Re: Fwd: Kernel Power management ?? turning off used devices thatare in use.

[Joel Schopp]

> I need to be able to either switch off cpu hotpluging - or at least 
> prevent hotplugging certain cpu's
>
> there should really be a mincpu's option or better a 
> nohotplug="0,1,2,5,7,etc" option.
>
> It would appear that cpu1 is the default cpu for those interrupts - 
> and they are not being transferred to cpu0 properly.
The proper way to fix this is to find why the interrupts are not being 
transferred and fix that.  Forcing cpus to not be hotpluggable is just 
hiding the problem.

> I have tried the kernel parameters noapic nosmp maxcpus acpi=off 
> possible_cpus=2 etc - with no success
>
> I did find a flaw in "possible_cpus=0" - this prevents the kernel 
> booting (no cpus available )
> This option should be set to a minimum of 1
We allow users to shoot themselves in the foot if they do silly things.  
This is a design decision.

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