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yeoreum.yun@arm.com, netdev@vger.kernel.org, matthew.brost@intel.com, her0gyugyu@gmail.com Subject: [PATCH v15 03/43] dept: add single event dependency tracker APIs Date: Tue, 13 May 2025 19:06:50 +0900 Message-Id: <20250513100730.12664-4-byungchul@sk.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20250513100730.12664-1-byungchul@sk.com> References: <20250513100730.12664-1-byungchul@sk.com> X-Brightmail-Tracker: H4sIAAAAAAAAAzWSfUxTZxSHfd/7SeWSazV60Tm1xpihIhg0x0SNWTS7M36QLEHFmNnJja0r YIqiNS6h8jGHQpgbNApoKUttaCtQyMaQEqilgs5aFbGYgkqcGeFroG1EYFvL9J+TJ+d3znP+ OSwh76QWs+qMk5I2Q6lR0DJSNhJtWjcSu1KV0JS7GYJvL5BQUWujwXfTisDWqMcw2PEFPA0N I5i6/4AAQ6kPQdXLPgIaPf0InJbzNDx+FQPdwTEaukov0pBbXUvDw6FpDIGyyxisjj3w3Pya hHslJgyGQRrKDbk4XP7CMGmuYcCcswoGLFcZmH6ZCF39PRQ4n62BK9cCNLQ4u0jwNA1geNxc QUO/7V8K7nk6SQgVLwHfj0UU2EdNNAyFzASYg2MMPGozYvAYF0JdXlhY8OYfCu4UtWEo+KUe Q3fvLQStF15gcNh6aLgdHMbQ4Cgl4P2NDgQDxSMM5F+aZKBcX4zgYn4ZCXmBjTD1Lny58m0i 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1747130865-282800 X-HE-Meta: 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 OMAzyWHr Isaz9VhgHISa5icAlXAwvj6Zxrben+oAP/s6CPsu9ZZ1M5GBp4Of1KkhlJYshrdBGSsv8KsM4nsqdgALvNZKxHvsWVg== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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 | 64 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 64 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..93d772c71905 --- /dev/null +++ b/include/linux/dept_sdt.h @@ -0,0 +1,64 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Single-event Dependency Tracker + * + * Started by Byungchul Park : + * + * Copyright (c) 2020 LG Electronics, 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 = 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", "event", 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 */ -- 2.17.1