linux-kernel - Re: 4.8.2 not booting in 32-bit VM without I/O-APIC

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Date:   Thu, 10 Nov 2016 18:18:29 +0100 (CET)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Michael Thayer <michael.thayer@...cle.com>
cc:     Michal Necasek <michal.necasek@...cle.com>, prarit@...hat.com,
        ville.syrjala@...ux.intel.com, frank.mehnert@...cle.com,
        knut.osmundsen@...cle.com, linux-kernel@...r.kernel.org
Subject: Re: 4.8.2 not booting in 32-bit VM without I/O-APIC

On Thu, 10 Nov 2016, Michael Thayer wrote:
> On 03.11.2016 21:02, Michal Necasek wrote:
> > Sorry for the delay. I can confirm that the problem is fixed in
> > 4.9.0-rc3 and prefill_possible_map no longer crashes (as it did in
> > 4.9.0-rc2). Thank you!
> > 
> > Just a side question, is the previous fix in commit ff8560512b
> > (x86/boot/smp: Don't try to poke disabled/non-existent APIC) actually
> > still required or would the no-op APIC driver take care of it?
> 
> Sorry for the delay too (holiday-related).  I tested 4.9.0rc4 on a 32-bit

No problem. I hope you enjoyed your well earned vacation :)

> VirtualBox virtual machine without I/O-APIC and can confirm that it now boots.
> Since I am at it, the OHCI timer wheel-related problems are also no longer
> reproducible.

Thanks for reporting back!

       tglx