Re: kern/40474: Kernel panic after remounting raid root with softdep

[Andrew Doran <ad%netbsd.org@localhost>]

On Sun, Jan 25, 2009 at 09:07:55PM +0000, David Holland wrote:
> On Sun, Jan 25, 2009 at 11:05:00AM +0000, kivinen%iki.fi@localhost wrote:
>  >    The system has mirrored raid as root, and when I boot it up
>  >    and then run mount -o softdep -u / the command works, but after
>  >    that next time I start "vi" the machine panics. The mount
>  >    command does not show that the softdep took effect (i.e
>  >    it still list options as local), and if I can still 
>  >    run some other programs from the root filesystem. The 
>  >    file edited with vi does not matter, and crash happens
>  >    even if no file is given. If this is tried on the second 
>  >    (non root disk) then this does not happen, even if the 
>  >    vi binary is copied to the other disk (i.e. mount the
>  >    another disk without softdep, remount it with -u -o softdep
>  >    and then try to run vi from there do work). 
>  > 
>  >    I assume this might be related to somehow to the way 
>  >    vi creates temp files or something.
> 
> I'm pretty sure turning softdep on after mount is a known problem,

Yes, and turning it off.

Andrew