On Mon, 23 Aug 2021 14:13:58 +0800, Jeffle Xu wrote:

When ext4_insert_delayed block receives and recovers from an error from
ext4_es_insert_delayed_block(), e.g., ENOMEM, it does not release the
space it has reserved for that block insertion as it should. One effect
of this bug is that s_dirtyclusters_counter is not decremented and
remains incorrectly elevated until the file system has been unmounted.
This can result in premature ENOSPC returns and apparent loss of free
space.

[...]

Applied, thanks!

[1/1] ext4: fix reserved space counter leakage
      commit: 8ec5146a46609a89658e5dc9bc40b70ce70ef43b

Best regards,
-- 
Theodore Ts'o [off-list ref]