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From: Li Chen <me@linux.beauty>
To: Theodore Ts'o <tytso@mit.edu>, Jan Kara <jack@suse.com>,
	Mark Fasheh <mark@fasheh.com>,
	linux-ext4@vger.kernel.org, ocfs2-devel@lists.linux.dev
Cc: Andreas Dilger <adilger.kernel@dilger.ca>,
	Joel Becker <jlbec@evilplan.org>,
	Joseph Qi <joseph.qi@linux.alibaba.com>,
	linux-kernel@vger.kernel.org
Subject: [PATCH 0/3] jbd2/ext4/ocfs2: READ_ONCE for lockless jinode reads
Date: Fri, 30 Jan 2026 11:12:29 +0800	[thread overview]
Message-ID: <20260130031232.60780-1-me@linux.beauty> (raw)

This series adds READ_ONCE() for existing lockless reads of
jbd2_inode fields in jbd2 and filesystem callbacks used by ext4 and ocfs2.

This is based on Jan's suggestion in the review of the ext4 jinode
publication race fix. [1]

[1]: https://lore.kernel.org/all/4jxwogttddiaoqbstlgou5ox6zs27ngjjz5ukrxafm2z5ijxod@so4eqnykiegj/

Thanks,
Li

Li Chen (3):
  jbd2: use READ_ONCE for lockless jinode reads
  ext4: use READ_ONCE for lockless jinode reads
  ocfs2: use READ_ONCE for lockless jinode reads

 fs/ext4/inode.c       |  6 ++++--
 fs/ext4/super.c       | 13 ++++++++-----
 fs/jbd2/commit.c      | 39 ++++++++++++++++++++++++++++++++-------
 fs/jbd2/transaction.c |  2 +-
 fs/ocfs2/journal.c    |  7 +++++--
 5 files changed, 50 insertions(+), 17 deletions(-)

-- 
2.52.0

             reply	other threads:[~2026-01-30  3:13 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-01-30  3:12 Li Chen [this message]
2026-01-30  3:12 ` [PATCH 1/3] jbd2: use READ_ONCE for lockless jinode reads Li Chen
2026-02-02 16:40   ` Jan Kara
2026-02-02 16:52     ` Jan Kara
2026-01-30  3:12 ` [PATCH 2/3] ext4: " Li Chen
2026-02-02 16:41   ` Jan Kara
2026-01-30  3:12 ` [PATCH 3/3] ocfs2: " Li Chen
2026-01-30  5:27   ` Matthew Wilcox
2026-01-30 12:26     ` Li Chen
2026-01-30 16:36       ` Matthew Wilcox
2026-02-01  4:37         ` Li Chen
2026-02-02 17:17         ` Jan Kara
2026-02-03 12:10           ` Li Chen
2026-02-03 12:37             ` Jan Kara

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