From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Date: Sun, 16 Feb 2003 22:11:08 -0700 To: Jan-Benedict Glaw Cc: parisc-linux@parisc-linux.org Subject: Re: [parisc-linux] Watchdog on parisc? Message-ID: <20030217051108.GB17823@dsl2.external.hp.com> References: <20030214181124.GJ13355@lug-owl.de> <20030216083110.GC18888@dsl2.external.hp.com> <20030216094234.GG351@lug-owl.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <20030216094234.GG351@lug-owl.de> From: grundler@dsl2.external.hp.com (Grant Grundler) Sender: parisc-linux-admin@lists.parisc-linux.org Errors-To: parisc-linux-admin@lists.parisc-linux.org List-Help: List-Post: List-Subscribe: , List-Id: parisc-linux developers list List-Unsubscribe: , List-Archive: On Sun, Feb 16, 2003 at 10:42:35AM +0100, Jan-Benedict Glaw wrote: > So there's nothing what's like a watchdog as you know it from some > machines (SGI Indys for example) or as add-on cards in machines (PCI/ISA > cards). Offhand, I think all the HP9000/8xx servers have either built-in or add-on "management ports" for remote console. And that always includes ability to reset or cycle power on the machine (or generate TOC). > > not if it's what I'm thinking of (transaction timeout, ie causes an > > HPMC). This is a built-in HW feature. > > Hmmm... Triggering a HPMC would be a neat feature. So we could think > about a way to initiate something that, if not handled, would trigger a > HPMC some 60 seconds later:-? Generating an HPMC is easy. reference an address in MMIO space that isn't maintained by a device. Figuring out a failsafe way of knowing when to trigger the HPMC is the hardpart. Besides, Lamont proposed a patch to reset the machine after HPMC/panic. I thought it was a great idea but several people I trust tell me it needs a bit more work. grant