From owner-freebsd-current  Sat Mar 15 21:59:56 2003
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Date: Sat, 15 Mar 2003 21:59:53 -0800 (PST)
From: Shizuka Kudo <shizukakudo_99@yahoo.com>
Subject: Re: panic on boot (devfs_find) 
To: Bryan Liesner <bleez@verizon.net>,
	Poul-Henning Kamp <phk@phk.freebsd.dk>
Cc: freebsd-current@FreeBSD.ORG
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--- Bryan Liesner <bleez@verizon.net> wrote:
> 
> I was able to get a kernel up and running (strangely) on 3/12, but
> commits after that cause an immediate panic as soon as init starts.
> 
> If I build a kernel from sources cut off at 3/10/2003 at 12:00,
> everything works fine.
> 

It is related to the sys/geom/geom_event.c commit on 3/11/2003:

> Revision 1.20 / (download) - annotate - [select for diffs], Mon Mar 10 23:41:41 2003 UTC (5
days, 5 hours ago) by phk 
> Branch: MAIN 
> CVS Tags: HEAD 
> Changes since 1.19: +5 -0 lines
> Diff to previous 1.19 (colored) 
> 
> If we run out of consumers while orphaning them, and the provider's geom
> is withering, destroy the provider when done.
> 
> This was exposed by the recent change to geom_dev's orphaning logic

If I reverted it back to a previous version (1.19) then the machine booted OK.

BTW, I also found that adding INVARIANTS options into the kernel can prevent this problem as well.

Regards,

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