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test: use truncate in mk_fs()

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While the dd command actually writes to the block device the truncate
command only updates the metadata (at least on ext4). This is faster and
reduces wear on the block device.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
This commit is contained in:
Heinrich Schuchardt 2025-03-06 18:46:59 +01:00 • committed by Tom Rini
parent f1895bc1e7
commit f94a05d1c4
1 changed files with 1 additions and 1 deletions
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2
test/py/tests/fs_helper.py
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@ -54,7 +54,7 @@ def mk_fs(config, fs_type, size, prefix, src_dir=None, size_gran = 0x100000):
try: try:
check_call(f'rm -f {fs_img}', shell=True) check_call(f'rm -f {fs_img}', shell=True)
check_call(f'dd if=/dev/zero of={fs_img} bs={size_gran} count={count}', check_call(f'truncate -s $(( {size_gran} * {count} )) {fs_img}',
shell=True) shell=True)
check_call(f'mkfs.{fs_lnxtype} {mkfs_opt} {fs_img}', shell=True) check_call(f'mkfs.{fs_lnxtype} {mkfs_opt} {fs_img}', shell=True)
if fs_type == 'ext4': if fs_type == 'ext4':