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Message-Id: <20251009032838.63060-1-cuiyunhui@bytedance.com>
Date: Thu, 9 Oct 2025 11:28:36 +0800
From: Yunhui Cui <cuiyunhui@...edance.com>
To: akpm@...ux-foundation.org,
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Subject: [PATCH v3 0/2] Add HARDLOCKUP_DETECTOR_PERF support for RISC-V
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.
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 | 2 +
arch/arm64/kernel/Makefile | 1 -
arch/arm64/kernel/watchdog_hld.c | 94 --------------------------------
arch/riscv/Kconfig | 4 ++
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, 116 insertions(+), 98 deletions(-)
delete mode 100644 arch/arm64/kernel/watchdog_hld.c
--
2.39.5
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