From owner-freebsd-current@FreeBSD.ORG Wed Jul 21 00:38:55 2004 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 02B4916A4CE; Wed, 21 Jul 2004 00:38:55 +0000 (GMT) Received: from ozlabs.org (ozlabs.org [203.10.76.45]) by mx1.FreeBSD.org (Postfix) with ESMTP id 74B0943D41; Wed, 21 Jul 2004 00:38:54 +0000 (GMT) (envelope-from grog@lemis.com) Received: from blackwater.lemis.com (blackwater.lemis.com [192.109.197.80]) by ozlabs.org (Postfix) with ESMTP id 563E12BDEC; Wed, 21 Jul 2004 10:38:52 +1000 (EST) Received: by blackwater.lemis.com (Postfix, from userid 1004) id 37668511FE; Wed, 21 Jul 2004 10:08:50 +0930 (CST) Date: Wed, 21 Jul 2004 10:08:50 +0930 From: Greg 'groggy' Lehey To: Hidetoshi Shimokawa Message-ID: <20040721003850.GD78419@wantadilla.lemis.com> References: <16634.47272.768935.436137@grasshopper.cs.duke.edu> <200407182039.10773.dfr@nlsystems.com> <16634.54674.966908.540880@grasshopper.cs.duke.edu> <200407182104.53221.dfr@nlsystems.com> <87hds3pfgv.wl@tora.nunu.org> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="DrWhICOqskFTAXiy" Content-Disposition: inline In-Reply-To: <87hds3pfgv.wl@tora.nunu.org> User-Agent: Mutt/1.4.1i Organization: The FreeBSD Project Phone: +61-8-8388-8286 Fax: +61-8-8388-8725 Mobile: +61-418-838-708 WWW-Home-Page: http://www.FreeBSD.org/ X-PGP-Fingerprint: 9A1B 8202 BCCE B846 F92F 09AC 22E6 F290 507A 4223 cc: simokawa@freebsd.org cc: freebsd-current@freebsd.org cc: Andrew Gallatin Subject: Re: Excellent job on the firewire support! X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 21 Jul 2004 00:38:55 -0000 --DrWhICOqskFTAXiy Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Tuesday, 20 July 2004 at 11:41:52 +0900, Hidetoshi Shimokawa wrote: > (sorry for resending) > > At Sun, 18 Jul 2004 21:04:53 +0100, > Doug Rabson wrote: >>> 2) Is dcons usable after a panic (ie, DDB or KDB_TRACE)? Or is it >>> only usable for remote-gdb? >> >> Dcons provides two full duplex streams - one for console and one for >> gdb. You can use DDB on the console just like normal. > > It's designed for such panic/debugging situation. > Actually, it's rather inefficient for usual situation > but the speed of FireWire hide the problem ;-) I think that the most spectacular use of firewire is debugging a completely hung system. If you've already attached, the debugger can still access the memory of a system which isn't reacting *at all*. Obviously you can't continue execution, but just seeing what's in memory is a great advantage. On the other hand, it was my understanding that marcel's new kernel debugging framework broke firewire debugging. What's the current status there? Greg -- Note: I discard all HTML mail unseen. Finger grog@FreeBSD.org for PGP public key. See complete headers for address and phone numbers. --DrWhICOqskFTAXiy Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.0 (FreeBSD) iD8DBQFA/bsaIubykFB6QiMRApDgAJ9lCKg1HM81MoE7wra4iQqboXYYfgCdHqm8 PdGC6ir+/b6BnWMT0emAIQ4= =iHPh -----END PGP SIGNATURE----- --DrWhICOqskFTAXiy--