driver inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/IC7CQP ---------------------------------------------------------------------- watchdog perf needs architecture to provide method for converting the watchdog thresh to counter period. For arm64 we're using the max CPU frequency for doing the conversion which is from cpufreq driver. But some cpufreq driver are registered lately, for example cppc_cpufreq will be registered at late initcall which is after the initialization of watchdog perf (initialized in armv8_pmuv3 of device initcall). In such case the period of watchdog will not be accurate enough. Fix this by registering a cpufreq notifier and update the watchdog period once the cpufreq driver is initialized. Yicong Yang (2): watchdog/perf: Provide function for adjusting the event period arm64/watchdog_hld: Add a cpufreq notifier for update watchdog thresh arch/arm64/kernel/watchdog_hld.c | 58 ++++++++++++++++++++++++++++++++ include/linux/nmi.h | 2 ++ kernel/watchdog_perf.c | 23 +++++++++++++ 3 files changed, 83 insertions(+) -- 2.33.0