linux-kernel - Re: [x86-tip] RSDP changes converted i4790 box SMP -> UP

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Date:   Fri, 12 Jan 2018 14:11:44 +0100
From:   Ingo Molnar <mingo@...nel.org>
To:     Mike Galbraith <mgalbraith@...e.de>
Cc:     Juergen Gross <jgross@...e.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Borislav Petkov <bp@...en8.de>
Subject: Re: [x86-tip] RSDP changes  converted i4790 box  SMP -> UP


* Mike Galbraith <mgalbraith@...e.de> wrote:

> Hi Juergen,
> 
> Yesterday I wanted to test the RETPOLINE stuff in tip and tip-rt, but
> discovered instead that my box had turned into a complete slug, not due
> to incredible RETPOLINE overhead, rather because box had forgotten that
> it had more than one CPU.  I was going to leave it for the weekend, but
> firing up gitk over morning java, I noticed the commits below, and sure
> enough, that's what broke my box.  Given other people's boxen work,
> seems likely that the authors of the AMI BIOS in this box were a bit
> more creative than usual.
> 
> commit 9ede5d5e672586e016eadd5c0aedb6f12e660029 (HEAD -> x86-tip)
> Author: Mike Galbraith <mgalbraith@...e.de>
> Date:   Fri Jan 12 04:17:52 2018 +0100
> 
>     Revert "x86/boot: Add the ACPI RSDP address to struct setup_header::acpi_rdsp_addr"
>     
>     This reverts commit 2f74cbf947f45fa082dda8eac1a1f1299a372f49.
> 
> commit 0d0b6a9a0d452eaf635580fce8319d49be8b45ed
> Author: Mike Galbraith <mgalbraith@...e.de>
> Date:   Fri Jan 12 04:17:30 2018 +0100
> 
>     Revert "x86/acpi: Take the RSDP address for boot parameters if available"
>     
>     This reverts commit 0c89cf36424f7c1177de8a5712514d7cc2eb369f.
> 

Ok, I've excluded tip:x86/boot from tip:master for the time being - these commits 
are not v4.16 ready apparently.

Thanks,

	Ingo