On Tuesday 13 November 2007 02:30:49 pm Greg KH wrote: > On Tue, Nov 13, 2007 at 01:36:45PM -0700, Alex Chiang wrote: > > * Greg KH <greg@xxxxxxxxx>: > > > IBM sells a program that does this for server rooms. It's > > > probably part of some Tivoli package somewhere, sorry I don't > > > remember the name. I did see it working many years ago and it > > > required no kernel changes at all to work properly. Do you know how this Tivoli package works or where it gets the information? > > Like I said in an earlier email, HP ia64 systems will require a > > kernel change to get this information. Whether it comes via a > > generic ACPI access layer like dev_acpi, or something like this > > patch series, the kernel will still get touched. > > And like I said, I'm pretty sure you don't need to touch the kernel > today as there are people doing this just fine from userspace without > any kernel changes needed :) I think you are assuming userspace can just dump the raw ACPI tables and extract this information from them. But I don't think that's possible because _SUN is a method that can contain arbitrary AML. That AML has to be *executed*, and you can't do that safely in userspace. Bjorn - To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
