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Date:      Mon, 6 Jul 1998 18:58:50 +0100 
From:      "Alton, Matthew" <Matthew.Alton@anheuser-busch.com>
To:        "'Erick Engelke'" <erick@dark.uwaterloo.ca>
Cc:        "'hackers@freebsd.org'" <hackers@FreeBSD.ORG>, "'freebsd-fs@freebsd.org'" <freebsd-fs@FreeBSD.ORG>, "Smallie, Scott" <Scott.Smallie@anheuser-busch.com>
Subject:   RE: lfs
Message-ID:  <31B3F0BF1C40D11192A700805FD48BF901776600@STLABCEXG011>

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> -----Original Message-----
> From:	Erick Engelke [SMTP:erick@dark.uwaterloo.ca]
> Sent:	Friday, July 03, 1998 4:54 PM
> To:	Alton, Matthew
> Subject:	RE: lfs
> 
> 
> 
> On Tue, 30 Jun 1998, Alton, Matthew wrote:
> > > Like others in the past, I'm interested in seeing LFS completed.
> 
> > I've been mucking around with this for awhile.  We should cooperate.
> 
> Sure, but this will be a bit embarrassing for the first message or
> two.
> 
> The first steps I've taken were obvious... even for me as a FreeBSD
> kernal
> new guy (all my other kernel work has been various RTOS, Microsoft and
> OS/2)...  compile this as a LKM and try her out. 
> 
> I see that a newlfs'd partition shows up nicely with the ifile log
> file
> and lost+found.  But as soon as sync happens, whether timed or due to
> a
> umount or file i/o, we have a panic. 
	[Alton, Matthew]  
	Are you getting a core dump for kgdb?  I don't have a scratch
box running 
	this code right now.  I've got a nasty old 486/33 almost up for
testing purposes
	but its imbecilic BIOS won't boot with an NE2000 clone in the
bus.
>  
> Since successive boots don't notice the updates, I'm assuming the log
> is
> never being updated.  Possibly the kernel pages are not mapped to
> backing
> store... as a first guess.  I'll try lfsdump to investigate.
> 
> I've started adding debugging code to figure out how far we get.
> Hmmm, where do printfs send their output... nowhere I happen to be
> looking?
	[Alton, Matthew]  
	I thought they went to /dev/console but the relevant descriptors
may be closed
	when lfs is using them.  Can anybody provide the correct poop on
kernel-mode
	debug output to /dev/console before I go and spontaneously
reinvent the wheel?

> Also, how do I make this pop into the kernel debugger?
	[Alton, Matthew]  
	See http://www.freebsd.org/handbook/handbook297.html#627
> Sorry for the startup questions.  
	[Alton, Matthew]  
	Don't apologise, for crying out loud.  I've been starting up for
17 years ;-)

> Erick
> 
> 

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