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Sun, 15 Nov 2026 07:40:20 -0800 (PST) Received: from localhost.localdomain ([202.127.77.110]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-379558231eesm25648733eec.12.2026.11.15.07.40.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 15 Nov 2026 07:40:19 -0800 (PST) From: Heming Zhao To: joseph.qi@linux.alibaba.com, mark@fasheh.com, jlbec@evilplan.org, hch@lst.de Cc: Heming Zhao , ocfs2-devel@lists.linux.dev, linux-kernel@vger.kernel.org Subject: [RFC PATCH v6 0/3] migrate ocfs2 DIO from buffer_head to iomap Date: Sun, 15 Nov 2026 23:40:08 +0800 Message-ID: <20261115154013.9379-1-heming.zhao@suse.com> X-Mailer: git-send-email 2.55.0 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit This patch set migrates ocfs2 Direct I/O (DIO) from buffer_head mode to iomap mode. And the code base is commit 6628e7d4c6b2 (v7.4-rc1), and also merge Joseph's code and ideas from [1]: V5 changelog: - Support allocating multiple clusters at once in iomap_begin. - Use iocb as a token to detect the unwritten extent list between iomap_begin and end_io. - Squash patch [3/4] and [4/4] from v5 into a single patch (since v5 patch [4/4] consists mostly of code deletions). [1]: https://gitee.com/anolis/storage-cloud-kernel/commit/ea3fe75e2060118ba093e90b1cd34fa382914b29 [2]: https://sashiko.dev/#/patchset/20261103135605.22943-1-heming.zhao%40suse.com v1 patch set: https://lore.kernel.org/ocfs2-devel/20260724052559.15409-1-heming.zhao@suse.com/ v2 patch set: https://lore.kernel.org/ocfs2-devel/20260727061802.18485-1-heming.zhao@suse.com/ v3 patch set: https://lore.kernel.org/ocfs2-devel/20261018143319.22329-1-heming.zhao@suse.com/ v3 sashiko review: https://sashiko.dev/#/patchset/20261018143319.22329-1-heming.zhao%40suse.com v4 patch set: https://lore.kernel.org/ocfs2-devel/20261103135605.22943-1-heming.zhao@suse.com/ v4 sashiko review: https://sashiko.dev/#/patchset/20261103135605.22943-1-heming.zhao%40suse.com v5 patch set: https://lore.kernel.org/ocfs2-devel/20261105071930.16399-1-heming.zhao@suse.com/ v5 sashiko review: https://sashiko.dev/#/patchset/20261105071930.16399-1-heming.zhao%40suse.com -------------- # test report This patch set has been tested on 7.4-rc1 kernel with the following test cases. ## ltp runltp -f dio -d /mnt/ocfs2/ The failure test results: (These failures are all minor issues. I'd like to check Sashiko's review comments first before fixing them.) diotest4 3 TFAIL : diotest4.c:112: read allows odd count. returns 1: Success diotest4 4 TFAIL : diotest4.c:127: write allows odd count.returns 1: Success diotest4 5 TFAIL : diotest4.c:179: Odd count of read and write diotest4 16 TFAIL : diotest4.c:112: read allows nonaligned buf. returns 4096: Success diotest4 17 TFAIL : diotest4.c:127: write allows nonaligned buf.returns 4096: Success diotest4 18 TFAIL : diotest4.c:179: read, write with non-aligned buffer ## xfstests ./check -g quick -T -b -s ocfs2 -e generic/081 \ -e generic/266 -e generic/272 -e generic/281 \ -e generic/338 -e generic/347 -e generic/361 \ -e generic/628 -e generic/629 -e generic/648 -e generic/650 OCFS2_MKFS_LOCAL_OPT="-b 2K -C 4K --fs-features=local --fs-feature-level=max-features" Failures: generic/003 generic/056 generic/091 generic/094 generic/177 generic/211 generic/225 generic/263 generic/321 generic/322 generic/329 generic/331 generic/370 generic/376 generic/410 generic/424 generic/448 generic/467 generic/477 generic/481 generic/498 generic/510 generic/512 generic/513 generic/534 generic/537 generic/552 generic/557 generic/563 generic/578 generic/588 generic/607 generic/620 generic/630 generic/755 generic/760 generic/771 generic/777 generic/779 generic/784 Failed 40 of 632 tests OCFS2_MKFS_LOCAL_OPT="-b 4K -C 4K --fs-features=local --fs-feature-level=max-features" Failures: generic/003 generic/056 generic/177 generic/211 generic/321 generic/322 generic/329 generic/331 generic/370 generic/376 generic/420 generic/424 generic/448 generic/467 generic/477 generic/481 generic/498 generic/510 generic/512 generic/513 generic/534 generic/537 generic/552 generic/557 generic/563 generic/578 generic/588 generic/607 generic/620 generic/630 generic/755 generic/771 generic/777 generic/779 generic/784 Failed 35 of 632 tests OCFS2_MKFS_LOCAL_OPT="-b 2K -C 8K --fs-features=local --fs-feature-level=max-features" Failures: generic/003 generic/056 generic/070 generic/075 generic/076 generic/091 generic/094 generic/112 generic/177 generic/211 generic/225 generic/263 generic/319 generic/321 generic/322 generic/329 generic/331 generic/370 generic/376 generic/409 generic/410 generic/424 generic/448 generic/467 generic/477 generic/481 generic/498 generic/510 generic/512 generic/513 generic/534 generic/537 generic/552 generic/557 generic/563 generic/564 generic/578 generic/588 generic/607 generic/620 generic/630 generic/755 generic/759 generic/760 generic/771 generic/777 generic/779 generic/784 ocfs2/001 Failed 49 of 632 tests ## fio on single node The test results are similar to v5. --------------------- Heming Zhao (3): ocfs2: Add new ocfs2_map_blocks() to introduce iomap feature ocfs2: switch DIO read path from buffer_head to iomap ocfs2: switch dio write path from buffer_head to iomap fs/ocfs2/Kconfig | 2 +- fs/ocfs2/aops.c | 1532 +++++++++++++++++++++++++++++++++++----------- fs/ocfs2/aops.h | 41 +- fs/ocfs2/file.c | 220 ++++++- fs/ocfs2/mmap.c | 2 +- fs/ocfs2/ocfs2.h | 25 +- 6 files changed, 1404 insertions(+), 418 deletions(-) -- 2.55.0