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Bug#656328: linux-image-3.1.0-1-amd64: please enable CONFIG_X86_P4_CLOCKMOD for amd64



Package: linux-2.6
Version: 3.1.8-2
Severity: normal

Dear Debian folks,


this is the same report as report #490108 [1] which has been closed
already. I am submitting a new report instead of reopening #490108,
since this request only involves amd64 which was not fixed.

        $ grep -i clockm /boot/config-3.1.0-1-* 
        /boot/config-3.1.0-1-686-pae:CONFIG_X86_P4_CLOCKMOD=m
        /boot/config-3.1.0-1-amd64:# CONFIG_X86_P4_CLOCKMOD is not set

Frequency scaling does not work with the following Intel Pentium 4
processor when using the Linux kernel for amd64.

        $ more /proc/cpuinfo
        processor	: 0
        vendor_id	: GenuineIntel
        cpu family	: 15
        model		: 4
        model name	: Intel(R) Pentium(R) 4 CPU 3.00GHz
        stepping	: 9
        cpu MHz		: 2999.275
        cache size	: 1024 KB
        physical id	: 0
        siblings	: 2
        core id		: 0
        cpu cores	: 1
        apicid		: 0
        initial apicid	: 0
        fpu		: yes
        fpu_exception	: yes
        cpuid level	: 5
        wp		: yes
        flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc pebs bts nopl pni dtes64 monitor ds_cpl cid cx16 xtpr lahf_lm
        bogomips	: 5998.55
        clflush size	: 64
        cache_alignment	: 128
        address sizes	: 36 bits physical, 48 bits virtual
        power management:

        processor	: 1
        vendor_id	: GenuineIntel
        cpu family	: 15
        model		: 4
        model name	: Intel(R) Pentium(R) 4 CPU 3.00GHz
        stepping	: 9
        cpu MHz		: 2999.275
        cache size	: 1024 KB
        physical id	: 0
        siblings	: 2
        core id		: 0
        cpu cores	: 1
        apicid		: 1
        initial apicid	: 1
        fpu		: yes
        fpu_exception	: yes
        cpuid level	: 5
        wp		: yes
        flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc pebs bts nopl pni dtes64 monitor ds_cpl cid cx16 xtpr lahf_lm
        bogomips	: 5999.73
        clflush size	: 64
        cache_alignment	: 128
        address sizes	: 36 bits physical, 48 bits virtual
        power management:

The reason is, that this processor does not have speedstep technology
and therefore neither acpi-cpufreq nor speedstep-centrino modules can be
used for frequency scaling.

To get something similar module p4_clockmod provides frequency
throttling [1], but is currently not included in the package for amd64.

It would be great if you could build that module and distribute it in
the package for amd64.


Thanks,

Paul


[1] http://bugs.debian.org/490108

-- Package-specific info:
** Version:
Linux version 3.1.0-1-amd64 (Debian 3.1.8-2) (ben@decadent.org.uk) (gcc version 4.6.2 (Debian 4.6.2-11) ) #1 SMP Tue Jan 10 06:25:07 UTC 2012

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