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xfstests: generic/315, verify preallocated disk space is released per truncate

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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>
This commit is contained in:
Jie Liu
2013-07-01 18:29:19 +08:00
committed by Ben Myers
parent b7ff5113a7
commit 6fe0ad6faf
3 changed files with 82 additions and 0 deletions
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tests/generic/315.out
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QA output created by 315
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