On Wed, May 12, 2021 at 3:55 PM Petr Vorel [off-list ref] wrote:

Hi,

[Cc Jan]

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Hi!

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/etc/mke2fs.conf will use 1024 block size for small filesystems, which are
between 3M and 512M. However, on recent versions of Ubuntu, this
configuration has changed and thet default blocksize is 4096 even for small
filesystems.

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Force the blocksize to 1024 on ext3 and ext4 filesystems, which will lead
to the expected results, as journals will take only 1M.

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IMHO it'd be better to keep the default, because that covers what end users
actually use.

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One alternative to forcing the block size is accouting for the journal blocks,
but, then, that needs to consider the block size. I think my approach is more
simple. We could restrict it to the smaller 16M filesystem, though.

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What do you think?

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I guess that we should merge your fix in order to have the test working
for the upcomming release. Then we can discuss if this should be fixed
differently or not.

Acked-by: Petr Vorel <pvorel@suse.cz>

Fine by me (I don't have a better idea atm.)

Kind regards,
Petr