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Date:   Sat, 14 Aug 2021 10:24:29 -0400
From:   "Theodore Ts'o" <>
To:     Jan Kara <>
Cc:     "Theodore Ts'o" <>, Boyang Xue <>,
Subject: Re: [PATCH] ext4: Fix tune2fs checksum failure for mounted filesystem

On Thu, 12 Aug 2021 14:47:37 +0200, Jan Kara wrote:
> Commit 81414b4dd48 ("ext4: remove redundant sb checksum recomputation")
> removed checksum recalculation after updating superblock free space /
> inode counters in ext4_fill_super() based on the fact that we will
> recalculate the checksum on superblock writeout. That is correct
> assumption but until the writeout happens (which can take a long time)
> the checksum is incorrect in the buffer cache and if tune2fs is called
> in that time window it will complain. So return back the checksum
> recalculation and add a comment explaining the tune2fs peculiarity.
> [...]

Applied, thanks!

[1/1] ext4: Fix tune2fs checksum failure for mounted filesystem
      commit: e905fbe3fd0fdb90052f6efdf88f50a78833cfe7

Best regards,
Theodore Ts'o <>

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