Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels on boot cpu

Neil Horman
2007-12-17T11:42:40Z

On Thu, Dec 13, 2007 at 10:32:22AM -0500, Neil Horman wrote:
> On Thu, Dec 13, 2007 at 04:16:29PM +0100, Andi Kleen wrote:
> > On Thu, Dec 13, 2007 at 09:39:22AM -0500, Neil Horman wrote:
> > >
> > > Ok, new patch attached, taking into account Andi's request for a cleaner method
> >
> > Sorry for not noticing that earlier, but was there a specific reason this needs
> > to be an early quirk at all? kexec can only happen after the standard quirks ran.
> > I think it should be fine as a standard "late" quirk.
> >
> > -Andi
> >
> Early quirk seemed like the right thing to do to me. Starting from boot up,
> this (mis)configuration by the bios can mean that come cpus just don't get
> interrupts. I could imagine situations like serial console not working if the
> serial port interrupt was routed to a cpu that used extended APIC id. I've
> never actually observed it happening, but making sure that all cpus were
> eligible to get interrupts early in the boot process made sense to me.
>
> Neil
>

Sorry to push on this, but do we have a consensus on this fix? Andi, do you
still feel this needs to be a late quirk given my previous arguments?

Regards
Neil