On some old kernel(e.g. v3.5), this case fails because it can not create
extent_max_zeroout_kb file, as below:
Silence is golden
+./tests/generic/448: line 54: /sys/fs/ext4/sda5/extent_max_zeroout_kb: No such file or directory
seek sanity check failed!
The extent_max_zeroout_kb file is introduced by:
67a5da564f97('ext4: make the zero-out chunk size tunable')
We should only disable extent zeroing when extent_max_zeroout_kb is supported.
Signed-off-by: Xiao Yang <yangx.jy@xxxxxxxxxxxxxx>
---
tests/generic/448 | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/tests/generic/448 b/tests/generic/448
index 87b99d7..3e92742 100755
--- a/tests/generic/448
+++ b/tests/generic/448
@@ -51,7 +51,8 @@ _require_test_program "seek_sanity_test"
# Disable extent zeroing for ext4 as that change where holes are created
if [ "$FSTYP" = "ext4" ]; then
DEV=`_short_dev $TEST_DEV`
- echo 0 >/sys/fs/ext4/$DEV/extent_max_zeroout_kb
+ [ -f /sys/fs/ext4/$DEV/extent_max_zeroout_kb ] \
+ && echo 0 >/sys/fs/ext4/$DEV/extent_max_zeroout_kb
fi
$here/src/seek_sanity_test -s 18 -e 18 $BASE_TEST_FILE > $seqres.full 2>&1 ||
--
1.8.3.1
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