Date: Tue, 20 Jul 2004 18:03:59 -0700 From: Julian Elischer <julian@elischer.org> To: "Greg 'groggy' Lehey" <grog@freebsd.org> Cc: Andrew Gallatin <gallatin@cs.duke.edu> Subject: Re: Excellent job on the firewire support! Message-ID: <40FDC0FF.30901@elischer.org> In-Reply-To: <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> <20040721003850.GD78419@wantadilla.lemis.com>
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Greg 'groggy' Lehey wrote: >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? > He helped "Mr Firewire" get it going again the next day... > >Greg >-- >Note: I discard all HTML mail unseen. >Finger grog@FreeBSD.org for PGP public key. >See complete headers for address and phone numbers. > >
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