linux-ext4 - stat Size and Blocks numbers don't decrease after deletion

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Message-ID: <CAPXz4EPz+JVCBJ8AF3u9JKzQZk1JWZvf4oW9VVJxVTry8rJz6A@mail.gmail.com>
Date: Fri, 7 Jun 2024 09:25:02 -0700
From: Nic Bretz <bretznic@...il.com>
To: linux-ext4@...r.kernel.org
Subject: stat Size and Blocks numbers don't decrease after deletion

When I create a new directory and new files in it, I see its size and
blocks increase when running stat. After deleting all files, the size
and blocks of the directory don't decrease in stat.

I was thinking that ext4 runs defragmentation in the background and
eventually those two numbers will decrease. It looks like they don't.

Is this the intended behavior? Thanks
Nic