how to find out where a umount is failing on -> vnodes: count 1 ?

Reply: David Wolfskill : "Re: how to find out where a umount is failing on -> vnodes: count 1 ?"
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From: Ronald Klop <ronald-lists_at_klop.ws>
Date: Fri, 27 Sep 2024 12:28:22 UTC

Hi,

Sometimes when I stop a jail the filesystem is not unmounted.

/data/jails/freebsd14.1-RELEASE on /data/jails/jenkins/_root (nullfs, local, read-only, nfsv4acls, fsid 07ff002929000000, vnodes: count 1 )
[root@rpi4 ~]# umount  07ff002929000000
umount: unmount of /data/jails/jenkins/_root failed: Device busy

Sometimes after some time the umount does succeed.

How can I find what is keeping this mount busy?

Ronald.