Date: Mon, 30 Nov 2020 06:09:34 -0500 From: Ryan Moeller <freqlabs@FreeBSD.org> To: freebsd-current@freebsd.org Subject: Re: zpool export: umount failed, device inexplicably busy Message-ID: <747403d2-362a-1279-ca55-8d8c2a4a4c65@FreeBSD.org> In-Reply-To: <a4e3b895-78d2-4b0a-1cb1-477f35bc437c@gmail.com> References: <a4e3b895-78d2-4b0a-1cb1-477f35bc437c@gmail.com>
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On 10/6/20 4:29 PM, Graham Perrin wrote: > lsof finds no open file. Please be wary of lsof. I'm not sure it works on OpenZFS. The port reaches into /usr/src for zfs headers in locations that don't exist anymore to access kernel memory in /dev/kmem using structs that are different in OpenZFS. It is likely not building the ZFS support code on 13-current, and it is not expected to work on 12 with openzfs from ports, either. -Ryan > > How else might I tell why the device is busy? > > Mobile hard disk drive, USB. > > -- > > root@momh167-gjp4-8570p:~ # zpool export Transcend > cannot unmount '/Volumes/t500': umount failed > root@momh167-gjp4-8570p:~ # lsof /Volumes/t500 > root@momh167-gjp4-8570p:~ # zpool export Transcend > cannot unmount '/Volumes/t500': umount failed > root@momh167-gjp4-8570p:~ # zpool export Transcend > cannot unmount '/Volumes/t500': umount failed > root@momh167-gjp4-8570p:~ # umount /Volumes/t500/ > umount: unmount of /Volumes/t500 failed: Device busy > root@momh167-gjp4-8570p:~ # lsof /Volumes/t500 > root@momh167-gjp4-8570p:~ # zfs version > zfs-0.8.0-1 > zfs-kmod-0.8.0-1 > root@momh167-gjp4-8570p:~ # zpool iostat Transcend 3 > capacity operations bandwidth > pool alloc free read write read write > ---------- ----- ----- ----- ----- ----- ----- > Transcend 126G 338G 0 0 3.29K 1.45K > Transcend 126G 338G 0 0 0 0 > Transcend 126G 338G 0 0 0 0 > Transcend 126G 338G 0 0 0 0 > Transcend 126G 338G 0 0 0 0 > Transcend 126G 338G 0 0 0 0 > ^C > root@momh167-gjp4-8570p:~ # umount /Volumes/t500/ > umount: unmount of /Volumes/t500 failed: Device busy > root@momh167-gjp4-8570p:~ # ls -ahl /Volumes/t500 > total 10 > drwxr-xr-x 3 root wheel 3B Sep 2 19:02 . > drwxr-xr-x 4 root wheel 4B Sep 5 09:15 .. > drwxr-xr-x 6 grahamperrin grahamperrin 6B Sep 11 17:54 VirtualBox > root@momh167-gjp4-8570p:~ # zpool status Transcend > pool: Transcend > state: ONLINE > scan: scrub repaired 0B in 00:28:07 with 0 errors on Tue Oct 6 > 00:03:13 2020 > config: > > NAME STATE READ WRITE CKSUM > Transcend ONLINE 0 0 0 > da0p1 ONLINE 0 0 0 > > errors: No known data errors > root@momh167-gjp4-8570p:~ # umount /Volumes/t500/ > umount: unmount of /Volumes/t500 failed: Device busy > root@momh167-gjp4-8570p:~ # lsof /Volumes/t500 > root@momh167-gjp4-8570p:~ # date ; uname -v > Tue Oct 6 21:20:17 BST 2020 > FreeBSD 13.0-CURRENT #67 r366424: Sun Oct 4 19:54:32 BST 2020 > root@momh167-gjp4-8570p:/usr/obj/usr/src/amd64.amd64/sys/GENERIC-NODEBUG > root@momh167-gjp4-8570p:~ # ls /dev/da* > /dev/da0 /dev/da0p1 > root@momh167-gjp4-8570p:~ # zfs get all Transcend Transcend/VirtualBox > NAME PROPERTY VALUE SOURCE > Transcend type filesystem - > Transcend creation Wed Sep 2 18:31 2020 - > Transcend used 126G - > Transcend available 324G - > Transcend referenced 126G - > Transcend compressratio 1.66x - > Transcend mounted yes - > Transcend quota none default > Transcend reservation none default > Transcend recordsize 128K default > Transcend mountpoint /Volumes/t500 local > Transcend sharenfs off default > Transcend checksum on default > Transcend compression zstd local > Transcend atime on default > Transcend devices on default > Transcend exec on default > Transcend setuid on default > Transcend readonly off default > Transcend jailed off default > Transcend snapdir hidden default > Transcend aclmode discard default > Transcend aclinherit restricted default > Transcend createtxg 1 - > Transcend canmount on default > Transcend xattr on default > Transcend copies 1 default > Transcend version 5 - > Transcend utf8only off - > Transcend normalization none - > Transcend casesensitivity sensitive - > Transcend vscan off default > Transcend nbmand off default > Transcend sharesmb off default > Transcend refquota none default > Transcend refreservation none default > Transcend guid 6806553549477274436 - > Transcend primarycache all default > Transcend secondarycache all default > Transcend usedbysnapshots 0B - > Transcend usedbydataset 126G - > Transcend usedbychildren 47.2M - > Transcend usedbyrefreservation 0B - > Transcend logbias latency default > Transcend objsetid 54 - > Transcend dedup off default > Transcend mlslabel none default > Transcend sync standard default > Transcend dnodesize legacy default > Transcend refcompressratio 1.66x - > Transcend written 126G - > Transcend logicalused 210G - > Transcend logicalreferenced 210G - > Transcend volmode default default > Transcend filesystem_limit none default > Transcend snapshot_limit none default > Transcend filesystem_count none default > Transcend snapshot_count none default > Transcend snapdev hidden default > Transcend context none default > Transcend fscontext none default > Transcend defcontext none default > Transcend rootcontext none default > Transcend relatime off default > Transcend redundant_metadata all default > Transcend overlay on default > Transcend encryption off default > Transcend keylocation none default > Transcend keyformat none default > Transcend pbkdf2iters 0 default > Transcend special_small_blocks 0 > default > Transcend/VirtualBox type filesystem - > Transcend/VirtualBox creation Wed Sep 2 19:02 2020 - > Transcend/VirtualBox used 200K - > Transcend/VirtualBox available 324G - > Transcend/VirtualBox referenced 200K - > Transcend/VirtualBox compressratio 1.00x - > Transcend/VirtualBox mounted no - > Transcend/VirtualBox quota none default > Transcend/VirtualBox reservation none default > Transcend/VirtualBox recordsize 128K default > Transcend/VirtualBox mountpoint /Volumes/t500/VirtualBox inherited > from Transcend > Transcend/VirtualBox sharenfs off default > Transcend/VirtualBox checksum on default > Transcend/VirtualBox compression zstd inherited from Transcend > Transcend/VirtualBox atime off local > Transcend/VirtualBox devices on default > Transcend/VirtualBox exec on default > Transcend/VirtualBox setuid on default > Transcend/VirtualBox readonly off default > Transcend/VirtualBox jailed off default > Transcend/VirtualBox snapdir hidden default > Transcend/VirtualBox aclmode discard default > Transcend/VirtualBox aclinherit restricted default > Transcend/VirtualBox createtxg 375 - > Transcend/VirtualBox canmount on default > Transcend/VirtualBox xattr on default > Transcend/VirtualBox copies 1 default > Transcend/VirtualBox version 5 - > Transcend/VirtualBox utf8only off - > Transcend/VirtualBox normalization none - > Transcend/VirtualBox casesensitivity sensitive - > Transcend/VirtualBox vscan off default > Transcend/VirtualBox nbmand off default > Transcend/VirtualBox sharesmb off default > Transcend/VirtualBox refquota none default > Transcend/VirtualBox refreservation none default > Transcend/VirtualBox guid 11240822048258000557 - > Transcend/VirtualBox primarycache all default > Transcend/VirtualBox secondarycache all default > Transcend/VirtualBox usedbysnapshots 0B - > Transcend/VirtualBox usedbydataset 200K - > Transcend/VirtualBox usedbychildren 0B - > Transcend/VirtualBox usedbyrefreservation 0B - > Transcend/VirtualBox logbias latency default > Transcend/VirtualBox objsetid 76 - > Transcend/VirtualBox dedup off default > Transcend/VirtualBox mlslabel none default > Transcend/VirtualBox sync standard default > Transcend/VirtualBox dnodesize legacy default > Transcend/VirtualBox refcompressratio 1.00x - > Transcend/VirtualBox written 200K - > Transcend/VirtualBox logicalused 49.5K - > Transcend/VirtualBox logicalreferenced 49.5K - > Transcend/VirtualBox volmode default default > Transcend/VirtualBox filesystem_limit none default > Transcend/VirtualBox snapshot_limit none default > Transcend/VirtualBox filesystem_count none default > Transcend/VirtualBox snapshot_count none default > Transcend/VirtualBox snapdev hidden default > Transcend/VirtualBox context none default > Transcend/VirtualBox fscontext none default > Transcend/VirtualBox defcontext none default > Transcend/VirtualBox rootcontext none default > Transcend/VirtualBox relatime off default > Transcend/VirtualBox redundant_metadata all default > Transcend/VirtualBox overlay on default > Transcend/VirtualBox encryption aes-256-gcm - > Transcend/VirtualBox keylocation prompt local > Transcend/VirtualBox keyformat passphrase - > Transcend/VirtualBox pbkdf2iters 350000 - > Transcend/VirtualBox encryptionroot Transcend/VirtualBox - > Transcend/VirtualBox keystatus unavailable - > Transcend/VirtualBox special_small_blocks 0 > default > root@momh167-gjp4-8570p:~ # zpool get all Transcend > NAME PROPERTY VALUE SOURCE > Transcend size 464G - > Transcend capacity 27% - > Transcend altroot - default > Transcend health ONLINE - > Transcend guid 8076233369858608335 - > Transcend version - default > Transcend bootfs - default > Transcend delegation on default > Transcend autoreplace off default > Transcend cachefile - default > Transcend failmode wait default > Transcend listsnapshots off default > Transcend autoexpand off default > Transcend dedupratio 1.00x - > Transcend free 338G - > Transcend allocated 126G - > Transcend readonly off - > Transcend ashift 0 default > Transcend comment - default > Transcend expandsize - - > Transcend freeing 0 - > Transcend fragmentation 12% - > Transcend leaked 0 - > Transcend multihost off default > Transcend checkpoint - - > Transcend load_guid 15610592478404149099 - > Transcend autotrim off default > Transcend feature@async_destroy enabled local > Transcend feature@empty_bpobj active local > Transcend feature@lz4_compress active local > Transcend feature@multi_vdev_crash_dump > enabled local > Transcend feature@spacemap_histogram active > local > Transcend feature@enabled_txg active local > Transcend feature@hole_birth active local > Transcend feature@extensible_dataset active > local > Transcend feature@embedded_data active local > Transcend feature@bookmarks enabled local > Transcend feature@filesystem_limits enabled local > Transcend feature@large_blocks enabled local > Transcend feature@large_dnode enabled local > Transcend feature@sha512 enabled local > Transcend feature@skein enabled local > Transcend feature@userobj_accounting active > local > Transcend feature@encryption active local > Transcend feature@project_quota active local > Transcend feature@device_removal enabled local > Transcend feature@obsolete_counts enabled local > Transcend feature@zpool_checkpoint enabled local > Transcend feature@spacemap_v2 active local > Transcend feature@allocation_classes enabled > local > Transcend feature@resilver_defer enabled local > Transcend feature@bookmark_v2 enabled local > Transcend feature@redaction_bookmarks enabled > local > Transcend feature@redacted_datasets enabled local > Transcend feature@bookmark_written enabled local > Transcend feature@log_spacemap active local > Transcend feature@livelist enabled local > Transcend feature@device_rebuild enabled local > Transcend feature@zstd_compress active local > root@momh167-gjp4-8570p:~ # > > > _______________________________________________ > freebsd-current@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to > "freebsd-current-unsubscribe@freebsd.org"
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