From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from dggsgout12.his.huawei.com (dggsgout12.his.huawei.com [45.249.212.56]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B848412FF69; Tue, 10 Mar 2026 01:44:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.56 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773107104; cv=none; b=RaYovellaXa8AfYzu8osrmS5WEzulwomF0ykvMDCtnNQ+k3W5dfFSS3hgCYIOcJj4n3vgpFP3B/gMnLI/aTkVE1k4Nm4eDFD4BUXLWnw3ae+a7R9spr9aARg9/myhqsqnlJhlgNng6Ml1UiGssWvgDOoCAMVoopYsRJ3kNjKFfY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773107104; c=relaxed/simple; bh=B4PayEHW2MXGBNffvu1IqkKYEB3YDm1+GBYWdkx178M=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=P4jM44CrD0n798GtOp59/IpINT3TVRzDvXrJNtO7x9hBoFJMnb9xY+QVY9cIXHZm6WwFezliu/mpdUbDwgHuqb1Ab7DSY5ArF6xX2sT9euB4zGElSCJeyXl6/uZEpl0+isEcSNCBwrDeLxjCUxmlaF6I9NwvruPBu82WkFsM9h8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com; spf=none smtp.mailfrom=huaweicloud.com; arc=none smtp.client-ip=45.249.212.56 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=huaweicloud.com Received: from mail.maildlp.com (unknown [172.19.163.170]) by dggsgout12.his.huawei.com (SkyGuard) with ESMTPS id 4fVGs66gkJzKHMgK; Tue, 10 Mar 2026 09:44:42 +0800 (CST) Received: from mail02.huawei.com (unknown [10.116.40.112]) by mail.maildlp.com (Postfix) with ESMTP id 7E18740571; Tue, 10 Mar 2026 09:44:57 +0800 (CST) Received: from huaweicloud.com (unknown [10.50.85.155]) by APP1 (Coremail) with SMTP id cCh0CgB3edmQd69pXNliAQ--.11692S4; Tue, 10 Mar 2026 09:44:55 +0800 (CST) From: Zhang Yi To: linux-ext4@vger.kernel.org Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, tytso@mit.edu, adilger.kernel@dilger.ca, jack@suse.cz, ojaswin@linux.ibm.com, ritesh.list@gmail.com, libaokun@linux.alibaba.com, yi.zhang@huawei.com, yi.zhang@huaweicloud.com, yizhang089@gmail.com, yangerkun@huawei.com, yukuai@fnnas.com Subject: [PATCH 00/10] ext4: refactor partial block zero-out for iomap conversion Date: Tue, 10 Mar 2026 09:40:51 +0800 Message-ID: <20260310014101.4140698-1-yi.zhang@huaweicloud.com> X-Mailer: git-send-email 2.52.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CM-TRANSID:cCh0CgB3edmQd69pXNliAQ--.11692S4 X-Coremail-Antispam: 1UD129KBjvJXoWxZw1xtF4kCF1kJr13Kw4rKrg_yoW5XryfpF y3Cw1Y9r1xC39F9an7CF4xXw1a93WrGr48GrW7G34Du3yUZFyxCF4DK3ZY9FWjqrW7JFy8 XF4jya4UuFn8Aa7anT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUU9Y14x267AKxVW8JVW5JwAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2ocxC64kIII0Yj41l84x0c7CEw4AK67xGY2AK02 1l84ACjcxK6xIIjxv20xvE14v26w1j6s0DM28EF7xvwVC0I7IYx2IY6xkF7I0E14v26r4U JVWxJr1l84ACjcxK6I8E87Iv67AKxVW0oVCq3wA2z4x0Y4vEx4A2jsIEc7CjxVAFwI0_Gc CE3s1le2I262IYc4CY6c8Ij28IcVAaY2xG8wAqx4xG64xvF2IEw4CE5I8CrVC2j2WlYx0E 2Ix0cI8IcVAFwI0_JrI_JrylYx0Ex4A2jsIE14v26r1j6r4UMcvjeVCFs4IE7xkEbVWUJV W8JwACjcxG0xvY0x0EwIxGrwACjI8F5VA0II8E6IAqYI8I648v4I1lFIxGxcIEc7CjxVA2 Y2ka0xkIwI1lc7CjxVAaw2AFwI0_Jw0_GFyl42xK82IYc2Ij64vIr41l4I8I3I0E4IkC6x 0Yz7v_Jr0_Gr1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s026x8GjcxK67AKxVWUGVWUWwC2 zVAF1VAY17CE14v26r1q6r43MIIYrxkI7VAKI48JMIIF0xvE2Ix0cI8IcVAFwI0_Jr0_JF 4lIxAIcVC0I7IYx2IY6xkF7I0E14v26r4j6F4UMIIF0xvE42xK8VAvwI8IcIk0rVWUJVWU CwCI42IY6I8E87Iv67AKxVWUJVW8JwCI42IY6I8E87Iv6xkF7I0E14v26r4j6r4UJbIYCT nIWIevJa73UjIFyTuYvjfUFg4SDUUUU X-CM-SenderInfo: d1lo6xhdqjqx5xdzvxpfor3voofrz/ From: Zhang Yi Hello! This patch series extracted from my iomap conversion v2 series[1]. It refactors the ext4 zero partial block code path in preparation for converting buffered I/O to the iomap infrastructure. The main changes are: [1] https://lore.kernel.org/linux-ext4/20260203062523.3869120-1-yi.zhang@huawei.com/ 1. Introduce ext4_block_zero_eof(): Extend and rename ext4_block_truncate_page() to handle post-EOF partial block zeroing for both append writes and truncate operations. 2. Separate ordered data handling: Move data=ordered mode handling from __ext4_block_zero_page_range to ext4_block_zero_eof(). Only truncate and post-EOF append write/fallocate paths need ordered data mode, hole punching and zero range paths don't need ordered data handling. 3. Split journal mode handling: Extract ext4_block_journalled_zero_range() from __ext4_block_zero_page_range() for data=journal mode, leaving ext4_block_do_zero_range() for data=ordered/writeback modes. 4. Refactor ext4_alloc_file_blocks(): Change parameters to loff_t byte granularity to simplify callers and prepares removing the zero call from the allocation loop for unaligned append writes. 5. Remove handle parameters: Stop passing handle_t * to zero functions. Make ext4_block_journalled_zero_range() start its own handle, and move zero operations outside active handles. This is required because iomap uses "folio lock -> transaction start" lock ordering, opposite to the current lock ordering. 6. Centralize zeroing in ext4_write_checks(): Move all post-EOF partial block zeroing to ext4_write_checks() so it applies to both regular buffered writes and the upcoming iomap path. Thanks Yi. Zhang Yi (10): ext4: add did_zero output parameter to ext4_block_zero_page_range() ext4: ext4_block_truncate_page() returns zeroed length on success ext4: rename and extend ext4_block_truncate_page() ext4: factor out journalled block zeroing range ext4: rename ext4_block_zero_page_range() to ext4_block_zero_range() ext4: move ordered data handling out of ext4_block_do_zero_range() ext4: remove handle parameters from zero partial block functions ext4: pass allocate range as loff_t to ext4_alloc_file_blocks() ext4: move zero partial block range functions out of active handle ext4: zero post-EOF partial block before appending write fs/ext4/ext4.h | 5 +- fs/ext4/extents.c | 83 ++++++--------- fs/ext4/file.c | 14 +++ fs/ext4/inode.c | 256 ++++++++++++++++++++++++++++------------------ 4 files changed, 208 insertions(+), 150 deletions(-) -- 2.52.0