From nobody Fri Dec 19 17:19:31 2025 Received: from invmail4.hynix.com (exvmail4.hynix.com [166.125.252.92]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 2E7EA26A0BA; Mon, 19 May 2025 09:18:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=166.125.252.92 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747646331; cv=none; b=CpnHSRhqrVztvKHsLx0MZx6SK25B0PexEZVYHZn3mb4dH0wuqEw+F8dqH+clyifm8liB8qDS65B8zt7iVZNzntorzGBwrOZabU+lHJ8VGAuNqJBybLt5NibGSFWy9UdyzHsiBtYmb5FlT6KE9vhrPuPgqwLUzT9gEGzOS1Fm41o= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747646331; c=relaxed/simple; bh=UPgrUdj2zJuIcM2CRwF3Ndg48wh45GAuitrkG1THTag=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References; b=Y2Jd0iqX19oi9SH5Xo4C6mWgqqtxZYQ4UMtjZPTuOsx5lKIqtQd8q+bexlg9xf0XlzfqBuUr2iUDu+h3bzmWPEyBcoIZ1kEHcUsfdvL47Oc3ugVNDuWXap/dwWcqo7L3XyHJUH2cIctdKsKgFE5fls8gdPd20wyMGu6wLfz3CDk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=sk.com; spf=pass smtp.mailfrom=sk.com; arc=none smtp.client-ip=166.125.252.92 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=sk.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=sk.com X-AuditID: a67dfc5b-669ff7000002311f-70-682af76d4e9d From: Byungchul Park To: linux-kernel@vger.kernel.org Cc: kernel_team@skhynix.com, torvalds@linux-foundation.org, damien.lemoal@opensource.wdc.com, linux-ide@vger.kernel.org, adilger.kernel@dilger.ca, linux-ext4@vger.kernel.org, mingo@redhat.com, peterz@infradead.org, will@kernel.org, tglx@linutronix.de, rostedt@goodmis.org, joel@joelfernandes.org, sashal@kernel.org, daniel.vetter@ffwll.ch, duyuyang@gmail.com, johannes.berg@intel.com, tj@kernel.org, tytso@mit.edu, willy@infradead.org, david@fromorbit.com, amir73il@gmail.com, gregkh@linuxfoundation.org, kernel-team@lge.com, linux-mm@kvack.org, akpm@linux-foundation.org, mhocko@kernel.org, minchan@kernel.org, hannes@cmpxchg.org, vdavydov.dev@gmail.com, sj@kernel.org, jglisse@redhat.com, dennis@kernel.org, cl@linux.com, penberg@kernel.org, rientjes@google.com, vbabka@suse.cz, ngupta@vflare.org, linux-block@vger.kernel.org, josef@toxicpanda.com, linux-fsdevel@vger.kernel.org, jack@suse.cz, jlayton@kernel.org, dan.j.williams@intel.com, hch@infradead.org, djwong@kernel.org, dri-devel@lists.freedesktop.org, rodrigosiqueiramelo@gmail.com, melissa.srw@gmail.com, hamohammed.sa@gmail.com, harry.yoo@oracle.com, chris.p.wilson@intel.com, gwan-gyeong.mun@intel.com, max.byungchul.park@gmail.com, boqun.feng@gmail.com, longman@redhat.com, yskelg@gmail.com, yunseong.kim@ericsson.com, yeoreum.yun@arm.com, netdev@vger.kernel.org, matthew.brost@intel.com, her0gyugyu@gmail.com Subject: [PATCH v16 03/42] dept: add single event dependency tracker APIs Date: Mon, 19 May 2025 18:17:47 +0900 Message-Id: <20250519091826.19752-4-byungchul@sk.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20250519091826.19752-1-byungchul@sk.com> References: <20250519091826.19752-1-byungchul@sk.com> X-Brightmail-Tracker: H4sIAAAAAAAAAzWSWUwTYRDH/Xa3u22huKnXKhq0EQ+MKF6ZGM948Pmg8YoPGpVGVtsI1bSK oMGAHHJ7JEAUrLVIbWiR2qLiUYIQLg9EwXIIKKgEwhXRVkE8CpGXyS8z8//NywhJaZVghlCp OsWrVfIQGS2mxH2e+sWqH36KpfkDc8D5PYGC7AIzDbV3TQjMhdEEdJcHQoOrF8GvV69JyEyv RXCrvZWEwoo2BHbjBRrqPntBvXOAhur0ZBpicgpoeNMzQkBLxlUCTNbt8MHQScGLy3oCMrtp yMqMIdyli4AhQx4Dhihf6DBeZ2CkPQCq2xwCsDcvgmvaFhqe2qspqCjqIKDucTYNbea/AnhR UUWBK80baq+kCiC/X09Dj8tAgsE5wMDbEh0BFbqpYIl1C+O//RFAZWoJAfG37xFQ3/QEQXHC RwKsZgcNZc5eAmzWdBKG75Qj6EjrYyAuZYiBrOg0BMlxGRTEtqyEXz/dl298D4DomxYK8n87 0Ia12Kw1I1zWO0DiWNsZPOx8R2O7S0fh53oOP7reyuDY4mYG66ynsc3oh3OedhP41qBTgK15 iTS2Dl5lcFJfPYH7a2qYnTP3i9cE8yHKMF69ZF2QWPHtTQF58iUXrm+zUFHINikJiYQcu4Kr evgQjbOzrokaZZqdzzU2DpGjPJmdzdlSOwVJSCwkWYcH13CjaSwwid3G5TpqxgIU68sN2h/Q oyxhV3JV9y79l/pwJkvJmEjEruKak8vG+lL3Tr1JS41KOTZLxP18a/kfmM49MzZSl5FEhybk IalSFRYqV4as8FdEqJTh/kdOhFqR+78MkSMHitBg7Z5SxAqRzFNisS9USAXyME1EaCnihKRs siTPtkAhlQTLI87y6hOH1adDeE0p8hZSsmmSZa4zwVL2mPwUf5znT/Lq8SkhFM2IQtrdre1I XZj7O6txb9S81+8OafdVWjZvvd8/uzgmZjhyy4NkyZevu1ZvGOn+8inFdLD9qGRj4qvlc6Z5 SX2au/YGpbV6LnJWn4e5kRfBE3/0PR+XQRsmvt+xPmVWz/3yHecKNjV4G70e25ZNSfWwBSVu tvcY/4iGf+BAqkiT8CzbRyqjNAp5gB+p1sj/AV5ct3JbAwAA X-Brightmail-Tracker: H4sIAAAAAAAAAzWSW0xTaRDH/c6das1JJXq8BdPEqBgvGKtDNIT4IJ+a3bjG4OVFGz3axoLY CopmI9iCLFAQIrCiYEGtWIqUFu+UIChaLwiCRQhWIayCoESkrBUUC8aXyS/zn/nNy3CkzELP 4tTRh0VttFIjZySU5M81+iWa/4NVy1uzAbxDKRScL7cy0HitFIG1MpGA3gcR0Drcj2Dk2XMS 8nIaERR1viahst6DwFlykoHm7qnQ4h1gwJWTxoD+YjkDTX2jBHTkZhNQav8D3pjfUfDkdDEB eb0MnMvTE/7SQ4DPbGHBnDAfukryWRjtDAGXx01DXYGLBmf7Yjhb2MFAldNFQf2tLgKa75xn wGMdo+FJ/SMKhjNmQ2OWkYayT8UM9A2bSTB7B1h4UWMioN40HWwGvzX5yw8aHhprCEi+VEFA S9tdBNUpbwmwW90M1Hn7CXDYc0j4duUBgq6MjywkpftYOJeYgSAtKZcCQ4cCRr76LxcMhUDi BRsFZd/dKDwMWwutCNf1D5DY4DiCv3lfMtg5bKLw42IB385/zWJDdTuLTfZY7CgJxhereglc NOilsd3yD4Ptg9ksTv3YQuBPDQ3s5rk7JWv3ihp1nKhdFrZbovrSVE7GPBWOFntsVAJyTEtF AZzArxS8zW3UODP8AuHVKx85zoH8PMFhfEenIglH8u7JQmtBGxoPpvEbhMvuhokFip8vDDpv MOMs5RXCo4pM9EsaJJTaaiZEAfwqoT2tbqIv88+0lBZSp5HEhCZZUKA6Oi5KqdYoluoOqOKj 1UeX7jkYZUf+DzL/PZp1Cw01R9QinkPyKVKbc5FKRivjdPFRtUjgSHmg1OJYqJJJ9yrjj4na g7u0sRpRV4tmc5R8hnTjNnG3jN+vPCweEMUYUfs7JbiAWQlo/fvH2SVhc9Kn/3V8pjFra9Cm 8BlBJ07d69zi6r+Px/IjNpcd8awLtd8c3FHZLSXXNRlWrc46k/6f4qqy73pkQLcvcju3KOlu rr5t/79FxorMrytCZUW96fqx2Ji3oRkjTaNJ+sU+uiL5ekrm2Z6b+w6tGLn6QVHl2Hcq/Pvn 7hs9c6rllE6lDAkmtTrlTyrxfgA9AwAA X-CFilter-Loop: Reflected Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Wrapped the base APIs for easier annotation on wait and event. Start with supporting waiters on each single event. More general support for multiple events is a future work. Do more when the need arises. How to annotate: 1. Initaialize a map for the interesting wait. /* * Place along with the wait instance. */ struct dept_map my_wait; /* * Place in the initialization code. */ sdt_map_init(&my_wait); 2. Place the following at the wait code. sdt_wait(&my_wait); 3. Place the following at the event code. sdt_event(&my_wait); That's it! Signed-off-by: Byungchul Park --- include/linux/dept_sdt.h | 65 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 65 insertions(+) create mode 100644 include/linux/dept_sdt.h diff --git a/include/linux/dept_sdt.h b/include/linux/dept_sdt.h new file mode 100644 index 000000000000..0535f763b21b --- /dev/null +++ b/include/linux/dept_sdt.h @@ -0,0 +1,65 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Single-event Dependency Tracker + * + * Started by Byungchul Park : + * + * Copyright (c) 2020 LG Electronics, Inc., Byungchul Park + * Copyright (c) 2024 SK hynix, Inc., Byungchul Park + */ + +#ifndef __LINUX_DEPT_SDT_H +#define __LINUX_DEPT_SDT_H + +#include +#include + +#ifdef CONFIG_DEPT +#define sdt_map_init(m) \ + do { \ + static struct dept_key __key; \ + dept_map_init(m, &__key, 0, #m); \ + } while (0) + +#define sdt_map_init_key(m, k) dept_map_init(m, k, 0, #m) + +#define sdt_wait(m) \ + do { \ + dept_request_event(m); \ + dept_wait(m, 1UL, _THIS_IP_, __func__, 0); \ + } while (0) + +/* + * sdt_might_sleep() and its family will be committed in __schedule() + * when it actually gets to __schedule(). Both dept_request_event() and + * dept_wait() will be performed on the commit. + */ + +/* + * Use the code location as the class key if an explicit map is not used. + */ +#define sdt_might_sleep_start(m) \ + do { \ + struct dept_map *__m =3D m; \ + static struct dept_key __key; \ + dept_stage_wait(__m, __m ? NULL : &__key, _THIS_IP_, __func__);\ + } while (0) + +#define sdt_might_sleep_end() dept_clean_stage() + +#define sdt_ecxt_enter(m) dept_ecxt_enter(m, 1UL, _THIS_IP_, "start", "ev= ent", 0) +#define sdt_event(m) dept_event(m, 1UL, _THIS_IP_, __func__) +#define sdt_ecxt_exit(m) dept_ecxt_exit(m, 1UL, _THIS_IP_) +#define sdt_request_event(m) dept_request_event(m) +#else /* !CONFIG_DEPT */ +#define sdt_map_init(m) do { } while (0) +#define sdt_map_init_key(m, k) do { (void)(k); } while (0) +#define sdt_wait(m) do { } while (0) +#define sdt_might_sleep_start(m) do { } while (0) +#define sdt_might_sleep_end() do { } while (0) +#define sdt_ecxt_enter(m) do { } while (0) +#define sdt_event(m) do { } while (0) +#define sdt_ecxt_exit(m) do { } while (0) +#define sdt_request_event(m) do { } while (0) +#endif +#endif /* __LINUX_DEPT_SDT_H */ --=20 2.17.1