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Miller" , Mathieu Desnoyers , linux-trace-kernel@vger.kernel.org Cc: Jinchao Wang Subject: [PATCH v7 11/23] sched: add per-task context Date: Thu, 9 Oct 2025 18:55:47 +0800 Message-ID: <20251009105650.168917-12-wangjinchao600@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20251009105650.168917-1-wangjinchao600@gmail.com> References: <20251009105650.168917-1-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 cbb7340c5866..707b34f26264 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -22,6 +22,7 @@ #include #include #include +#include #include #include #include @@ -1487,6 +1488,10 @@ 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