linux-kernel - Re: [PATCH] x86/apic: Remove logical destination mode for 64-bit

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Message-ID: <d9cbe524-ad83-4c48-b6f4-3376ff3172d4@heusel.eu>
Date: Thu, 5 Sep 2024 15:28:47 +0200
From: Christian Heusel <christian@...sel.eu>
To: Thomas Gleixner <tglx@...utronix.de>
Cc: Rob <rob@...endal.co.uk>, Borislav Petkov <bp@...en8.de>, 
	regressions@...ts.linux.dev, x86@...nel.org, Joerg Roedel <joro@...tes.org>, 
	Tony Luck <tony.luck@...el.com>, LKML <linux-kernel@...r.kernel.org>, 
	Paul Menzel <pmenzel@...gen.mpg.de>, Lyude Paul <lyude@...hat.com>
Subject: Re: [PATCH] x86/apic: Remove logical destination mode for 64-bit

On 24/08/09 02:18PM, Thomas Gleixner wrote:
> On Fri, Aug 09 2024 at 11:37, Christian Heusel wrote:
> > On 24/07/28 05:51PM, Rob wrote:
> >> * Thomas Gleixner (tglx@...utronix.de) wrote:
> >> > As the number of CPUs keeps increasing, logical destination mode becomes a
> >> > less used code path so there is no real good reason to keep it around.
> >> > 
> >> > Therefore remove logical destination mode support for 64-bit and default to
> >> > physical destination mode.
> >> 
> >> Thanks Chris for applying the patch for me.
> >> 
> >> Thomas - The patched kernel boots successfully.  I held off updating the
> >> BIOS so there can be no ambiguity.
> >> 
> >> Thanks,
> >> 
> >> Rob
> >
> > As far as I can tell this patch did not get applied anywhere so far,
> > right? Or did I miss anything?
> 
> I forgot about it. Let me find it again and stick it into the tip tree.

I think the patch did not make it past the tip tree after that if I
checked correctly.

Now since it's summer people are maybe on vacation and I hope it got
stuck there because of cocktails on the beach and so on 😆🍹

In any case I wanted to send a reminder about it ..

Cheers,
Chris

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