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

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

The following reply was made to PR kern/40474; it has been noted by GNATS.

From: Andrew Doran <ad%netbsd.org@localhost>
To: David Holland <dholland-bugs%netbsd.org@localhost>
Cc: kivinen%iki.fi@localhost, kern-bug-people%netbsd.org@localhost, 
gnats-admin%netbsd.org@localhost,
        netbsd-bugs%netbsd.org@localhost, gnats-bugs%netbsd.org@localhost
Subject: Re: kern/40474: Kernel panic after remounting raid root with softdep
Date: Sun, 25 Jan 2009 21:40:58 +0000

 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