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

From: Keiichiro Tokunaga
Date: Fri Apr 23 2004 - 08:55:04 EST

On Fri, 23 Apr 2004 13:30:57 +0100
Matthew Wilcox <willy@xxxxxxxxxx> wrote:

> On Fri, Apr 23, 2004 at 09:18:16PM +0900, Keiichiro Tokunaga wrote:
> > That's right. /sys/devices/hotplug/ACPI/ tree becomes hard-wired one. I was
> > thinking to define the board by using ACPI (as a "generic container device" in
> > ACPI namespace). Therefore, if there is the new tree I proposed in the kernel,
> > it would be easy to represent the hierarchy, and a directory for the board
> > appears in the new tree. So I thought that we could put an control file to
> > invoke the board hotplug and an information file under the directory.
> > (Actually, I've made a rough patch for the new tree and it seems to work fine:)
> > I also thought that interface for hotplug could be unified so that it would become
> > easier for user to use.
> Have you seen Alex Williamson's patch to fill out the /sys/firmware/acpi tree?

Yes, I have. I understand he's trying to expose objects and control methods
under /sys/firmware/acpi/namespace/ACPI/ tree and user can access it. Actually,
I'm interested in hotplug part he mentioned and wondering if it's possible to
run _EJ0 method without any hotplug processing. That's what I know so far,
since I didn't know he has already relased the new patch. Thanks for the
information, I'll take a look at that :)

I'm sorry for the crossposting. I just wanted to hear from every hotplug related
people as possible... Now I'm sending this to you and lkml.

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at