shenoy
Linux Technology Center
IBM India.
"Freedom comes with a price tag of responsibility, which is still a bargain,
because Freedom is priceless!"
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