From owner-freebsd-hackers Mon Feb 16 14:18:07 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id OAA17269 for freebsd-hackers-outgoing; Mon, 16 Feb 1998 14:18:07 -0800 (PST) (envelope-from owner-freebsd-hackers@FreeBSD.ORG) Received: from sendero.simon-shapiro.org (sendero-fxp0.Simon-Shapiro.ORG [206.190.148.34]) by hub.freebsd.org (8.8.8/8.8.8) with SMTP id OAA17165 for ; Mon, 16 Feb 1998 14:17:36 -0800 (PST) (envelope-from shimon@sendero-fxp0.simon-shapiro.org) Received: (qmail 8392 invoked by uid 1000); 16 Feb 1998 22:23:45 -0000 Message-ID: X-Mailer: XFMail 1.3-alpha-020998 [p0] on FreeBSD X-Priority: 3 (Normal) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 8bit MIME-Version: 1.0 In-Reply-To: Date: Mon, 16 Feb 1998 14:23:45 -0800 (PST) Reply-To: shimon@simon-shapiro.org Organization: The Simon Shapiro Foundation From: Simon Shapiro To: Julian Elischer Subject: Re: WatchDog Timer Cc: freebsd-hackers@FreeBSD.ORG Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG 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