linux-ext4 - Re: [RFC PATCH v2] ext4: dio take shared inode lock when overwriting preallocated blocks

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Message-Id: <167678522161.2723470.15996894909319894248.b4-ty@mit.edu>
Date:   Sun, 19 Feb 2023 00:40:53 -0500
From:   "Theodore Ts'o" <tytso@....edu>
To:     linux-ext4@...r.kernel.org, Zhang Yi <yi.zhang@...weicloud.com>
Cc:     "Theodore Ts'o" <tytso@....edu>, yi.zhang@...wei.com,
        yukuai3@...wei.com, adilger.kernel@...ger.ca, jack@...e.cz
Subject: Re: [RFC PATCH v2] ext4: dio take shared inode lock when overwriting preallocated blocks

On Mon, 26 Dec 2022 14:20:15 +0800, Zhang Yi wrote:
> From: Zhang Yi <yi.zhang@...wei.com>
> 
> In the dio write path, we only take shared inode lock for the case of
> aligned overwriting initialized blocks inside EOF. But for overwriting
> preallocated blocks, it may only need to split unwritten extents, this
> procedure has been protected under i_data_sem lock, it's safe to
> release the exclusive inode lock and take shared inode lock.
> 
> [...]

Applied, thanks!

[1/1] ext4: dio take shared inode lock when overwriting preallocated blocks
      commit: 240930fb7e6b52229bdee5b1423bfeab0002fed2

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