linux内核升级到4.2.8 cpu超频失效

liushuiwu

    如题所诉，linux系统是centos7.3对应的内核是3.10.0-514.e17.x86_64，在这个内核下通过cpupower frequency-info查看结果是hardware limits:800MHz-5.00GHz,但是内核升级到4.2.8后变成hardware limits:800MHz-4.2GHz。    各位大神这个这么破？困扰好多天了。

liushuiwu

回复 2# wwwdsxtop

这两个没关系吧？

liushuiwu

有大神能解决这个问题吗？

liushuiwu

继续顶呀，顶上去

liushuiwu

继续顶，不能沉了

Tinnal

建议看看https://wiki.ubuntu.com/OverclockingCpu 。 别自己超频成功了， 还不知道。

Tinnal

回复 6# liushuiwu

也有可能是因为高版本的这个提交， 改变了策略。https://git.kernel.org/pub/scm/l ... b971d8b85ab505d95c8

[size=16.6667px]cpufreq: Add boost frequency support in core
[size=13.3333px]This commit adds boost frequency support in cpufreq core (Hardware &Software). Some SoCs (like Exynos4 - e.g. 4x12) allow setting frequencyabove its normal operation limits. Such mode shall be only used for ashort time.Overclocking (boost) support is essentially provided by platformdependent cpufreq driver.This commit unifies support for SW and HW (Intel) overclocking solutionsin the core cpufreq driver. Previously the "boost" sysfs attribute wasdefined in the ACPI processor driver code. By default boost is disabled.One global attribute is available at: /sys/devices/system/cpu/cpufreq/boost.It only shows up when cpufreq driver supports overclocking.Under the hood frequencies dedicated for boosting are marked with aspecial flag (CPUFREQ_BOOST_FREQ) at driver's frequency table.It is the user's concern to enable/disable overclocking with a proper callto sysfs.The cpufreq_boost_trigger_state() function is defined non static on purpose.It is used later with thermal subsystem to provide automatic enable/disableof the BOOST feature.

liushuiwu

回复 8# Tinnal
谢谢