Date: Wed, 21 Jul 2004 10:08:50 +0930 From: Greg 'groggy' Lehey <grog@FreeBSD.org> To: Hidetoshi Shimokawa <simokawa@sat.t.u-tokyo.ac.jp> Cc: Andrew Gallatin <gallatin@cs.duke.edu> Subject: Re: Excellent job on the firewire support! Message-ID: <20040721003850.GD78419@wantadilla.lemis.com> In-Reply-To: <87hds3pfgv.wl@tora.nunu.org> 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>
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--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--
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