linux-ext4 - Re: [PATCH v2] ext4: allow concurrent unaligned dio overwrites

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Message-Id: <168683994075.282246.17689753653419770593.b4-ty@mit.edu>
Date:   Thu, 15 Jun 2023 10:59:52 -0400
From:   "Theodore Ts'o" <tytso@....edu>
To:     linux-ext4@...r.kernel.org, Brian Foster <bfoster@...hat.com>
Cc:     "Theodore Ts'o" <tytso@....edu>,
        Ritesh Harjani <ritesh.list@...il.com>, Jan Kara <jack@...e.cz>
Subject: Re: [PATCH v2] ext4: allow concurrent unaligned dio overwrites


On Tue, 14 Mar 2023 09:07:59 -0400, Brian Foster wrote:
> We've had reports of significant performance regression of sub-block
> (unaligned) direct writes due to the added exclusivity restrictions
> in ext4. The purpose of the exclusivity requirement for unaligned
> direct writes is to avoid data corruption caused by unserialized
> partial block zeroing in the iomap dio layer across overlapping
> writes.
> 
> [...]

Applied, thanks!

[1/1] ext4: allow concurrent unaligned dio overwrites
      commit: d3dfa834d0c6c6a168a745185fe6a64c901c186f

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