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([43.153.32.141]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-32161259329sm11923432a91.17.2025.08.10.03.15.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 10 Aug 2025 03:15:57 -0700 (PDT) From: alexjlzheng@gmail.com X-Google-Original-From: alexjlzheng@tencent.com To: brauner@kernel.org, djwong@kernel.org Cc: linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, Jinliang Zheng Subject: [PATCH v2 0/4] iomap: allow partial folio write with iomap_folio_state Date: Sun, 10 Aug 2025 18:15:50 +0800 Message-ID: <20250810101554.257060-1-alexjlzheng@tencent.com> X-Mailer: git-send-email 2.49.0 Precedence: bulk X-Mailing-List: linux-xfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Jinliang Zheng With iomap_folio_state, we can identify uptodate states at the block level, and a read_folio reading can correctly handle partially uptodate folios. Therefore, when a partial write occurs, accept the block-aligned partial write instead of rejecting the entire write. This patchset has been tested by xfstests' generic and xfs group, and there's no new failed cases compared to the lastest upstream version kernel. Changelog: V2: use & instead of % for 64 bit variable on m68k/xtensa, try to make them happy: m68k-linux-ld: fs/iomap/buffered-io.o: in function `iomap_adjust_read_range': >> buffered-io.c:(.text+0xa8a): undefined reference to `__moddi3' >> m68k-linux-ld: buffered-io.c:(.text+0xaa8): undefined reference to `__moddi3' V1: https://lore.kernel.org/linux-fsdevel/20250810044806.3433783-1-alexjlzheng@tencent.com/ Jinliang Zheng (4): iomap: make sure iomap_adjust_read_range() are aligned with block_size iomap: move iter revert case out of the unwritten branch iomap: make iomap_write_end() return the number of written length again iomap: don't abandon the whole thing with iomap_folio_state fs/iomap/buffered-io.c | 68 +++++++++++++++++++++++++++++------------- 1 file changed, 47 insertions(+), 21 deletions(-) -- 2.49.0