From patchwork Wed Jan 24 11:59:14 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Byungchul Park X-Patchwork-Id: 13529097 Received: from invmail4.hynix.com (exvmail4.hynix.com [166.125.252.92]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 4693D60DEF; Wed, 24 Jan 2024 11:59:55 +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=1706097602; cv=none; b=DV7ygf//B/cgq2z2SSEnKUeHLIY5pe2tYpNwD/tJtHkWCksE2QQ6u7OX5kb90xXNUCXh2Csvor2xYuH3FPUYi8TiZ06ZRp/0EYf8klQ8J6LD9+T6aAzn3KFJz02JZW0JO9tp7P+9CRxcDTiLkCPxpt7UJb4TywW1OjzR/Y9VuHA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706097602; c=relaxed/simple; bh=yYyo9J9LbrfncpB2CWVjqJhM6aD/eyXV6B0l1bR9NkI=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References; b=c4Clt3zVw57xbYR/P7R5NXy6kGYspTnKPfkQ7QybycOQ+fQXOCAr55UZUplQu0O8pmzYFdp15x7FCVfaK8EGqbsuD1HWb9cUctaOBnBoPQg8CaVuRG/9aUwGYB6JQF/Pg2c5mWrLTIh+Ym7TGt98A3/2uT+NJHs5hWSjXsIy6Zo= 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-d85ff70000001748-71-65b0fbb43154 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, viro@zeniv.linux.org.uk, 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, 42.hyeyoo@gmail.com, chris.p.wilson@intel.com, gwan-gyeong.mun@intel.com, max.byungchul.park@gmail.com, boqun.feng@gmail.com, longman@redhat.com, hdanton@sina.com, her0gyugyu@gmail.com Subject: [PATCH v11 03/26] dept: Add single event dependency tracker APIs Date: Wed, 24 Jan 2024 20:59:14 +0900 Message-Id: <20240124115938.80132-4-byungchul@sk.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20240124115938.80132-1-byungchul@sk.com> References: <20240124115938.80132-1-byungchul@sk.com> X-Brightmail-Tracker: H4sIAAAAAAAAAzWSa0iTYRTHe573ti1XL0vyLYtkEEGZmVgdIiqC6KkIKqEPSZeVLzqaU6Zp iwRLs7yVBroysamxxrzPgpoaXtjSQrNcaqKSYpk4L2hbmXaZRl8OP875nf/5ciSUwsaslai1 8aJOq9IoWRktm/Ap3vpsvloMdg1JITcrGNzfbtNQWFXOQmdlGYLyp9cxjNkPQY/HhWC+/S0F hrxOBMVDAxQ8dQwiaDDfYKFrZAU43VMstOVlspBSWsXCu/EFDP359zCUWY/Bm5wSDI1zozQY xlh4aEjB3vIVw5zJwoEpeSMMmws4WBjaDm2D3Qw09G2BB0X9LNQ3tNHgeD6MoctWyMJg+R8G 3jhaaejMzWagYrKEhXGPiQKTe4qD941GDNWp3qC02d8MvMpuxJD2uAaD82Mdgpe3P2Gwlnez 0OJ2Yai15lHw84kdwfCdCQ5uZs1x8PD6HQSZN/NpePvrFQOp/Ttg/kchu383aXFNUSS1NpE0 eIw0eV0ikBcFAxxJfdnHEaP1Mqk1byal9WOYFM+4GWK1pLPEOnOPIxkTTkwmOzo40np/niYj TgM+7n9atidC1KgTRN22vedlUc05BUxsj98Vj2FDMnIqMpBUIvChwvCHu9x/rv89wS4yy28S envnqEX25QOE2uwvTAaSSSj+1nLBPN2+JK3iDwuZz+qWJJrfKIwO2ulFlvM7hNnWFvpf6Aah rLpxyZHyO4WKB31LfYXX+WRZPCzzOilS4c/INP63sEZoMvfSOUhuRMssSKHWJkSr1JrQoCi9 Vn0l6GJMtBV5P8qUtBD+HM10hjUjXoKUPvL9lipRwagS4vTRzUiQUEpfee+aSlEhj1Dpr4q6 mHO6yxoxrhn5S2ilnzzEkxih4CNV8eIlUYwVdf+nWCJdm4xiWwKxvrToiFkesmu6yWZffynv fVGMNCv9YHsSk3I0NzQkoGd1JOOnGfXxjyTXaBff9LmGGNmwC4/TElfyZ/uPxwcEVdiujR/K PqMVpAdWBH6PyO+JP1Y2dSrNFriupsvRXZd4MD0yuE/fvXK9R1az78TopvB6VV2S4+RJ+6MB JR0Xpdq+mdLFqf4CNNKfuk0DAAA= X-Brightmail-Tracker: H4sIAAAAAAAAAzWSWUhUYRiG+886Tk0dJqOTrQ6KkGUGGR/a4kXQX9ByZRBFTnnQybWZGp02 NW1zSw2bXBKzGIdR045GixqmuOeWU5mNK5JZLqHOkGmZGt28PHzfw3v1Skh5Fu0gUYWcF9Qh yiAFI6Wkh71itpbOFAvud0fdICXBHaxTtyjIKipgoO1JPoKC0mgChmv2w0fbCIKZ5lYS9Glt CB72d5NQWtuDoMJ4jYGOweVgto4z0JAWz0DMoyIG2r/PEmC5l0pAvngImpJzCaicHqJAP8xA pj6GmI+vBEwbTCwYopxhwJjBwmz/dmjo+UBD9YMGGiq6XCE928JAeUUDBbUvBgjoeJXFQE/B HA1NtfUUtKUk0lA4lsvAd5uBBIN1nIV3lTkEFMfOt92Y/ENDXWIlATcePyXA/KkMwetbfQSI BR8YqLaOEFAippHwK68GwUDSKAvXE6ZZyIxOQhB//R4Frb/raIi1eMDMzyzG2wtXj4yTOLYk HFfYcijcmMvjlxndLI593cXiHPECLjFuxo/Khwn8cMJKY9F0m8HiRCqL40bNBB5raWFx/f0Z Cg+a9cTRdcelu/yEIJVWUG/b4ysNqErOoMM+ro6w6TdGIbM8DtlJeG4HX/5nlFlghnPhOzun yQW25zbxJYlf6DgklZDczaW88UfzorSSO8DHPytblCjOmR/qqaEWWMZ58JP11dS/0o18fnHl omPH7eQL07sW7/J5p890h01G0hy0xITsVSHaYKUqyMNNExigC1FFuJ0JDRbR/GYMV2ZTXqCp jv1ViJMgxTKZt6lIkNNKrUYXXIV4Camwl3WueSLIZX5K3UVBHXpKfSFI0FShtRJKsVp28Jjg K+f8leeFQEEIE9T/v4TEziEK1a2dsiXoLP0vM70dI+d88pyHJp97HmnyTNW+r0/TOn0Kd9r0 5YTqhNkyHDbnKd1b6rre0rt7n9jSN3D57WCvasXTn65J7/1dzjXiduO3lFVnl1xNXxejaP18 2N/RY+vEteiavuwt1pUbxNnOSFJ6uSz7tAzCfXyYNwC1l/q7dScVlCZAuX0zqdYo/wK06lAC LwMAAA== X-CFilter-Loop: Reflected Precedence: bulk X-Mailing-List: linux-block@vger.kernel.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 (the simplest way): 1. Initaialize a map for the interesting wait. /* * Recommand to place along with the wait instance. */ struct dept_map my_wait; /* * Recommand to 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 | 62 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 62 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..12a793b90c7e --- /dev/null +++ b/include/linux/dept_sdt.h @@ -0,0 +1,62 @@ +/* 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_) +#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) +#endif +#endif /* __LINUX_DEPT_SDT_H */