linux-kernel - Re: nmi_watchdog on x86

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Date:	Thu, 14 Feb 2008 22:01:11 +0800
From:	"Jike Song" <albcamus@...il.com>
To:	"Yinghai Lu" <yhlu.kernel@...il.com>
Cc:	"Andi Kleen" <ak@...e.de>, "Thomas Gleixner" <tglx@...utronix.de>,
	"Ingo Molnar" <mingo@...e.hu>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>
Subject: Re: nmi_watchdog on x86_64

On Tue, Oct 16, 2007 at 10:12 AM, Yinghai Lu <yhlu.kernel@...il.com> wrote:
> just found my on hand ck804, and mcp55 based AMD servers:
>  nmi_watchdog=1 doesn't work
>  but nmi_watchdog=2 does work
>
>  =1, it say: IOAPIC 8259A virtual wire mode...
>
>  Did nmi_watchdog=1 work on any other amd64 platform?
>

I booted 2.6.23 on a HP NX6325 laptop with nmi_watchdog=1, and dmesg says,

...
..MP-BIOS bug: 8254 timer not connected to IO-APIC
timer doesn't work through the IO-APIC - disabling NMI Watchdog!

nmi_watchdog remains to be 0, as I read by a simple kernel module.

Regards,
Jike
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