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Date: Sun, 15 Jun 2008 16:43:10 +0200
From: Kris Kennaway <kris@FreeBSD.org>
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To: Dmitry Morozovsky <marck@rinet.ru>
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Cc: delphij@FreeBSD.org, current@FreeBSD.org
Subject: Re: tmpfs panic
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Dmitry Morozovsky wrote:
> On Sun, 15 Jun 2008, Kris Kennaway wrote:
> 
> KK> > panic at umount phase (shutdown -r in progress):
> KK> 
> KK> This panic looks like you're using tmpfs as a module that was compiled with
> KK> different options than the kernel; can you confirm?
> 
> Should not be the case:
> 
> 
> root@hamster:~# l /boot/kernel.delphij/{kernel*,tmpfs*}
> -r-xr-xr-x  1 root  wheel   4174528 May 24 14:52 /boot/kernel.delphij/kernel*
> -r-xr-xr-x  1 root  wheel  19659791 May 24 14:52 /boot/kernel.delphij/kernel.symbols*
> -r-xr-xr-x  1 root  wheel     42592 May 24 15:16 /boot/kernel.delphij/tmpfs.ko*
> -r-xr-xr-x  1 root  wheel    419264 May 24 15:16 /boot/kernel.delphij/tmpfs.ko.symbols*

It still might be: if you have options in your kernel build that change 
the ABI (like DEBUG_VFS_LOCKS or DEBUG_LOCKS (I can never remember which 
one it is that breaks ABI)) then your modules need to be compiled with 
the same options.  make buildkernel builds modules with the same options 
as your kernel, but other methods do not.

Kris