Date: Mon, 16 Feb 1998 14:23:45 -0800 (PST) From: Simon Shapiro <shimon@simon-shapiro.org> To: Julian Elischer <julian@whistle.com> Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: WatchDog Timer Message-ID: <XFMail.980216142345.shimon@simon-shapiro.org> In-Reply-To: <Pine.BSF.3.95.980216135000.8949I-100000@current1.whistle.com>
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On 16-Feb-98 Julian Elischer wrote: > eh? > what watchdog? > we have a hook that is called by the kernel > when it is doing long uninterrupted operations (e.g. dumping core) > but it's just a hook. The user needs to supply their own hardware > watchdog.. (and code to tickle it) > > julian If there is no driver for such hardware today, I'll write it this week. This is really not the same as a kernel's internal watchdog. What we are talking about here is used to build a dead-man switch; In case of O/S catastrophic failure, this device will reboot the machine, or in the case of HA/FT, signal to the rest of the ``system'' that a Unix instance just died. I simply do not want to write a driver that was already written. What is the kernel's hook name/path? Maybe we can merge the two, or at least relate to each other. As in ``If the kernel is busy with a long, uninterrupted operation, we automatically mask off the dead-man switch''. ---------- Sincerely Yours, Simon Shapiro Shimon@Simon-Shapiro.ORG Voice: 503.708.7858 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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