Re: [Bug #15124] PCI host bridge windows ignored (works with pci=use_crs)

Bjorn Helgaas
2010-01-28T16:09:44Z

On Wednesday 27 January 2010 10:53:51 pm Yinghai Lu wrote:
> On 01/27/2010 08:26 PM, Bjorn Helgaas wrote:
> > On Wed, 2010-01-27 at 15:34 -0800, Yinghai Lu wrote:

> >> 2. how about when apci is disabled?
> >
> > When ACPI is disabled, I think we just have to accept that we lose some
> > functionality. I don't see the need for alternate ways to accomplish
> > everything that ACPI does. It's becoming less and less useful to
> > disable ACPI; I think it's only interesting as a debugging tool, and
> > even then it's a sledgehammer.
>
> some systems when acpi is enabled could have interrupt storm.
> and have to disable acpi.

We should fix that problem rather than just covering it up by
disabling ACPI. Can you provide any details?

I think it's crazy to add code to work around Problem B that only
occurs because we disabled ACPI to work around Problem A. We should
just fix Problem A instead.

Bjorn