[CentOS] kpartx can not detach

[Jim Perrin]

On 03/07/2018 04:48 AM, Leon Fauster wrote:
> OS: EL6 - sometimes I use 
> 
> kpartx -a /mnt/.../lvdisk.img 
> 
> to map the partitions and mount them via 
> 
> /dev/mapper/loop0pX
> 
> After using the disk (unmounting it) I noticed that 
> detaching such mapping via kpartx -d does not result 
> in freeing up the loop devices. Results: System reboots 
> shows that the filesystem where lvdisk.img is located 
> can't be unmounted. 
> 
> lsof, fuser, ps does not show any usage. Even removing the 
> device node via 
> 
> dmsetup remove /dev/mapper/loop0pX
> 
> does not help. Trying to unmount the underlying filesystem 
> still shows /mnt: device is busy.
> 
> Any other suggestions would be greatly appreciated!


Do you have an open shell/terminal session hanging out in the /mnt
directory you used?


-- 
Jim Perrin
The CentOS Project | http://www.centos.org
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