From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pf1-f176.google.com (mail-pf1-f176.google.com [209.85.210.176]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A998E23AB9F for ; Tue, 30 Sep 2025 02:45:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.176 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759200318; cv=none; b=kyAZRmtLcW54bSJFuYha6uvbUJD31mJ5bD17x07vm86XiQX0mNtZGFtN+VXlyJPTLZfsobNDpYfwkB1FXujJJxNktjZhGGMLRYcKtOvIgkY8T6ONqIfqycOxw1nRwhrw4e2nwBT31DCy7Hq4hBETK1pIFqn8zA14YVkKkSCmp0c= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759200318; c=relaxed/simple; bh=wmwmRtcPH4ST6Dm0G2/AFHsMnlz3q9k9yRWhyo1wI/Y=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Wz4SbHKJn1xyDDVHhZbXYSW0z/RmMvG0KAp1mdMlmV/05W4NAxvKwLM7Jym42c2zkfn/CzdtUUHfZbJ+T1g7hKi+WIV4IeSoBPIuvSRQcN6TNNphk5rOHTf0PoV3GDThQ8btri8Q0TxSQwThXyMYPZDk+k2vi//NtjFiFGlfhqE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=KMQ3RZdc; arc=none smtp.client-ip=209.85.210.176 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="KMQ3RZdc" Received: by mail-pf1-f176.google.com with SMTP id d2e1a72fcca58-78118e163e5so2786771b3a.0 for ; Mon, 29 Sep 2025 19:45:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1759200316; x=1759805116; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=E4BKEfc9ax2ksTKKBAwbjubQHvBiDjA54WMJGQTptLg=; b=KMQ3RZdckAmme0jUOCXJIopgemB2Ja56Kpmz+pbEeM0xoR/HYAly3J0SYhU6acxg9c TE1YANvW5GLqxlokWaBsC94u3Df3Poh7J2S51JRvuFVp5QAN4u0/5Bk78DnZflaGAIF3 GaAHFrt/JiI3GGcSiAZQKNFeq5N/scmw79xffzCMMwoXlLpaig1EUpBnmgp1Xiw4lE+W yRRuhICYSgLsqg2mBt8118beN1+fESg9GutgwL7xJ4G0koaRA8mIIogGpHVqAX7Rf4LP cnwMekiQj0fEx2e6tzstCrH0wuSOhn7ui5xrX7TGCEuEe800b1rM4DQqwnuwfGOHLdgI wlLg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1759200316; x=1759805116; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=E4BKEfc9ax2ksTKKBAwbjubQHvBiDjA54WMJGQTptLg=; b=m5A6EgUcCFzGLzMLacYEcAXD2WI0dexpoaTqTZ2EA0zZXSaOFIXMNTH+qjlMSU/QKN w+kXYM+afwpAHEBdNo/rqPWNiz2BxUa9ULSj9ROg9D/gFP46vsezeEqGspYjq9FGr6oM /WPaopq93pCuMLzvYL5EVcg6hVvN0m2V9NCaTCc5DGItdoz91pHHDHs9akNaQnb4lcAA iyMFhvDUeYykXSk9XOWmA48Tlm73PT0Rk8KDTmVdPqTZXcMFrdiitPHQCcXRWj/NaiLY t4o36MQrj3FQUwQ+1kjYmHoBanQOJ9C6Idv+siViI/u9NWFg2TK/tGBExw16PxsdSgXL Qjqw== X-Forwarded-Encrypted: i=1; AJvYcCU6DwUZtZM4qJK9rx1amsBGWAqrmoS0q8yI8vD/UIJ5HFdiIIwnUc6Qd9xUWeTdxdzdGoTqledjuK9BAZEIhm95@vger.kernel.org X-Gm-Message-State: AOJu0Yx1epKORcXS1emaeegVz4CM3wmxOjS3vFhpMdgeigXN1iEw9uah ZSvEmPuPaNTF3ortmYdi5ZGUImeANeaPC8Lm+bUoceNKv6YbvZ0Fj7iK X-Gm-Gg: ASbGnctguSAyljkjSBavOR24lgp9tf5ro4V+LP/jbvH9Hx50oBP8wbe55UGfxzW67nl YA2mQkAJX0CYRWM6ypJPSuJ/i+7Jze5ybs3jxztsuKKEl4IA12+MUa0eQiHxt/lSlAfv7USWy0h qOQ2/M0t1lPwuUiUWvROuV1wzjHG5AvL981nffF9Ubs1syKiiSaCUPtWaJTmLG3QuoLfgK/ldoM HfklnHvp+eHgw25RJAUtmKP9TtTK97d+ckO7DsSvOoOXg6Ylvn+6uAXi7zPVeou5c/GMjkS9Hjq zOnzonfK/tLLzB+RhDdeIJmHJPmA3Wby9MtnN4vMqtDJZgoF1kIJhoBvjDVIw4sNAvvrUpOK/lO MuDTIJvz9P4bdBtx3F6/fGCShRb8gIhwZ3SYKI35DXNdDydPZeQ1VOwmwR2CnSx2xSOW3rL+SUB nTEDbAMmRA5H4= X-Google-Smtp-Source: AGHT+IEQuyQ0WfSSzPcc+c258KMZgmg4lZ9MhFnyLGeSTv6phqmEXsURuXiHXbyU/qbGHk1KY6eV1g== X-Received: by 2002:a05:6a21:3296:b0:2b5:9c2:c584 with SMTP id adf61e73a8af0-31772a179dcmr3208370637.26.1759200315810; Mon, 29 Sep 2025 19:45:15 -0700 (PDT) Received: from localhost ([45.142.167.196]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-b57c557418csm12399859a12.30.2025.09.29.19.45.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 29 Sep 2025 19:45:15 -0700 (PDT) From: Jinchao Wang To: Andrew Morton , Masami Hiramatsu , Peter Zijlstra , Mike Rapoport , Alexander Potapenko , Randy Dunlap , Marco Elver , Jonathan Corbet , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Valentin Schneider , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , "Liang, Kan" , David Hildenbrand , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Suren Baghdasaryan , Michal Hocko , Nathan Chancellor , Nick Desaulniers , Bill Wendling , Justin Stitt , Kees Cook , Alice Ryhl , Sami Tolvanen , Miguel Ojeda , Masahiro Yamada , Rong Xu , Naveen N Rao , David Kaplan , Andrii Nakryiko , Jinjie Ruan , Nam Cao , workflows@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, linux-mm@kvack.org, llvm@lists.linux.dev, Andrey Ryabinin , Andrey Konovalov , Dmitry Vyukov , Vincenzo Frascino , kasan-dev@googlegroups.com, "David S. Miller" , Mathieu Desnoyers , linux-trace-kernel@vger.kernel.org Cc: Jinchao Wang Subject: [PATCH v6 11/23] sched: add per-task context Date: Tue, 30 Sep 2025 10:43:32 +0800 Message-ID: <20250930024402.1043776-12-wangjinchao600@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250930024402.1043776-1-wangjinchao600@gmail.com> References: <20250930024402.1043776-1-wangjinchao600@gmail.com> Precedence: bulk X-Mailing-List: linux-perf-users@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Introduce struct ksw_ctx to enable lockless per-task state tracking. This is required because KStackWatch operates in NMI context (via kprobe handler) where traditional locking is unsafe. Signed-off-by: Jinchao Wang --- include/linux/kstackwatch_types.h | 14 ++++++++++++++ include/linux/sched.h | 5 +++++ 2 files changed, 19 insertions(+) create mode 100644 include/linux/kstackwatch_types.h diff --git a/include/linux/kstackwatch_types.h b/include/linux/kstackwatch_types.h new file mode 100644 index 000000000000..2b515c06a918 --- /dev/null +++ b/include/linux/kstackwatch_types.h @@ -0,0 +1,14 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _LINUX_KSTACK_WATCH_TYPES_H +#define _LINUX_KSTACK_WATCH_TYPES_H +#include + +struct ksw_watchpoint; +struct ksw_ctx { + struct ksw_watchpoint *wp; + ulong sp; + u16 depth; + u16 generation; +}; + +#endif /* _LINUX_KSTACK_WATCH_TYPES_H */ diff --git a/include/linux/sched.h b/include/linux/sched.h index f8188b833350..6935ee51f855 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -22,6 +22,7 @@ #include #include #include +#include #include #include #include @@ -1481,6 +1482,10 @@ struct task_struct { struct kmsan_ctx kmsan_ctx; #endif +#if IS_ENABLED(CONFIG_KSTACK_WATCH) + struct ksw_ctx ksw_ctx; +#endif + #if IS_ENABLED(CONFIG_KUNIT) struct kunit *kunit_test; #endif -- 2.43.0