linux-kernel - Re: [PATCH] x86: update mptable v7

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Message-id: <alpine.LFD.1.10.0806181812580.3074@localhost.localdomain>
Date:	Wed, 18 Jun 2008 18:18:34 -0400 (EDT)
From:	Len Brown <lenb@...nel.org>
To:	Yinghai Lu <yhlu.kernel@...il.com>
Cc:	Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86: update mptable v7



On Sun, 1 Jun 2008, Yinghai Lu wrote:

> 
> make mptable to be consistent to acpi routing, so we could
> 1. kexec kernel with acpi=off
> 2. workaround BIOS that acpi routing is working, but mptable is not right.
>    so can use kernel/kexec to start other os that doesn't have good acpi support

Is this an effort to boot an ACPI-mode kernel,
and then kexec a non-ACPI kernel?

Doing so could confuse the heck out of the platform firmware,
which will think that an ACPI-mode kernel is still running.

Note that it is a historic artifact, now considered a bug,
that ACPI uses the MPS code.  We should be divorcing these
two bodies of code rather than mixing them further.

-Len
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