Test case: zfs_rollback_001_pos

[dinatale2]

System information

Type	Version/Name
Distribution Name	Amazon Linux
Distribution Version
Linux Kernel
Architecture	x86
ZFS Version	0.7.0-rc5
SPL Version	0.7.0-rc5

Describe the problem you're observing

zfs_rollback_001_pos occasionally fails with the error filesystem 'testpool/testfs' is already mounted cannot mount 'testpool/testfs': mountpoint or dataset is busy filesystem successfully created, but not mounted on the Amazon Linux builder.

Describe how to reproduce the problem

Reproduced by the Amazon Linux builder in buildbot.

Include any warning/errors/backtraces from the system logs

http://build.zfsonlinux.org/builders/Amazon%202015.09%20x86_64%20Release%20%28TEST%29/builds/3348/steps/shell_8/logs/log

Test: /usr/share/zfs/zfs-tests/tests/functional/cli_root/zfs_rollback/zfs_rollback_001_pos (run as root) [00:00] [FAIL]
06:55:19.06 ASSERTION: 'zfs rollback -r|-rf|-R|-Rf' will recursively destroy any  snapshots more recent than the one specified.
06:55:19.06 NOTE: Create 3 snapshots, rollback to the 2nd snapshot  using -r.
06:55:19.11 SUCCESS: zfs destroy -Rf testpool/testfs
06:55:19.12 SUCCESS: zfs destroy -Rf testpool/testvol
06:55:19.14 SUCCESS: zfs create testpool/testfs
06:55:19.18 SUCCESS: zfs set mountpoint=/var/tmp/testdir testpool/testfs
06:55:19.20 SUCCESS: zfs create -V 150m testpool/testvol
06:55:19.51 SUCCESS: eval echo y | 			newfs -v /dev/zvol/testpool/testvol > /dev/null 2>&1
06:55:19.52 SUCCESS: mount /dev/zvol/testpool/testvol /var/tmp/testdir1
06:55:19.53 SUCCESS: cp /etc/passwd /var/tmp/testdir/testfile0
06:55:19.55 SUCCESS: sync
06:55:19.56 SUCCESS: zfs snapshot testpool/testfs@testsnap
06:55:19.56 SUCCESS: cp /etc/passwd /var/tmp/testdir/testfile1
06:55:19.57 SUCCESS: sync
06:55:19.58 SUCCESS: zfs snapshot testpool/testfs@testsnap1
06:55:19.58 SUCCESS: cp /etc/passwd /var/tmp/testdir/testfile2
06:55:19.59 SUCCESS: sync
06:55:19.60 SUCCESS: zfs snapshot testpool/testfs@testsnap2
06:55:19.61 SUCCESS: cp /etc/passwd /var/tmp/testdir1/testfile0
06:55:19.61 SUCCESS: sync
06:55:19.62 SUCCESS: zfs snapshot testpool/testvol@testsnap
06:55:19.63 SUCCESS: cp /etc/passwd /var/tmp/testdir1/testfile1
06:55:19.63 SUCCESS: sync
06:55:19.64 SUCCESS: zfs snapshot testpool/testvol@testsnap1
06:55:19.65 SUCCESS: cp /etc/passwd /var/tmp/testdir1/testfile2
06:55:19.65 SUCCESS: sync
06:55:19.66 SUCCESS: zfs snapshot testpool/testvol@testsnap2
06:55:19.68 SUCCESS: zfs rollback -r testpool/testfs@testsnap1
06:55:19.68 SUCCESS: datasetexists testpool/testfs@testsnap
06:55:19.69 SUCCESS: datasetexists testpool/testfs@testsnap1
06:55:19.69 SUCCESS: datasetnonexists testpool/testfs@testsnap2
06:55:19.70 SUCCESS: datasetnonexists testpool/testfstestclone
06:55:19.70 SUCCESS: datasetnonexists testpool/testfstestclone1
06:55:19.70 SUCCESS: datasetnonexists testpool/testfstestclone2
06:55:19.71 SUCCESS: files_exist /var/tmp/testdir/testfile0 /var/tmp/testdir/testfile1
06:55:19.71 SUCCESS: files_nonexist /var/tmp/testdir/testfile2
06:55:19.75 SUCCESS: umount -f /var/tmp/testdir1
06:55:19.77 SUCCESS: zfs rollback -r testpool/testvol@testsnap1
06:55:19.79 SUCCESS: mount /dev/zvol/testpool/testvol /var/tmp/testdir1
06:55:19.79 SUCCESS: datasetexists testpool/testvol@testsnap
06:55:19.80 SUCCESS: datasetexists testpool/testvol@testsnap1
06:55:19.80 SUCCESS: datasetnonexists testpool/testvol@testsnap2
06:55:19.81 SUCCESS: datasetnonexists testpool/testvoltestclone
06:55:19.81 SUCCESS: datasetnonexists testpool/testvoltestclone1
06:55:19.81 SUCCESS: datasetnonexists testpool/testvoltestclone2
06:55:19.82 SUCCESS: files_exist /var/tmp/testdir1/testfile0 /var/tmp/testdir1/testfile1
06:55:19.82 SUCCESS: files_nonexist /var/tmp/testdir1/testfile2
06:55:19.83 NOTE: Create 3 snapshots and rollback to the 1st snapshot  using -r.
06:55:19.87 SUCCESS: zfs destroy -Rf testpool/testfs
06:55:19.90 SUCCESS: umount -f /var/tmp/testdir1
06:55:19.92 SUCCESS: zfs destroy -Rf testpool/testvol
06:55:19.95 filesystem 'testpool/testfs' is already mounted cannot mount 'testpool/testfs': mountpoint or dataset is busy filesystem successfully created, but not mounted
06:55:19.95 ERROR: zfs create testpool/testfs exited 1

[stale]

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