[Kernel-packages] [Bug 1667838] Re: zpool export mpu1pool cannot export 'mpu1pool': pool is busy
OK, thanks for the update. -- 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 totalusedfree shared buff/cache available Mem: 7.7G5.1G502M837M2.1G 1.0G Swap: 8.0G428M7.6G # swapoff -a # free -mh totalusedfree shared buff/cache available Mem: 7.7G1.5G4.8G366M1.4G 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
[Kernel-packages] [Bug 1667838] Re: zpool export mpu1pool cannot export 'mpu1pool': pool is busy
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 totalusedfree shared buff/cache available Mem: 7.7G5.1G502M837M2.1G 1.0G Swap: 8.0G428M7.6G # swapoff -a # free -mh totalusedfree shared buff/cache available Mem: 7.7G1.5G4.8G366M1.4G 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
[Kernel-packages] [Bug 1667838] Re: zpool export mpu1pool cannot export 'mpu1pool': pool is busy
Actually I've just figured why I could not export the pool. One of my docker containers was using the FS, so I could not see it with the "lsof" :/ (mount namespace). I figured when I saw multiple zfs kernel calls with bpftrace :-) I am wondering what would be required for the "zfs unmount -a" to actually fail when its FS is actually used in some other namespace? -- 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 totalusedfree shared buff/cache available Mem: 7.7G5.1G502M837M2.1G 1.0G Swap: 8.0G428M7.6G # swapoff -a # free -mh totalusedfree shared buff/cache available Mem: 7.7G1.5G4.8G366M1.4G 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
[Kernel-packages] [Bug 1667838] Re: zpool export mpu1pool cannot export 'mpu1pool': pool is busy
Hum, just came across the same issue again: # modinfo zfs | head -2 filename: /lib/modules/4.15.0-43-generic/kernel/zfs/zfs/zfs.ko version:0.7.5-1ubuntu16.4 # sync # echo 3 > /proc/sys/vm/drop_caches # zfs unmount -a # swapoff -a # zpool export WD4Gpool cannot export 'WD4Gpool': pool is busy # lsof nor fuser do not show anything related to the WD4Gpool mountpoints. # dmsetup table does not show anything related to ZFS as expected (I do not have the volume datasets) Please re-open this bug. -- 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 totalusedfree shared buff/cache available Mem: 7.7G5.1G502M837M2.1G 1.0G Swap: 8.0G428M7.6G # swapoff -a # free -mh totalusedfree shared buff/cache available Mem: 7.7G1.5G4.8G366M1.4G 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
[Kernel-packages] [Bug 1667838] Re: zpool export mpu1pool cannot export 'mpu1pool': pool is busy
Hi, sorry, I have missed your reply of 2018-07-17. I wanted to highlight that ZFS's export was blocked until "swapoff -a" command was ran. Then, I have mentioned in the OP that the filesystem was unmounted, hence there was no possibility for any file to be opened. And what information was requested in the comment #1? -- 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 totalusedfree shared buff/cache available Mem: 7.7G5.1G502M837M2.1G 1.0G Swap: 8.0G428M7.6G # swapoff -a # free -mh totalusedfree shared buff/cache available Mem: 7.7G1.5G4.8G366M1.4G 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
[Kernel-packages] [Bug 1667838] Re: zpool export mpu1pool cannot export 'mpu1pool': pool is busy
There has been no reply to this information request in comment #1, so I am closing this bug. Please re-open it if it still an issue. ** Changed in: zfs-linux (Ubuntu) Status: Incomplete => Won't Fix -- 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 totalusedfree shared buff/cache available Mem: 7.7G5.1G502M837M2.1G 1.0G Swap: 8.0G428M7.6G # swapoff -a # free -mh totalusedfree shared buff/cache available Mem: 7.7G1.5G4.8G366M1.4G 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
[Kernel-packages] [Bug 1667838] Re: zpool export mpu1pool cannot export 'mpu1pool': pool is busy
Internally zpool export will call unshare and umount, so a "pool is busy" indicates that process(es) has/have one or more files open and so this operation fails. One can check for these processes using either: lsof -Pn or fuser -vm /poolname (where poolname is the name of your pool) and it's worth checking the status of the pool using: zpool status -v ** Changed in: zfs-linux (Ubuntu) Status: In Progress => Incomplete -- 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: Incomplete 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 totalusedfree shared buff/cache available Mem: 7.7G5.1G502M837M2.1G 1.0G Swap: 8.0G428M7.6G # swapoff -a # free -mh totalusedfree shared buff/cache available Mem: 7.7G1.5G4.8G366M1.4G 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
[Kernel-packages] [Bug 1667838] Re: zpool export mpu1pool cannot export 'mpu1pool': pool is busy
** Changed in: zfs-linux (Ubuntu) Status: New => In Progress ** Changed in: zfs-linux (Ubuntu) Importance: Undecided => Medium ** Changed in: zfs-linux (Ubuntu) Assignee: (unassigned) => Colin Ian King (colin-king) -- 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: In Progress 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 totalusedfree shared buff/cache available Mem: 7.7G5.1G502M837M2.1G 1.0G Swap: 8.0G428M7.6G # swapoff -a # free -mh totalusedfree shared buff/cache available Mem: 7.7G1.5G4.8G366M1.4G 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
