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Bug#1059969: linux-image-6.6.9-amd64: CONFIG_MODULE_COMPRESS_XZ=y breaks cpu frequency scaling governor kernel module

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在 2024/1/4 22:26, Jy Deng 写道:
> On Thu, 04 Jan 2024 15:04:53 +0100 Diederik de Haas 
> <didi.debian@cknow.org> wrote:
> > On Thursday, 4 January 2024 14:34:10 CET Jy Deng wrote:
> > > 3. I find that if CONFIG_CPU_FREQ_GOV_POWERSAVE=m, then though such
> > > module cannot be in use after boot at once, but it is possible to
> > > manually modprobe them. So it may indicate that to use
> > > CONFIG_CPU_FREQ_GOV_POWERSAVE=m with CONFIG_MODULE_COMPRESS_XZ=y is
> > > actually possible. The problem we find here may be not so fundamental.
> >
> > That's actually how it always worked.
> > $ cat 
> /sys/devices/system/cpu/cpufreq/policy0/scaling_available_governors
> >
> > likely only lists 'performance' and 'schedutil'.
> > /lib/modules/$(uname -r)/kernel/drivers/cpufreq/ lists several more 
> governors
> > and when you modprobe them, they get added to 
> 'scaling_available_governors'.
> > And also to `cpupower frequency-info` -> 'available cpufreq governors'.
>
> >So if you can verify whether it works with 'modprobe' then this is 
> not a bug.
>
>
> The problem is that those modules of governors, when without kernel 
> module compression, they will be automatically loaded. However, when 
> module compression like CONFIG_MODULE_COMPRESS_XZ is set as 'y', then 
> I have to manually load them by 'modprobe'. While it is OK to say this 
> is not a bug, it is also important to find out what makes such difference.
>

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Bug#1059969: linux-image-6.6.9-amd64: CONFIG_MODULE_COMPRESS_XZ=y breaks cpu frequency scaling governor kernel module Luca Boccassi <bluca@debian.org> - 2024-01-04 12:40 +0100
  Bug#1059969: linux-image-6.6.9-amd64: CONFIG_MODULE_COMPRESS_XZ=y breaks cpu frequency scaling governor kernel module Jy Deng <1700011628@pku.edu.cn> - 2024-01-04 14:50 +0100
    Bug#1059969: linux-image-6.6.9-amd64: CONFIG_MODULE_COMPRESS_XZ=y breaks cpu frequency scaling governor kernel module Diederik de Haas <didi.debian@cknow.org> - 2024-01-04 15:20 +0100
      Bug#1059969: linux-image-6.6.9-amd64: CONFIG_MODULE_COMPRESS_XZ=y breaks cpu frequency scaling governor kernel module Jy Deng <1700011628@pku.edu.cn> - 2024-01-04 16:00 +0100
      Bug#1059969: linux-image-6.6.9-amd64: CONFIG_MODULE_COMPRESS_XZ=y breaks cpu frequency scaling governor kernel module Jy Deng <1700011628@pku.edu.cn> - 2024-01-04 16:50 +0100

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