linux-ext4 - A question on umounting without flushing journal

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Date:   Tue, 3 Mar 2020 11:26:13 +0100 (CET)
From:   Bo Branten <bosse@....umu.se>
To:     linux-ext4@...r.kernel.org
Subject: A question on umounting without flushing journal

Hello,

now I have another question on how to test the ext4 driver we implement 
for another os: At mount time the driver should check the journal and use 
jbd2 to replay if there is anything left in it and I would like to ask if 
there is any other methods to do an unclean umount in linux besides 
pressing reset? I would like to leave a lot of records in the journal that 
our driver can try to process?

Bo Branten