Bug#490984: linux-image-2.6-686: / is busy causes EXT3-fs: INFO: recovery required on readonly filesystem

[maximilian attems <max@stro.at>]

On Tue, 15 Jul 2008, Kingsley G. Morse Jr. wrote:

> Thanks for maintaining debian's kernel packages.

hmm how is the bug you reported related to the kernel?


please ask such support the next time on the debian user
mailing list.
 
> They're a remarkable technology in more ways than
> one.
> 
> Here's how I duplicate the bug.
> 
> 1.) $ shutdown -r now
> 
> 2.) ctl-alt-F7
> 
> 3.) look quickly for something like
> 
>     "mount: / is busy"
> 
> 4.) After the system has rebooted, if the root
>     filesystem is EXT3, look for 
> 
>         EXT3-fs: INFO: recovery required on readonly filesystem.
>     
>     in /var/log/messages. 
>     
>     If the root filesystem is EXT2, I get a long,
>     slow fsck recovery.
>     
> 
> It seems to me that this can be partially
> explained by the shutdown command running a
> script named 
> 
>     /etc/init.d/umountroot
> 
> which calls the "mount" command to remount the
> root file system as read only.
> 
> It fails, and complains that
> 
>     "/ is busy"
> 
> Since the root file system wasn't cleanly
> unmounted, it'll be recovered during the next
> boot.
> 
> I investigated other processes interfering with
> the root file system, without result.
> 
> However, it seems that inserting
> 
>     "cat /proc/mounts"
> 
> just before the (re)mount command in
> 
>     /etc/init.d/umountroot
> 
> usually allows mount to complete.
> 
> As an aside, the words "mount" and "remount" occur
> hundreds of times in the changelog for 2.6.26.
> 
> Frankly, I'm a little worried about data
> corrutpion.
> 
> Thanks,
> Kingsley

not reproducible here,
please use debian installer standard installs.

-- 
maks