Date: Mon, 15 Nov 2004 22:15:40 -0800 From: "David G. Lawrence" <dg@dglawrence.com> To: current@freebsd.org Subject: Re: Deadlock problems with 'kill PID' on CURRENT Message-ID: <20041116061540.GC3411@ncore.dglawrence.com> In-Reply-To: <20041116050659.GD57615@squash.dsto.defence.gov.au> References: <20041115142036.D53544@cvs.imp.ch> <Pine.NEB.3.96L.1041115133457.80435A-100000@fledge.watson.org> <20041116002837.GE56252@squash.dsto.defence.gov.au> <m3wtwmtyh4.fsf@merlin.emma.line.org> <20041116050659.GD57615@squash.dsto.defence.gov.au>
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> Okay, trying to see the purpose of this button ? > > Why have an NMI button to break into DDB when you can just use CTRL-ALT-ESC ? NMI is "Non Maskable Interrupt", which means that it cannot be blocked by the OS. Keyboard interrupts can be blocked (masked), and thus may not work under some conditions - especially while the kernel is already processing an interrupt. -DG David G. Lawrence President Download Technologies, Inc. - http://www.downloadtech.com - (866) 399 8500 TeraSolutions, Inc. - http://www.terasolutions.com - (888) 346 7175 The FreeBSD Project - http://www.freebsd.org Pave the road of life with opportunities.
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