Re: Latest tip kernel(3.2-rc1-tip_cf6b3899) fails to boot on x3850x5 machine

[Suresh Siddha <suresh.b.siddha@intel.com>]

On Fri, 2011-12-16 at 10:03 -0800, Yinghai Lu wrote:
> On Fri, Dec 16, 2011 at 12:40 AM, Ingo Molnar <mingo@elte.hu> wrote:
> 
> > IRQ_REMAP is a 'complex' option:
> >
> > config IRQ_REMAP
> >        bool "Support for Interrupt Remapping (EXPERIMENTAL)"
> >        depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI && EXPERIMENTAL
> >        select DMAR_TABLE
> >
> > and selecting such complex options is generally dangerous, as
> > the sub-dependencies are not explicitly selected. So if say
> > PCI_MSI or ACPI are disabled, the select will still be performed
> > by X86_X2APIC.
> >
> > Can we make the IRQ_REMAP default depend on X86_X2APIC or so, to
> > solve this problem?
> 
> but user could use IRQ_REMAP without x2apic.

Ingo's recommendation is for the default value. We can have multiple
default conditions and the user can always override.

So I am ok with Ingo's suggestion.

> BTW:
> Suresh, can we remove EXPERIMENTAL for IRQ_REMAP now?

Like Google products, beta for a long time ;)

Seriously, we can plan to remove this experimental in the next release.

thanks,
suresh