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GET /api/patches/2226019/?format=api
{ "id": 2226019, "url": "http://patchwork.ozlabs.org/api/patches/2226019/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-ext4/patch/20260422021042.4157510-7-yi.zhang@huaweicloud.com/", "project": { "id": 8, "url": "http://patchwork.ozlabs.org/api/projects/8/?format=api", "name": "Linux ext4 filesystem development", "link_name": "linux-ext4", "list_id": "linux-ext4.vger.kernel.org", "list_email": "linux-ext4@vger.kernel.org", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260422021042.4157510-7-yi.zhang@huaweicloud.com>", "list_archive_url": null, "date": "2026-04-22T02:10:26", "name": "[v3,06/22] ext4: pass out extent seq counter when mapping da blocks", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "4950321adc97f9f6976188f47c0293e2c5081a78", "submitter": { "id": 85428, "url": "http://patchwork.ozlabs.org/api/people/85428/?format=api", "name": "Zhang Yi", "email": "yi.zhang@huaweicloud.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-ext4/patch/20260422021042.4157510-7-yi.zhang@huaweicloud.com/mbox/", "series": [ { "id": 500911, "url": "http://patchwork.ozlabs.org/api/series/500911/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-ext4/list/?series=500911", "date": "2026-04-22T02:10:23", "name": "ext4: use iomap for regular file's buffered I/O path", "version": 3, "mbox": "http://patchwork.ozlabs.org/series/500911/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2226019/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2226019/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <SRS0=JB8N=CV=vger.kernel.org=linux-ext4+bounces-15984-patchwork-incoming=ozlabs.org@ozlabs.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linux-ext4@vger.kernel.org" ], "Delivered-To": [ "patchwork-incoming@legolas.ozlabs.org", "patchwork-incoming@ozlabs.org" ], "Authentication-Results": [ "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=ozlabs.org\n (client-ip=2404:9400:2221:ea00::3; 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a=rsa-sha256; d=subspace.kernel.org;\n\ts=arc-20240116; t=1776824228; c=relaxed/simple;\n\tbh=LSueVWoJnsscuVIREEDByNIXpfqsPJMkD635NnFcnwE=;\n\th=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References:\n\t MIME-Version;\n b=WoadY5RmwKCPcStbAGK21nEac/brzNx4CYwD9J6aNEveFqrYFQ/sB3Z6exfR9M0/sV4N9x4IxzwyTxb6DAO0SGWofv+ShmehAiQvB9qQuIlgwD2zlAKFqx7yZPImSrLRMqaqYNUMxjR1jAznOtJoenMk9U/uEqayFfi9w1h3Jak=" ], "ARC-Authentication-Results": [ "i=2; gandalf.ozlabs.org;\n dmarc=none (p=none dis=none) header.from=huaweicloud.com;\n spf=pass (client-ip=172.105.105.114; helo=tor.lore.kernel.org;\n envelope-from=linux-ext4+bounces-15984-patchwork-incoming=ozlabs.org@vger.kernel.org;\n receiver=ozlabs.org) smtp.mailfrom=vger.kernel.org", "i=1; smtp.subspace.kernel.org;\n dmarc=none (p=none dis=none) header.from=huaweicloud.com;\n spf=pass smtp.mailfrom=huaweicloud.com; arc=none smtp.client-ip=45.249.212.56" ], "From": "Zhang Yi <yi.zhang@huaweicloud.com>", "To": "linux-ext4@vger.kernel.org,\n\tlinux-fsdevel@vger.kernel.org", "Cc": "linux-kernel@vger.kernel.org,\n\ttytso@mit.edu,\n\tadilger.kernel@dilger.ca,\n\tlibaokun@linux.alibaba.com,\n\tjack@suse.cz,\n\tojaswin@linux.ibm.com,\n\tritesh.list@gmail.com,\n\tdjwong@kernel.org,\n\thch@infradead.org,\n\tyi.zhang@huawei.com,\n\tyi.zhang@huaweicloud.com,\n\tyizhang089@gmail.com,\n\tyangerkun@huawei.com,\n\tyukuai@fnnas.com", "Subject": "[PATCH v3 06/22] ext4: pass out extent seq counter when mapping da\n blocks", "Date": "Wed, 22 Apr 2026 10:10:26 +0800", "Message-ID": "<20260422021042.4157510-7-yi.zhang@huaweicloud.com>", "X-Mailer": "git-send-email 2.52.0", "In-Reply-To": "<20260422021042.4157510-1-yi.zhang@huaweicloud.com>", "References": "<20260422021042.4157510-1-yi.zhang@huaweicloud.com>", "Precedence": "bulk", "X-Mailing-List": "linux-ext4@vger.kernel.org", "List-Id": "<linux-ext4.vger.kernel.org>", "List-Subscribe": "<mailto:linux-ext4+subscribe@vger.kernel.org>", "List-Unsubscribe": "<mailto:linux-ext4+unsubscribe@vger.kernel.org>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-CM-TRANSID": "_Ch0CgB3JL6PL+hpqkgUBQ--.2635S10", "X-Coremail-Antispam": "1UD129KBjvJXoW7tF1ftFWDJr48AF4xKw1kuFg_yoW8Cr15p3\n\t9YkF1rGw18Zw1q9ay8X3W7ZFyrKan8ArW7GrWfXw1j9a4DWFySqF4jkF17AFykKr4xXr1F\n\tvF48CryUC3ySkFDanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2\n\t9KBjDU0xBIdaVrnRJUUUmS14x267AKxVWrJVCq3wAFc2x0x2IEx4CE42xK8VAvwI8IcIk0\n\trVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2048vs2IY020E87I2jVAFwI0_JF0E3s1l82xGYI\n\tkIc2x26xkF7I0E14v26ryj6s0DM28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8wA2\n\tz4x0Y4vE2Ix0cI8IcVAFwI0_tr0E3s1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr1j6F\n\t4UJwA2z4x0Y4vEx4A2jsIE14v26rxl6s0DM28EF7xvwVC2z280aVCY1x0267AKxVW0oVCq\n\t3wAS0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0I7\n\tIYx2IY67AKxVWUGVWUXwAv7VC2z280aVAFwI0_Jr0_Gr1lOx8S6xCaFVCjc4AY6r1j6r4U\n\tM4x0Y48IcxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2IErcIFxwACI402YVCY1x02628vn2\n\tkIc2xKxwCY1x0262kKe7AKxVWUtVW8ZwCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkE\n\tbVWUJVW8JwC20s026c02F40E14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67\n\tAF67kF1VAFwI0_GFv_WrylIxkGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVWUCVW8JwCI\n\t42IY6xIIjxv20xvEc7CjxVAFwI0_Gr1j6F4UJwCI42IY6xAIw20EY4v20xvaj40_Jr0_JF\n\t4lIxAIcVC2z280aVAFwI0_Jr0_Gr1lIxAIcVC2z280aVCY1x0267AKxVW8Jr0_Cr1UYxBI\n\tdaVFxhVjvjDU0xZFpf9x0JUWMKtUUUUU=", "X-CM-SenderInfo": "d1lo6xhdqjqx5xdzvxpfor3voofrz/", "X-Spam-Status": "No, score=-1.1 required=5.0 tests=ARC_SIGNED,ARC_VALID,\n\tDMARC_MISSING,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,\n\tSPF_HELO_NONE,SPF_PASS autolearn=disabled version=4.0.1", "X-Spam-Checker-Version": "SpamAssassin 4.0.1 (2024-03-25) on gandalf.ozlabs.org" }, "content": "From: Zhang Yi <yi.zhang@huawei.com>\n\nThe iomap buffered write path does not hold any locks between querying\ninode extent mapping information and performing buffered writes. It\nrelies on the sequence counter saved in the inode to detect stale\nmappings.\n\nCommit 07c440e8da8f (\"ext4: pass out extent seq counter when mapping\nblocks\") added the m_seq field to ext4_map_blocks to pass out extent\nsequence numbers, but it missed two callsites within\next4_da_map_blocks(). These callsites are on the delayed allocation\npath, which is also used in the iomap buffered write path. Pass out the\nsequence counter to ensure stale mappings can be detected.\n\nSigned-off-by: Zhang Yi <yi.zhang@huawei.com>\n---\n fs/ext4/inode.c | 4 ++--\n 1 file changed, 2 insertions(+), 2 deletions(-)", "diff": "diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c\nindex df21f6870ec4..5ffd6aeb3485 100644\n--- a/fs/ext4/inode.c\n+++ b/fs/ext4/inode.c\n@@ -1929,7 +1929,7 @@ static int ext4_da_map_blocks(struct inode *inode, struct ext4_map_blocks *map)\n \text4_check_map_extents_env(inode);\n \n \t/* Lookup extent status tree firstly */\n-\tif (ext4_es_lookup_extent(inode, map->m_lblk, NULL, &es, NULL)) {\n+\tif (ext4_es_lookup_extent(inode, map->m_lblk, NULL, &es, &map->m_seq)) {\n \t\tmap->m_len = min_t(unsigned int, map->m_len,\n \t\t\t\t es.es_len - (map->m_lblk - es.es_lblk));\n \n@@ -1982,7 +1982,7 @@ static int ext4_da_map_blocks(struct inode *inode, struct ext4_map_blocks *map)\n \t * is held in write mode, before inserting a new da entry in\n \t * the extent status tree.\n \t */\n-\tif (ext4_es_lookup_extent(inode, map->m_lblk, NULL, &es, NULL)) {\n+\tif (ext4_es_lookup_extent(inode, map->m_lblk, NULL, &es, &map->m_seq)) {\n \t\tmap->m_len = min_t(unsigned int, map->m_len,\n \t\t\t\t es.es_len - (map->m_lblk - es.es_lblk));\n \n", "prefixes": [ "v3", "06/22" ] }