Re: [PATCH 2/2] ACPI: add DMI info to enable OSI(Linux) on PRIMEQUEST

KAMEZAWA Hiroyuki
2008-05-27T01:07:54Z

On Mon, 26 May 2008 10:06:14 +0200
Pavel Machek <pavel@suse.cz> wrote:

> On Mon 2008-05-26 16:56:05, Taku Izumi wrote:
> >
> > Thank you for your response.
> >
> >>> This patch adds DMI info to enable OSI(Linux) on PRIMEQUEST.
> >>> (PRIMEQUEST is ia64 machine.)
> >>
> >> Why is it needed? Why needs your bios know whether it is Linux or BSD
> >> or whatver running?
> >
> > For memory hotplug support.
> > Memory hotplug doesn't work on PRIMEQUEST when OSI(Linux) is disabled.
>
> So fix the BIOS: there's no reason why memory hotplug should not work
> on BSD or Windows...
> Pavel
IIRC, PrimeQuest doesn't support BSD ;)

It's not really for memory hotplug. The result of _OSI method (TOOS) is
used for PCI, EC driver's behavior, etc.. (on my box)

BTW, PrimeQuest's firmware is designed in 2.6.18 age and _heavily_ tested under
_OSI("Linux") environments. So, the acpi layer which returns _OSI("Linux")
is valid for PrimeQuest. I don't hear a major firmware update for
already-sold-hosts is scheduled.

Thanks,
-Kame