ZTS: avoid race to unmount in zfs_rollback_001

The zfs_rollback_001 test modifies files in a temporary, test dataset
repeatedly.  Before each iteration, any preexisting dataset is removed,
after unmounted with umount -f, if necessary.

Add a short delay after the forced unmount, avoiding a race that can
prevent zfs destroy from succeeding, leading to a test failure.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Antonio Russo <aerusso@aerusso.net>
Closes #11451
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Antonio Russo 2021-01-12 18:20:02 -07:00 committed by GitHub
parent bea3fc71ae
commit 8752f7e320
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@ -80,6 +80,7 @@ function test_n_check #opt num_snap_clone num_rollback
if datasetexists $VOL; then
if ismounted $TESTDIR1 $NEWFS_DEFAULT_FS; then
log_must umount -f $TESTDIR1
sleep 0.1
fi
log_must zfs destroy -Rf $VOL