Bug#382977: [Pbuilder-maint] Bug#382977: fails to umount with internal pdebuild

[Junichi Uekawa]

Hi,

> If I use the internel pdebuild, the process fails to umount one of
> my bind mounts after the build is complete:
> 
>  -> unmounting /tmp/pbuilder-shared filesystem
> umount: /tmp/pbuilder-shared: not mounted
> umount: /tmp/pbuilder-shared: not mounted
> W: Retrying to unmount /tmp/pbuilder-shared
> umount: /var/cache/pbuilder/build//24872//tmp/pbuilder-shared: not mounted
> 
>   Could not unmount /tmp/pbuilder-shared, there might be some program 
>   still using files in /proc (klogd?).
>   Please check and kill the process manually so that I can unmount /tmp/pbuilder-shared
> 
>   This error is only happens with chroot; try using user-mode-linux to 
>   avoid this message.
> 
> 
> This is the relevant configuration:
> 
> lapse:~> grep -A3 shared ~/.pbuilderrc                                   #[353]
> SHARED=/tmp/pbuilder-shared
> mkdir -p $SHARED
> chown $PBUID:$PBGID $SHARED
> BINDMOUNTS="${BINDMOUNTS:+$BINDMOUNTS }$SHARED"
> 
> 
> It *did* mount it:
> 
> Building the build Environment
> [...]
> -> Mounting /tmp/pbuilder-shared
> 
> 
> The only way to solve this is by doing
> 
> mount -o bind /tmp/pbuilder-shared /var/cache/pbuilder/build//24872//tmp/pbuilder-shared


1. Which kernel ?
I suppose this is stock ?
Kernel: Linux 2.6.17-1-686

2. what does /proc/mounts say when it's failing to umount?

3. is it reproducible all the time?


regards,
	junichi
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