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Date: Fri, 28 May 2004 16:51:19 -0700
From: Andrew Morton <akpm@osdl.org>
To: sboyce@blueyonder.co.uk
Cc: linux-kernel@vger.kernel.org
Subject: Re: 2.6.7-rc1-mm1 lockup
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Sid Boyce <sboyce@blueyonder.co.uk> wrote:
>
> A7N8X-E motherboard, IDE HD's hda and hdc. Hangs forever as shown below. 
> SYSRQ does nothing, needs a hard reset. 2.6.5-mm5 boots OK as does 
> vanilla 2.6.7-rc1 which was built after 3 reboots of 2.6.7-rc1-mm1 hung.

Could you try adding `nmi_watchdog=1' to the boot command line?  Make sure
that CONFIG_X86_LOCAL_APIC is enabled in kernel config.