linux-kernel - Re: [PATCH] x86, apic: Check fadt x2apic phys in x2apic_phys

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Message-ID: <20130205122432.GE21455@gmail.com>
Date:	Tue, 5 Feb 2013 13:24:32 +0100
From:	Ingo Molnar <mingo@...nel.org>
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>, linux-kernel@...r.kernel.org,
	Stoney Wang <song-bo.wang@...com>, stable@...nel.org
Subject: Re: [PATCH] x86, apic: Check fadt x2apic phys in x2apic_phys_probe()


* Yinghai Lu <yinghai@...nel.org> wrote:

> From: Stoney Wang <song-bo.wang@...com>
> 
> When HP ProLiant DL980 G7 Server boot without x2apic_phys, there will be
> intermittent lost interrupts and could result in a hang or data loss.

What does 'boot without x2apic_phys' mean?

Does it mean x2apic_phys=0 boot command line? Or, because 
x2apic_phys is off by default, does it simply mean that if it's 
booted with a default kernel, without any workaround specified 
on the boot command line?

Thanks,

	Ingo
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