Patch Detail
get:
Show a patch.
patch:
Update a patch.
put:
Update a patch.
GET /api/1.0/patches/2223063/?format=api
{ "id": 2223063, "url": "http://patchwork.ozlabs.org/api/1.0/patches/2223063/?format=api", "project": { "id": 8, "url": "http://patchwork.ozlabs.org/api/1.0/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 }, "msgid": "<20260414100212.95209-1-liubaolin12138@163.com>", "date": "2026-04-14T10:02:11", "name": "[v1] ext4: add mb_stats_clear for mballoc statistics", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "314b46f89b00508b0b33ebf300f9ebee7334543e", "submitter": { "id": 89479, "url": "http://patchwork.ozlabs.org/api/1.0/people/89479/?format=api", "name": "liubaolin", "email": "liubaolin12138@163.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-ext4/patch/20260414100212.95209-1-liubaolin12138@163.com/mbox/", "series": [ { "id": 499811, "url": "http://patchwork.ozlabs.org/api/1.0/series/499811/?format=api", "date": "2026-04-14T10:02:11", "name": "[v1] ext4: add mb_stats_clear for mballoc statistics", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/499811/mbox/" } ], "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2223063/checks/", "tags": {}, "headers": { "Return-Path": "\n <SRS0=2OWz=CN=vger.kernel.org=linux-ext4+bounces-15829-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=Lns44EO5;\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; helo=mail.ozlabs.org;\n envelope-from=srs0=2owz=cn=vger.kernel.org=linux-ext4+bounces-15829-patchwork-incoming=ozlabs.org@ozlabs.org;\n receiver=patchwork.ozlabs.org)", "gandalf.ozlabs.org;\n arc=pass smtp.remote-ip=172.105.105.114 arc.chain=subspace.kernel.org", "gandalf.ozlabs.org;\n dmarc=pass (p=none dis=none) header.from=163.com", "gandalf.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=Lns44EO5;\n\tdkim-atps=neutral", "gandalf.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=172.105.105.114; helo=tor.lore.kernel.org;\n envelope-from=linux-ext4+bounces-15829-patchwork-incoming=ozlabs.org@vger.kernel.org;\n receiver=ozlabs.org)", "smtp.subspace.kernel.org;\n\tdkim=pass (1024-bit key) header.d=163.com header.i=@163.com\n header.b=\"Lns44EO5\"", "smtp.subspace.kernel.org;\n arc=none smtp.client-ip=220.197.31.3", "smtp.subspace.kernel.org;\n dmarc=pass (p=none dis=none) header.from=163.com", "smtp.subspace.kernel.org;\n spf=pass smtp.mailfrom=163.com" ], "Received": [ "from mail.ozlabs.org (mail.ozlabs.org [IPv6:2404:9400:2221:ea00::3])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519 server-signature ECDSA (secp384r1 raw public key)\n server-digest SHA384)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fw0KP1qnZz1y2d\n\tfor <incoming@patchwork.ozlabs.org>; Tue, 14 Apr 2026 20:06:00 +1000 (AEST)", "from mail.ozlabs.org (mail.ozlabs.org [IPv6:2404:9400:2221:ea00::3])\n\tby gandalf.ozlabs.org (Postfix) with ESMTP id 4fw0KM5Pzpz4w26\n\tfor <incoming@patchwork.ozlabs.org>; Tue, 14 Apr 2026 20:05:59 +1000 (AEST)", "by gandalf.ozlabs.org (Postfix)\n\tid 4fw0KM5Lblz4wK5; Tue, 14 Apr 2026 20:05:59 +1000 (AEST)", "from tor.lore.kernel.org (tor.lore.kernel.org [172.105.105.114])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519)\n\t(No client certificate requested)\n\tby gandalf.ozlabs.org (Postfix) with ESMTPS id 4fw0KG7587z4w26\n\tfor <patchwork-incoming@ozlabs.org>; Tue, 14 Apr 2026 20:05:54 +1000 (AEST)", "from smtp.subspace.kernel.org (conduit.subspace.kernel.org\n [100.90.174.1])\n\tby tor.lore.kernel.org (Postfix) with ESMTP id D19D930565AB\n\tfor <patchwork-incoming@ozlabs.org>; Tue, 14 Apr 2026 10:02:47 +0000 (UTC)", "from localhost.localdomain (localhost.localdomain [127.0.0.1])\n\tby smtp.subspace.kernel.org (Postfix) with ESMTP id 88B223AC0FC;\n\tTue, 14 Apr 2026 10:02:46 +0000 (UTC)", "from m16.mail.163.com (m16.mail.163.com [220.197.31.3])\n\t(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby smtp.subspace.kernel.org (Postfix) with ESMTPS id 3B9313A0E80;\n\tTue, 14 Apr 2026 10:02:41 +0000 (UTC)", "from liubaolin-VMware-Virtual-Platform.localdomain (unknown [])\n\tby gzga-smtp-mtada-g0-3 (Coremail) with SMTP id\n _____wBHq46oEN5pKQJTFA--.6735S2;\n\tTue, 14 Apr 2026 18:02:18 +0800 (CST)" ], "ARC-Seal": [ "i=2; a=rsa-sha256; d=ozlabs.org; s=201707; t=1776161159; cv=pass;\n\tb=lnSTLCkhJuwPbVAsQa7oEb1CDNT8ERP6B9h5qSKJ8BHTv4yBbmElcajsvDxiTwpOIg8aCxYMteUufdlWwAuALJ5JKdwNWtmoiRXl/BKSUGwo0A+g8BQR8jH9a4pVPrLqZ6CzMOTLv5/yDFL9rrEjhnnPP2on8Rds4OUxTf5GCgp31Q9TKaHRk/3VaCoZxEoIC05ZoTM25xCULsTPBcvgCdrEX8m3MJf1XGkANOssZ5Xndy3a37S/ocVwKs4kVjHoZRoQ/aleL523GAB18c+AFMbcaFTz5cwAOV40WIQ5KmhTZXhouZ3mMHZlTY8B36dF+bV5YzSQQqPReoF+P1kNPg==", "i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116;\n\tt=1776160966; cv=none;\n b=G8pcUYxYDDwh7Pb26Psy1rUJVmf0fPKncTEzhA98O6Tm3w7jlNNlOnd1b2J7BD1odfxvaITbJWADs8griNI7Qsc7AyaKm54rF/YSMSqSzFLMf+3FTJ7prgAg4F3YVBJ6tdyHYauHF9KtfTmge8RPSwfEuHhyge7RBrNfLrvjGq4=" ], "ARC-Message-Signature": [ "i=2; a=rsa-sha256; d=ozlabs.org; s=201707;\n\tt=1776161159; c=relaxed/relaxed;\n\tbh=yyy/TZVRqdIC6eQ1z8Fb/qwWijS+XhBLAucbRi6wwV4=;\n\th=From:To:Cc:Subject:Date:Message-ID:MIME-Version;\n b=j4gr/mBSNSg5hdAENmihKRz60gUkgwNF8c7bgN7nvdE3WNi2W2Asb2SrhiWzkx7ixeuLjIZG6rYreoqaZQ44jD96UksQWl/2BI6F2LvBWOJfMtvHDZ7qu2YZffL/svNspPON1xs5E71uscuj9tOuCa6Q+O0LdZ6RNpfnIxDgXgP82RmgOByjBo+NvbTp2825QZaYivNkRy5fWl2913EqZobDLJY1tFO2oiDi1Co3rWjFi14UOpbyDHv6TB1o6yThEOvtJlHH9AsB9PNlKWGCV27ILdaT7hE66U+28fyqsiPz15IuUJhXNCiJyzYrFMbS2ITYkMhuqIGi2lN8dkoVMQ==", "i=1; a=rsa-sha256; d=subspace.kernel.org;\n\ts=arc-20240116; t=1776160966; c=relaxed/simple;\n\tbh=KyqrBXVYLfJJSb1WEZR8VWMn4NIt3wjCro8IRsR3OpM=;\n\th=From:To:Cc:Subject:Date:Message-ID:MIME-Version;\n b=SRlbiJhj6nHZ6OEPw4m50QiDtFzZtJi3efsLEohRG2YYXj15zCgUtyYS8pglAgu6/G/Hf1b0nZoUAMvyBHcZ1wON7omt4esw3b2H1nr5LUttjxShLkY8NFulRIzkAeoYR2vl4ZjhTWWYHMGrHraqgDQUQ25BlzIFYT0Kd/UyfRc=" ], "ARC-Authentication-Results": [ "i=2; gandalf.ozlabs.org;\n dmarc=pass (p=none dis=none) header.from=163.com; dkim=pass (1024-bit key;\n unprotected) header.d=163.com header.i=@163.com header.a=rsa-sha256\n header.s=s110527 header.b=Lns44EO5; dkim-atps=neutral;\n spf=pass (client-ip=172.105.105.114; helo=tor.lore.kernel.org;\n envelope-from=linux-ext4+bounces-15829-patchwork-incoming=ozlabs.org@vger.kernel.org;\n receiver=ozlabs.org) smtp.mailfrom=vger.kernel.org", "i=1; smtp.subspace.kernel.org;\n dmarc=pass (p=none dis=none) header.from=163.com;\n spf=pass smtp.mailfrom=163.com;\n dkim=pass (1024-bit key) header.d=163.com header.i=@163.com\n header.b=Lns44EO5; arc=none smtp.client-ip=220.197.31.3" ], "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=yy\n\ty/TZVRqdIC6eQ1z8Fb/qwWijS+XhBLAucbRi6wwV4=; b=Lns44EO5FOJ7Uulitn\n\t2/Aa6ykIAlx1lGkGNR+mSPuXT75M0n2V5OrEIf001jz9/9wa+m0fNdxjYnJ5nGht\n\tCZ0IVGg92EJBInAr/H+hmDAye77q00+Ru6x5MyBSsXcuNyX3ITpPURlmXFNfpRZg\n\tUm2Sue3E+kAfii2K2kwMlEIJE=", "From": "Baolin Liu <liubaolin12138@163.com>", "To": "tytso@mit.edu,\n\tadilger.kernel@dilger.ca", "Cc": "liubaolin12138@163.com,\n\tlinux-ext4@vger.kernel.org,\n\tlinux-kernel@vger.kernel.org,\n\twangguanyu@vivo.com,\n\tBaolin Liu <liubaolin@kylinos.cn>", "Subject": "[PATCH v1] ext4: add mb_stats_clear for mballoc statistics", "Date": "Tue, 14 Apr 2026 18:02:11 +0800", "Message-ID": "<20260414100212.95209-1-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": "_____wBHq46oEN5pKQJTFA--.6735S2", "X-Coremail-Antispam": "1Uf129KBjvJXoW3ArWrZrWDGFW7Xr13XFy3twb_yoW7Gw13pF\n\tsxXa4UCr4UZ3Wxurs3Ww4fW3ZYk3y0kryUGrWayw1S9FWavrySyF9aqFy0vFy5ArW8Aa4k\n\tX3Wqv3yDGrZYg37anT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2\n\t9KBjDUYxBIdaVFxhVjvjDU0xZFpf9x0pEo7KnUUUUU=", "X-CM-SenderInfo": "xolxutxrol0iasrtmqqrwthudrp/xtbCwgtAC2neEKsd2gAA3J", "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": "From: Baolin Liu <liubaolin@kylinos.cn>\n\nAdd a write-only mb_stats_clear sysfs knob to reset ext4 mballoc\nruntime statistics.This makes it easier to inspect allocator\nactivity for a specific workload instead of using counters\naccumulated since mount.\n\nSigned-off-by: Baolin Liu <liubaolin@kylinos.cn>\n---\n fs/ext4/ext4.h | 1 +\n fs/ext4/mballoc.c | 31 +++++++++++++++++++++++++++++++\n fs/ext4/sysfs.c | 24 ++++++++++++++++++++++++\n 3 files changed, 56 insertions(+)", "diff": "diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h\nindex 7617e2d454ea..3a32e1a515dd 100644\n--- a/fs/ext4/ext4.h\n+++ b/fs/ext4/ext4.h\n@@ -2995,6 +2995,7 @@ int ext4_fc_record_regions(struct super_block *sb, int ino,\n extern const struct seq_operations ext4_mb_seq_groups_ops;\n extern const struct seq_operations ext4_mb_seq_structs_summary_ops;\n extern int ext4_seq_mb_stats_show(struct seq_file *seq, void *offset);\n+extern void ext4_mb_stats_clear(struct ext4_sb_info *sbi);\n extern int ext4_mb_init(struct super_block *);\n extern void ext4_mb_release(struct super_block *);\n extern ext4_fsblk_t ext4_mb_new_blocks(handle_t *,\ndiff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c\nindex bb58eafb87bc..382c91586b26 100644\n--- a/fs/ext4/mballoc.c\n+++ b/fs/ext4/mballoc.c\n@@ -3219,6 +3219,8 @@ int ext4_seq_mb_stats_show(struct seq_file *seq, void *offset)\n \t}\n \tseq_printf(seq, \"\\treqs: %u\\n\", atomic_read(&sbi->s_bal_reqs));\n \tseq_printf(seq, \"\\tsuccess: %u\\n\", atomic_read(&sbi->s_bal_success));\n+\tseq_printf(seq, \"\\tblocks_allocated: %u\\n\",\n+\t\t atomic_read(&sbi->s_bal_allocated));\n \n \tseq_printf(seq, \"\\tgroups_scanned: %u\\n\",\n \t\t atomic_read(&sbi->s_bal_groups_scanned));\n@@ -4721,6 +4723,35 @@ static void ext4_mb_collect_stats(struct ext4_allocation_context *ac)\n \t\ttrace_ext4_mballoc_prealloc(ac);\n }\n \n+void ext4_mb_stats_clear(struct ext4_sb_info *sbi)\n+{\n+\tint i;\n+\n+\tatomic_set(&sbi->s_bal_reqs, 0);\n+\tatomic_set(&sbi->s_bal_success, 0);\n+\tatomic_set(&sbi->s_bal_allocated, 0);\n+\tatomic_set(&sbi->s_bal_groups_scanned, 0);\n+\n+\tfor (i = 0; i < EXT4_MB_NUM_CRS; i++) {\n+\t\tatomic64_set(&sbi->s_bal_cX_hits[i], 0);\n+\t\tatomic64_set(&sbi->s_bal_cX_groups_considered[i], 0);\n+\t\tatomic_set(&sbi->s_bal_cX_ex_scanned[i], 0);\n+\t\tatomic64_set(&sbi->s_bal_cX_failed[i], 0);\n+\t}\n+\n+\tatomic_set(&sbi->s_bal_ex_scanned, 0);\n+\tatomic_set(&sbi->s_bal_goals, 0);\n+\tatomic_set(&sbi->s_bal_stream_goals, 0);\n+\tatomic_set(&sbi->s_bal_len_goals, 0);\n+\tatomic_set(&sbi->s_bal_2orders, 0);\n+\tatomic_set(&sbi->s_bal_breaks, 0);\n+\tatomic_set(&sbi->s_mb_lost_chunks, 0);\n+\tatomic_set(&sbi->s_mb_buddies_generated, 0);\n+\tatomic64_set(&sbi->s_mb_generation_time, 0);\n+\tatomic_set(&sbi->s_mb_preallocated, 0);\n+\tatomic_set(&sbi->s_mb_discarded, 0);\n+}\n+\n /*\n * Called on failure; free up any blocks from the inode PA for this\n * context. We don't need this for MB_GROUP_PA because we only change\ndiff --git a/fs/ext4/sysfs.c b/fs/ext4/sysfs.c\nindex 923b375e017f..a5bd88a99f22 100644\n--- a/fs/ext4/sysfs.c\n+++ b/fs/ext4/sysfs.c\n@@ -41,6 +41,7 @@ typedef enum {\n \tattr_pointer_atomic,\n \tattr_journal_task,\n \tattr_err_report_sec,\n+\tattr_mb_stats_clear,\n } attr_id_t;\n \n typedef enum {\n@@ -161,6 +162,25 @@ static ssize_t err_report_sec_store(struct ext4_sb_info *sbi,\n \treturn count;\n }\n \n+static ssize_t mb_stats_clear_store(struct ext4_sb_info *sbi,\n+\t\t\t\t const char *buf, size_t count)\n+{\n+\tint val;\n+\tint ret;\n+\n+\tif (!capable(CAP_SYS_ADMIN))\n+\t\treturn -EPERM;\n+\n+\tret = kstrtoint(skip_spaces(buf), 0, &val);\n+\tif (ret)\n+\t\treturn ret;\n+\tif (val != 1)\n+\t\treturn -EINVAL;\n+\n+\text4_mb_stats_clear(sbi);\n+\treturn count;\n+}\n+\n static ssize_t journal_task_show(struct ext4_sb_info *sbi, char *buf)\n {\n \tif (!sbi->s_journal)\n@@ -251,6 +271,7 @@ EXT4_ATTR_OFFSET(mb_best_avail_max_trim_order, 0644, mb_order,\n EXT4_ATTR_OFFSET(err_report_sec, 0644, err_report_sec, ext4_sb_info, s_err_report_sec);\n EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal);\n EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats);\n+EXT4_ATTR(mb_stats_clear, 0200, mb_stats_clear);\n EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan);\n EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan);\n EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs);\n@@ -301,6 +322,7 @@ static struct attribute *ext4_attrs[] = {\n \tATTR_LIST(inode_readahead_blks),\n \tATTR_LIST(inode_goal),\n \tATTR_LIST(mb_stats),\n+\tATTR_LIST(mb_stats_clear),\n \tATTR_LIST(mb_max_to_scan),\n \tATTR_LIST(mb_min_to_scan),\n \tATTR_LIST(mb_order2_req),\n@@ -561,6 +583,8 @@ static ssize_t ext4_attr_store(struct kobject *kobj,\n \t\treturn trigger_test_error(sbi, buf, len);\n \tcase attr_err_report_sec:\n \t\treturn err_report_sec_store(sbi, buf, len);\n+\tcase attr_mb_stats_clear:\n+\t\treturn mb_stats_clear_store(sbi, buf, len);\n \tdefault:\n \t\treturn ext4_generic_attr_store(a, sbi, buf, len);\n \t}\n", "prefixes": [ "v1" ] }