Re: [Pcihpd-discuss] [RFC] New sysfs tree for hotplug

[Greg KH <greg@kroah.com>]

On Mon, Apr 26, 2004 at 02:58:08PM +0900, Keiichiro Tokunaga wrote:
> 
> I think it depends on a hotplug driver that is invoked when writing to
> a "eject" file.  In the board case, a board hotplug driver (I'm making) 
> handles those CPUs, memory, and PCI slots on the board.  So my
> story for board hotplug is:
> 
>   - user checks/knows what resources are on the board (dependency)
>   - user writes to the "eject" file of the board properly (invocation)

Why not make a program that does all of this from userspace?  It would
turn off the proper CPUs, memory, and pci slots for a specific "board".
Otherwise you are going to have to either:
	- hook the current CPU, memory, and pci hotplug code to allow it
	  to be called from within the kernel
	- have your kernel code write to a the sysfs files from within
	  kernelspace.

Neither of which are acceptable things :(

thanks,

greg k-h