On Tue, Aug 03, 2021 at 10:36:22AM +0530, Ritesh Harjani wrote:

On 21/08/02 12:03AM, Eryu Guan wrote:

quoted

On Wed, Jul 21, 2021 at 10:58:00AM +0530, Ritesh Harjani wrote:

quoted

ext4 with 64k blocksize (passed by user config) fails with below error for
this given test which requires dmhugedisk. Since this test anyways only
requires 4k bs, so use _mkfs_dev_blocksized() to fix this.

I don't see how this test always requires 4k blocksize, 1k blocksized
xfs also passes the test.

quoted

quoted

<error log with 64k bs>
mkfs.ext4: Input/output error while writing out and closing file system

Is this a bug in mkfs.ext4 or expected error (unsupported config)? If
it's an expected error, it'd be better to explain it in commit log as
well.

quoted

quoted

Signed-off-by: Ritesh Harjani <redacted>
---
 tests/generic/620 | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tests/generic/620 b/tests/generic/620
index b052376f..444e682d 100755
--- a/tests/generic/620
+++ b/tests/generic/620

@@ -42,7 +42,9 @@ sectors=$((2*1024*1024*1024*17))
 chunk_size=128

 _dmhugedisk_init $sectors $chunk_size
-_mkfs_dev $DMHUGEDISK_DEV
+
+# Use 4k blocksize.
+_mkfs_dev_blocksized 4096 $DMHUGEDISK_DEV

We run the test by forcing 4k blocksize, which could be tested in 4k
blocksize setup. Maybe it's another case that should _notrun in 64k
blocksize setup.

So for testing that, first I should mkfs and mount a scratch device with the
passed mount/mkfs options and then see if the blocksize passed is 64K, if yes
I should _notrun this case.

Isn't the current approach of (_mkfs_dev_blocksized 4096) is better then above
approach?

If the test always requires 4k blocksize, forcing creating a 4k
blocksize filesystem doesn't increase any test coverage, I don't see any
point introducing a new _mkfs_dev_blocksized helper just to do so.

And even if we decide to force 4k blocksize config, I think it'd be
better to update _scratch_mkfs_blocksized() to take device as argument,
like what _check_scratch_fs() does, so we don't duplicate all the code
to create fs with specified blocksize.

Thanks,
Eryu

-ritesh

quoted

Thanks,
Eryu

quoted

 _mount $DMHUGEDISK_DEV $SCRATCH_MNT || _fail "mount failed for $DMHUGEDISK_DEV $SCRATCH_MNT"
 testfile=$SCRATCH_MNT/testfile-$seq

--
2.31.1