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GET /api/1.2/patches/2234981/?format=api
{ "id": 2234981, "url": "http://patchwork.ozlabs.org/api/1.2/patches/2234981/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-ext4/patch/20260508121539.4174601-11-libaokun@linux.alibaba.com/", "project": { "id": 8, "url": "http://patchwork.ozlabs.org/api/1.2/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": "<20260508121539.4174601-11-libaokun@linux.alibaba.com>", "list_archive_url": null, "date": "2026-05-08T12:15:32", "name": "[RFC,10/17] ext4: use fast incremental CRC update in ext4_free_inode()", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "ad5d82c28095f0751da4d6d2bdbed6c645b55e33", "submitter": { "id": 92757, "url": "http://patchwork.ozlabs.org/api/1.2/people/92757/?format=api", "name": "Baokun Li", "email": "libaokun@linux.alibaba.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-ext4/patch/20260508121539.4174601-11-libaokun@linux.alibaba.com/mbox/", "series": [ { "id": 503377, "url": "http://patchwork.ozlabs.org/api/1.2/series/503377/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-ext4/list/?series=503377", "date": "2026-05-08T12:15:22", "name": "ext4/lib-crc: LBS performance part 1 - incremental CRC32c for bitmap checksums", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/503377/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2234981/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2234981/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <SRS0=GbWF=DF=vger.kernel.org=linux-ext4+bounces-16372-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\tdkim=pass (1024-bit key;\n unprotected) header.d=linux.alibaba.com header.i=@linux.alibaba.com\n header.a=rsa-sha256 header.s=default header.b=h3SnqpWM;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=ozlabs.org\n (client-ip=150.107.74.76; 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a=rsa-sha256; c=relaxed/relaxed;\n\td=linux.alibaba.com; s=default;\n\tt=1778242568; h=From:To:Subject:Date:Message-ID:MIME-Version;\n\tbh=Rlokru3c3o+OyN0sDITif8sT6fm26WlVenfbU5I/VP4=;\n\tb=h3SnqpWMoVMXg0B4ZK3CW/6o5zc+4q+1JwvmR2qmtL+l7myx0l/RzZhKDFwcFIzU96g9gF1ldg9Mwiz+5GjV5Zu5wNy0F+XRpb6YRYtAeUwKlBxNfz7uTuWjtl4bGcDd6RLhBlBe8IYV0p9Cvxm1144SMG8jDkQnbp9eTip/7RM=", "X-Alimail-AntiSpam": "\n AC=PASS;BC=-1|-1;BR=01201311R841e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=maildocker-contentspam033037033178;MF=libaokun@linux.alibaba.com;NM=1;PH=DS;RN=11;SR=0;TI=SMTPD_---0X2XQgqK_1778242567;", "From": "Baokun Li <libaokun@linux.alibaba.com>", "To": "linux-ext4@vger.kernel.org", "Cc": "linux-crypto@vger.kernel.org,\n\tebiggers@kernel.org,\n\tardb@kernel.org,\n\ttytso@mit.edu,\n\tadilger.kernel@dilger.ca,\n\tjack@suse.cz,\n\tyi.zhang@huawei.com,\n\tojaswin@linux.ibm.com,\n\tritesh.list@gmail.com,\n\tBaokun Li <libaokun@linux.alibaba.com>", "Subject": "[PATCH RFC 10/17] ext4: use fast incremental CRC update in\n ext4_free_inode()", "Date": "Fri, 8 May 2026 20:15:32 +0800", "Message-ID": "<20260508121539.4174601-11-libaokun@linux.alibaba.com>", "X-Mailer": "git-send-email 2.43.7", "In-Reply-To": "<20260508121539.4174601-1-libaokun@linux.alibaba.com>", "References": "<20260508121539.4174601-1-libaokun@linux.alibaba.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-Spam-Status": "No, score=-8.7 required=5.0 tests=ARC_SIGNED,ARC_VALID,\n\tDKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DMARC_PASS,\n\tHEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,\n\tSPF_PASS,UNPARSEABLE_RELAY,USER_IN_DEF_DKIM_WL autolearn=disabled\n\tversion=4.0.1", "X-Spam-Checker-Version": "SpamAssassin 4.0.1 (2024-03-25) on gandalf.ozlabs.org" }, "content": "Replace ext4_inode_bitmap_csum_set() with the newly added\next4_inode_bitmap_csum_set_fast() in ext4_free_inode() for incremental\ninode bitmap checksum update.\n\nThis is safe because:\n - At inode free time, the inode bitmap checksum has already been\n initialized, so the old checksum is always valid.\n - The bitmap buffer modification and checksum update are protected\n by the same group lock, ensuring the old checksum is consistent\n with the bitmap content before the bit flip.\n\nSigned-off-by: Baokun Li <libaokun@linux.alibaba.com>\n---\n fs/ext4/ialloc.c | 2 +-\n 1 file changed, 1 insertion(+), 1 deletion(-)", "diff": "diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c\nindex 3fd8f0099852..55eb69fbb4c9 100644\n--- a/fs/ext4/ialloc.c\n+++ b/fs/ext4/ialloc.c\n@@ -327,7 +327,7 @@ void ext4_free_inode(handle_t *handle, struct inode *inode)\n \t\tif (percpu_counter_initialized(&sbi->s_dirs_counter))\n \t\t\tpercpu_counter_dec(&sbi->s_dirs_counter);\n \t}\n-\text4_inode_bitmap_csum_set(sb, gdp, bitmap_bh);\n+\text4_inode_bitmap_csum_set_fast(sb, gdp, bit);\n \text4_group_desc_csum_set(sb, block_group, gdp);\n \text4_unlock_group(sb, block_group);\n \n", "prefixes": [ "RFC", "10/17" ] }