Ok, this is not limited to ZFS. So that's solely due to namespace isolation.
"It's not a bug, it's a feature" (c) :-) -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to zfs-linux in Ubuntu. https://bugs.launchpad.net/bugs/1667838 Title: zpool export mpu1pool cannot export 'mpu1pool': pool is busy Status in zfs-linux package in Ubuntu: Won't Fix Bug description: $ lsb_release -rd Description: Ubuntu 16.04.2 LTS Release: 16.04 Linux 4.4.0-64-generic $ apt-cache policy zfsutils-linux zfsutils-linux: Installed: 0.6.5.6-0ubuntu15 # modinfo zfs |head filename: /lib/modules/4.4.0-64-generic/kernel/zfs/zfs/zfs.ko version: 0.6.5.6-0ubuntu15 I was not able to unmount a ZFS pool: # zpool export mpu1pool cannot export 'mpu1pool': pool is busy The filesystems were unmounted and there was nothing that would be blocking them FS. Neither sync, echo 3 > /proc/sys/vm/drop_caches helped. The only way worked to export a ZFS pool was to turn off the SWAP: # lsof -Pn |grep -i mpu1 lsof: WARNING: can't stat() fuse.gvfsd-fuse file system /run/user/1000/gvfs Output information may be incomplete. # free -mh total used free shared buff/cache available Mem: 7.7G 5.1G 502M 837M 2.1G 1.0G Swap: 8.0G 428M 7.6G # swapoff -a # free -mh total used free shared buff/cache available Mem: 7.7G 1.5G 4.8G 366M 1.4G 5.2G Swap: 0B 0B 0B # zpool export mpu1pool # echo $? 0 # swapon -a It is not obvious that the SWAP has to be freed before one can export ZFS pool. Would it be possible to improve this situation? Kind regards, Andrey Arapov To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/zfs-linux/+bug/1667838/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
