[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Xen-devel] RE: [PATCH 1/2] Vcpu hotplug: Move ACPI processor from \_PR to \_SB


  • To: "Jiang, Yunhong" <yunhong.jiang@xxxxxxxxx>, "Liu, Jinsong" <jinsong.liu@xxxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
  • Date: Fri, 12 Feb 2010 08:30:10 +0000
  • Cc:
  • Delivery-date: Fri, 12 Feb 2010 00:31:00 -0800
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AcqrQRdRK42tFnx6Rbij20ZBPcBQRQACAINSAA4+mEAADuDBxw==
  • Thread-topic: [Xen-devel] RE: [PATCH 1/2] Vcpu hotplug: Move ACPI processor from \_PR to \_SB

On 12/02/2010 02:57, "Jiang, Yunhong" <yunhong.jiang@xxxxxxxxx> wrote:

> However, according to ACPI spec, the _PR is for ACPI1.0 compatible. We have no
> idea which OS is ACPI 1.0 OS. As HeQing found ACPI 1.0 bugs in Win2K, so we
> assume W2K is ACPI 1.0. We test shows W2K guest is ok with the _SB definition
> in our testing. Maybe Win98/WinMe is ACPI 1.0, but we have no image for these
> OS. But yes, that's a main issue for _SB method and we need more consideration
> here.
> 
> In fact, we have internal argue to choose _PR or _SB method before Jinsong's
> initial patch sent out. Later _PR method is chosen because of the ACPI 1.0
> compatible benifit, and kernel 30 version is ok. (IIRC, .32 kernel is not
> released at that time).

Well, that's tricky. 2.6.32 is supposed to be a long-term maintained kernel,
so presumably there will be a 2.6.32.x along in the not-too-far future which
fixes this Linux bug? I feel we're a bit close to the wire to make this
change now.

I'd be a bit more comfortable if we had the cover of lots of other modern
systems putting their processor objects under \_SB, but actually I've never
seen one. Then again I haven't been looking at high-end systems supporting
CPU hotplug and the like.

 -- Keir



_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel


 


Rackspace

Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.