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Mon, 13 Oct 2025 20:14:50 -0700 (PDT) Received: from L6YN4KR4K9.bytedance.net ([139.177.225.226]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-29034f3de4asm148315845ad.92.2025.10.13.20.14.40 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Mon, 13 Oct 2025 20:14:49 -0700 (PDT) From: Yunhui Cui To: akpm@linux-foundation.org, alex@ghiti.fr, anup@brainfault.org, aou@eecs.berkeley.edu, atish.patra@linux.dev, catalin.marinas@arm.com, cuiyunhui@bytedance.com, dianders@chromium.org, johannes@sipsolutions.net, lihuafei1@huawei.com, mark.rutland@arm.com, masahiroy@kernel.org, maz@kernel.org, mingo@kernel.org, nicolas.schier@linux.dev, palmer@dabbelt.com, paul.walmsley@sifive.com, suzuki.poulose@arm.com, thorsten.blum@linux.dev, wangjinchao600@gmail.com, will@kernel.org, yangyicong@hisilicon.com, zhanjie9@hisilicon.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, linux-riscv@lists.infradead.org Subject: [PATCH v4 0/2] Add HARDLOCKUP_DETECTOR_PERF support for RISC-V Date: Tue, 14 Oct 2025 11:14:23 +0800 Message-Id: <20251014031425.93284-1-cuiyunhui@bytedance.com> X-Mailer: git-send-email 2.39.2 (Apple Git-143) MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251013_201453_884245_BECD88BF X-CRM114-Status: GOOD ( 11.10 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org After discussion [1],[2], hardlockup_perf cannot be completely replaced by the hardlockup_buddy approach, so this patch is still being submitted. v1->v2: The contents of arch/arm64/watchdog_hld.c are directly consolidated into kernel/watchdog_perf.c. v2->v3: Add CONFIG_WATCHDOG_PERF_ADJUST_PERIOD to enclose the period update logic, select it by default on arm64 and riscv, without affecting other arches like x86 and PPC. v3->v4: Place the line "select WATCHDOG_PERF_ADJUST_PERIOD if HARDLOCKUP_DETECTOR_PERF && CPU_FREQ" in the Kconfig files for arm64 and riscv in one line, with no line breaks. Link: https://lore.kernel.org/all/CAD=FV=UEhVCD6JehQi1wor2sSmtTLDyf=37xfo-DOTK1=u1xzA@mail.gmail.com/ [1] Link: https://lore.kernel.org/all/20250916145122.416128-1-wangjinchao600@gmail.com/ [2] Yunhui Cui (2): watchdog: move arm64 watchdog_hld into common code riscv: add HARDLOCKUP_DETECTOR_PERF support arch/arm64/Kconfig | 1 + arch/arm64/kernel/Makefile | 1 - arch/arm64/kernel/watchdog_hld.c | 94 -------------------------------- arch/riscv/Kconfig | 3 + drivers/perf/arm_pmu.c | 10 +++- drivers/perf/riscv_pmu_sbi.c | 10 ++++ include/linux/perf/arm_pmu.h | 2 - kernel/watchdog_perf.c | 83 ++++++++++++++++++++++++++++ lib/Kconfig.debug | 8 +++ 9 files changed, 114 insertions(+), 98 deletions(-) delete mode 100644 arch/arm64/kernel/watchdog_hld.c -- 2.39.5