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Subject: Re: [PATCH] watchdog: add pretimeout ioctl
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: minyard@acm.org
Cc: Linux Kernel <linux-kernel@vger.kernel.org>, Andrew Morton <akpm@osdl.org>,
       OpenIPMI Developers <openipmi-developer@lists.sourceforge.net>,
       Wim Van Sebroeck <wim@iguana.be>
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Date: Tue, 27 Jun 2006 19:59:45 +0100
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Ar Maw, 2006-06-27 am 13:22 -0500, ysgrifennodd minyard@acm.org:
> Some watchdog timers support the concept of a "pretimeout" which
> occurs some time before the real timeout.  The pretimeout can
> be delivered via an interrupt or NMI and can be used to panic
> the system when it occurs (so you get useful information instead
> of a blind reboot).

All watchdogs can do pre-timeouts in software so possibly this should
use a software fallback as well if you want good coverage ?