Why are you using force and lazy options to umount cephfs? Those should only be done if there are problems unmounting the volume. Lazy umount will indeed leave things running, but just quickly remove the FS from it's mount point. You should rarely use umount -f and even more rarely use umount -l. From the help for umount is the following excerpt. Having orphaned processes after using a lazy umount is the purpose of the option.
-l --lazy
Lazy unmount. Detach the filesystem from the filesystem hierarchy
now, and cleanup all references to the filesystem as soon as
it is not busy anymore. (Requires kernel 2.4.11 or later.)
On Mon, Feb 12, 2018 at 2:44 PM Florent B <florent@xxxxxxxxxxx> wrote:
Hi,
I use Ceph Luminous last version on Debian Jessie.
Sometimes, when I unmount my ceph-fuse FS using "umount -f -l
/mnt/point", unmounting is fine but "ceph-fuse" process continues running.
Is that expected ? How to fix this ?
Thank you.
Florent
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