So df in btrfs is tricky at best, and relying on it for accurate information is
not great, but it's the best way to verify this test. To get around btrfs being
inconsistent sometimes just use _within_tolerance to check our new df value to
make sure that our truncate did something. With this patch I no longer see
transient failures of this test. Thanks,
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Reviewed-by: Jie Liu <jeff.liu@oracle.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
Introduce generic test 315 to verify if the disk space is
released after truncating a preallocated file back to the
old smaller size. Before Linux-3.10, Btrfs/OCFS2 test
failed in this case.
The test file is fallocated with FALLOC_FL_KEEP_SIZE option.
Signed-off-by: Jie Liu <jeff.liu@oracle.com>
Reviewed-by: Ben Myers <bpm@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
Josef Bacik
Jie Liu