Re: [PATCH] jbd2: fix off-by-one while erasing journal

[Theodore Ts'o]

On Mon, 17 Feb 2025 14:59:55 +0800, Zhang Yi wrote:
> In __jbd2_journal_erase(), the block_stop parameter includes the last
> block of a contiguous region; however, the calculation of byte_stop is
> incorrect, as it does not account for the bytes in that last block.
> Consequently, the page cache is not cleared properly, which occasionally
> causes the ext4/050 test to fail.
> 
> Since block_stop operates on inclusion semantics, it involves repeated
> increments and decrements by 1, significantly increasing the complexity
> of the calculations. Optimize the calculation and fix the incorrect
> byte_stop by make both block_stop and byte_stop to use exclusion
> semantics.
> 
> [...]

Applied, thanks!

[1/1] jbd2: fix off-by-one while erasing journal
      commit: f0b48ab02c624d12643c4dbe62ec4c78789592de

Best regards,
-- 
Theodore Ts'o <tytso@xxxxxxx>