Re: current linux-2.6.git: cpusets completely broken

[Linus Torvalds]

On Mon, 14 Jul 2008, Steven Rostedt wrote:
> 
> Oh, I'm not arguing. My mind is going off to an even bigger picture, where
> something in the future would need to stop migration to a particular CPU,
> and that it could simply clear the bit and call synchronize_sched. The run
> queue lock is only visible to the scheduler.  Sorry, I may have been day
> dreaming out loud ;-)

Well, you'd be stuck right now anyway. 

At least in my trivial patch, the cpu_active_map locking is protected by 
'cpu_add_remove_lock' which is static to cpu.c. The only thing that 
modifies it (apart from the initial setup before SMP has been brought up) 
is the hotplug code.

			Linus
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