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{ "id": 2234914, "url": "http://patchwork.ozlabs.org/api/1.2/covers/2234914/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-ext4/cover/20260508093428.5814-1-liubaolin12138@163.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": "<20260508093428.5814-1-liubaolin12138@163.com>", "list_archive_url": null, "date": "2026-05-08T09:34:25", "name": "[v4,v4,0/3] ext4: improve mballoc statistics reporting and control", "submitter": { "id": 89479, "url": "http://patchwork.ozlabs.org/api/1.2/people/89479/?format=api", "name": "liubaolin", "email": "liubaolin12138@163.com" }, "mbox": "http://patchwork.ozlabs.org/project/linux-ext4/cover/20260508093428.5814-1-liubaolin12138@163.com/mbox/", "series": [ { "id": 503354, "url": "http://patchwork.ozlabs.org/api/1.2/series/503354/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-ext4/list/?series=503354", "date": "2026-05-08T09:34:26", "name": "ext4: improve mballoc statistics reporting and control", "version": 4, "mbox": "http://patchwork.ozlabs.org/series/503354/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/covers/2234914/comments/", "headers": { "Return-Path": "\n <SRS0=Taxf=DF=vger.kernel.org=linux-ext4+bounces-16358-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=163.com header.i=@163.com header.a=rsa-sha256\n header.s=s110527 header.b=M4+Exeuj;\n\tdkim-atps=neutral", "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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arc=none smtp.client-ip=117.135.210.4" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com;\n\ts=s110527; h=From:To:Subject:Date:Message-ID:MIME-Version; bh=7j\n\tMC6DUZiOS7Wban9FJyNbMFUdCN5d4YMh8KUY//5iA=; b=M4+ExeujLewXoQBu7a\n\tV56SwjnIvs8Gnp+V7PrOv2jzPnMSACZl4MybAVifqYnkNU3C/4VJSLD0MbiXbhVa\n\tcpcB8OIFFxLSl6w7QfusFuQYyllbtPgTyNDbNi/YcRtXGIbBG0npv7T4dIVbkH8G\n\t3wwYSzj3Nm+ehLMzuYxJlbRq8=", "From": "Baolin Liu <liubaolin12138@163.com>", "To": "tytso@mit.edu,\n\tadilger.kernel@dilger.ca,\n\tlibaokun@linux.alibaba.com", "Cc": "ojaswin@linux.ibm.com,\n\tritesh.list@gmail.com,\n\tyi.zhang@huawei.com,\n\tlinux-ext4@vger.kernel.org,\n\tlinux-kernel@vger.kernel.org,\n\twangguanyu@vivo.com,\n\tadilger@dilger.ca,\n\tliubaolin12138@163.com", "Subject": "[PATCH v4 v4 0/3] ext4: improve mballoc statistics reporting and\n control", "Date": "Fri, 8 May 2026 17:34:25 +0800", "Message-ID": "<20260508093428.5814-1-liubaolin12138@163.com>", "X-Mailer": "git-send-email 2.51.0", "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": "PSgvCgDXeCEprv1pUW9wDg--.60442S2", "X-Coremail-Antispam": "1Uf129KBjvJXoW7KF1UWF4DKw1rGr43Gw1xZrb_yoW8Xr17pF\n\tWSvw1SqFn5Zw1fJwnxGF42q343A3yfCw47Gr42g34xuF98tr1SyF4rtrWrAF98JrW0vF4U\n\tXr4jkr95CFW2yrDanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2\n\t9KBjDUYxBIdaVFxhVjvjDU0xZFpf9x0pimhF7UUUUU=", "X-CM-SenderInfo": "xolxutxrol0iasrtmqqrwthudrp/xtbC6guPWmn9riuJlAAA34", "X-Spam-Status": "No, score=-1.2 required=5.0 tests=ARC_SIGNED,ARC_VALID,\n\tDKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DMARC_PASS,\n\tFREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,\n\tMAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY\n\tautolearn=disabled version=4.0.1", "X-Spam-Checker-Version": "SpamAssassin 4.0.1 (2024-03-25) on gandalf.ozlabs.org" }, "content": "This series improves ext4 mballoc statistics reporting and control.\nCompared with v3, this version adds a new patch to convert s_mb_stats\nto atomic_t and use atomic operations for its accesses, so as to avoid\npotential concurrent accesses to this variable.\n\nPatch 3 is updated according to comments from Ted and BaoKun. Writing 0\nto /proc/fs/ext4/<dev>/mb_stats disables statistics collection, writing\n1 enables it, and writing -1 clears the current statistics and enables\ncollection. The related documentation is updated accordingly, and the\nsysfs mb_stats entry is documented as deprecated in favor of the proc\nmb_stats entry.\n\nChanges since v3:\n - add a new patch to convert s_mb_stats to atomic_t and use atomic\n operations for its accesses\n - update /proc/fs/ext4/<dev>/mb_stats write semantics based on comments\n from Ted and BaoKun\n - update related documentation and document sysfs mb_stats as deprecated\n\nBaolin Liu (3):\n ext4: add blocks_allocated to mb_stats output\n ext4: use atomic operations for s_mb_stats accesses\n ext4: allow controlling mballoc stats through proc mb_stats\n\n Documentation/ABI/testing/sysfs-fs-ext4 | 3 +-\n Documentation/admin-guide/ext4.rst | 9 +++-\n Documentation/filesystems/proc.rst | 13 +-----\n fs/ext4/ext4.h | 3 +-\n fs/ext4/mballoc.c | 57 +++++++++++++++++++------\n fs/ext4/sysfs.c | 55 ++++++++++++++++++++++--\n 6 files changed, 109 insertions(+), 31 deletions(-)" }