Re: ACPI hotplug

[Rajesh Shah <rajesh.shah-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>]

On Thu, Jan 13, 2005 at 03:02:37PM +0100, Paul Ionescu wrote:
> 
> I just read that 2.6.11-rc1 does support ACPI hotplug.
> What does this really mean ?
> I found some new files in /sys/firmware:
> find /sys/firmware/ | grep eject
> /sys/firmware/acpi/namespace/ACPI/_SB/PCI0/USB7/URTH/UPDK/eject
> /sys/firmware/acpi/namespace/ACPI/_SB/PCI0/USB0/URTH/UPDK/eject
> /sys/firmware/acpi/namespace/ACPI/_SB/PCI0/IDE0/SCND/MSTR/eject
> /sys/firmware/acpi/namespace/ACPI/_SB/PCI0/LPC/EC/BAT1/eject
> /sys/firmware/acpi/namespace/ACPI/_SB/PCI0/LPC/FDC/FDD0/eject
> 
The new ACPI code is to  support _physical_ insertion/removal of
cpus and "containers" (nodes) that have cpus and memory. This
requires firmware/platform support.  Linux already supports ACPI
(as well as SHPC/PCI-Express) based physical insertion/removal of
IO adapters independent of the new code in 2.6.11-rc1. The ACPI 
namespace you listed above shows ACPI ejectable IO devices. This
is handled by the existing acpiphp code, not the new processor
or container code.

Rajesh



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