Dear Goto-san, 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? What other code inside the linux kernel is required to implement the hot remove? I am using kernel version 2.6.17. Thanks Bithika Quoting Yasunori Goto <y-goto at jp.fujitsu.com>: > Hello. > >> The test case specified in >> http://lists.osdl.org/pipermail/hotplug_sig/2006-June/000614.html >> >> shows how to add 1GB of memory to the kernel that has been booted >> with just 2 GB >> memory. >> >> 1. Is it possible to specify the *STARTING ADDRESS* of the memory to >> be added in >> addition to the *SIZE*. > > Yes. _CRS method of ACPI'S DSDT can return address and size. > In this example, This is written in "2. Write Memory object" > > Method(_CRS) { > Name(RT0,ResourceTemplate() { > : > 0x100000000, <- start address > 0x13fffffff, > 0, > 0x40000000, <- size > : > } > >> This emulates memory hot add in hardware when I >> physically plug-in memory DIMM into a particular DIMM slot. > > Yes. > >> 2. Is the same feature available to emulate hot remove of memory DIMMS? > > ACPI has the _EJ0 method. If it is described for DIMM's for DSDT, > it should be called after completion of memory remove by OS. > > Thanks. > > -- > Yasunori Goto
