AmpereComputing / ampere-lts-kernel

Linux 5.4 and 5.10 Longterm kernel (LTS) with Ampere patches
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Backport upstream Altra patch: sched/deadline: Fix missing clock update in migrate_task_rq_dl() #150

Open adamliyi opened 2 years ago

adamliyi commented 2 years ago

see: https://github.com/torvalds/linux/commit/b4da13aa28d4fd0071247b7b41c579ee8a86c81a

With CONFIG_ACPI_CPPC_CPUFREQ_FIE=y and schedutil cpufreq governor on
slow-switching system (like on this Ampere Altra WIWYNN Mt. Jade Arm
Server):

But FIE introduced since 5.14 kernel, looks we may not care if FIE disabled.

May try CONFIG_ACPI_CPPC_CPUFREQ_FIE=y in 5.15 kernel