When running test with overlayfs and ext4 as base fs, we need to disable extent zeroout on the underlying base fs. Signed-off-by: Amir Goldstein <amir73il@xxxxxxxxx> --- Eryu, Suggestions for a cleaner approach are welcome. Thanks, Amir. tests/generic/009 | 3 +++ 1 file changed, 3 insertions(+) diff --git a/tests/generic/009 b/tests/generic/009 index fa6ef46..a4f56d0 100755 --- a/tests/generic/009 +++ b/tests/generic/009 @@ -39,6 +39,9 @@ testfile=$TEST_DIR/009.$$ if [ "$FSTYP" = "ext4" ]; then _ext4_disable_extent_zeroout fi +if [ "$FSTYP" = "overlay" -a "$OVL_BASE_FSTYP" = "ext4" ]; then + _ext4_disable_extent_zeroout "$OVL_BASE_TEST_DEV" +fi # When PAGE_SIZE > 4096 some filesystems extent layout is different so # it would not match the output. -- 2.7.4