> I looked at my version of acpi (20060707) downloaded from the Intel website.
>
> The dsdt doesnot have the _EJ0 method. Do I write it myself? Is there
> an example
> of how to do that?
In this example, Memory device is defined like followings.
Device(MEM1) {
Name(_HID,EISAID("PNP0C80"))
Name(_UID, 0)
Name (L1st,0)
Method(_PXM) {
return (0x0)
}
Method(_STA,0,NotSerialized) {
If ( LEqual(L1st,1) ) {
Return (0x0f)
} else {
Return (0x00)
}
}
Method(_PS0, 0, NotSerialized) {
Store(1,L1st)
}
:
So, _EJ0 should be written under this memory device.
Method(_EJ0, 0, NotSerialized) {
Store(0,L1st);
}
You have to write appropriate DSDT for your machine by yourself.
Please check ACPI's specification.
> What other code inside the linux kernel is required to
> implement the hot remove? I am using kernel version 2.6.17.
IIRC, Basically, followings are necessary yet.
- Avoid new allocation of pages which belongs removing area.
(This is implemented once as capture_page in Dave-san's patch set.
See: http://sr71.net/patches/2.6.14/2.6.14-rc2-git8-mhp1/)
- Grouping memory area between reclaimable memory and
hard-reclaim memory. Kernel memory is usually hard-reclaim.
If a page is used by kernel, all of its area is hard to remove.
So, kernel must organize removable memory chunk as contiguous pages
of?reclaimable memory' to remove it.
Bye.
--
Yasunori Goto
