[Bug 10654] New: cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed gets BUG on Transmeta Crusoe CPU

[Bug 10654] New: cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed gets BUG on Transmeta Crusoe CPU

[bugme-daemon]

http://bugzilla.kernel.org/show_bug.cgi?id=10654

           Summary: cat
                    /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed
                    gets BUG on Transmeta Crusoe CPU
           Product: Power Management
           Version: 2.5
     KernelVersion: 2.6.25
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: cpufreq
        AssignedTo: cpufreq@www.linux.org.uk
        ReportedBy: masaki-c@nict.go.jp


Latest working kernel version: 2.6.24
Distribution: Fedora 9(rawhide)

Problem Description:

Reading from /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed
gets BUG() on Transmeta CPU.
See https://bugzilla.redhat.com/show_bug.cgi?id=443354 for more info.


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[Bug 10654] cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed gets BUG on Transmeta Crusoe CPU

[bugme-daemon]

http://bugzilla.kernel.org/show_bug.cgi?id=10654


akpm@osdl.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |akpm@osdl.org




------- Comment #1 from akpm@osdl.org  2008-05-09 00:08 -------
Masaki Chikama has proposed a patch there.  Did you try it?


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[Bug 10654] cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed gets BUG on Transmeta Crusoe CPU

[bugme-daemon]

http://bugzilla.kernel.org/show_bug.cgi?id=10654





------- Comment #2 from akpm@osdl.org  2008-05-09 00:09 -------
Oh. that's you ;)

Please email the patch as per Documentation/SubmittingPatches to

Andrew Morton <akpm@linux-foundation.org>
cpufreq@www.linux.org.uk
Dave Jones <davej@codemonkey.org.uk>

Thanks.


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[Bug 10654] cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed gets BUG on Transmeta Crusoe CPU

[bugme-daemon]

http://bugzilla.kernel.org/show_bug.cgi?id=10654





------- Comment #3 from trenn@suse.de  2008-05-09 05:13 -------
The p4-clockmod must not be used, take the throttling interface exposed through
drivers/acpi/processor_throttling.c
instead.

I hope it finally gets removed from the kernel, here a quote from the cpufreq
list a while ago (Subject: Celeron 220):
-----------
DaveJ shut it off in the Fedora kernels a while ago now, and only a few people 
have even noticed, and most understood that it was for the best...
-----------


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[Bug 10654] cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed gets BUG on Transmeta Crusoe CPU

[bugme-daemon]

http://bugzilla.kernel.org/show_bug.cgi?id=10654





------- Comment #4 from linux@brodo.de  2008-05-28 06:15 -------
Masaki Chikama: your patch at redhat's bugzilla seems to be the proper fix.
Could you submit it to the cpufreq mailing list, please?

@Thomas: this is not p4-clockmod.


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[Bug 10654] cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed gets BUG on Transmeta Crusoe CPU

[bugme-daemon]

http://bugzilla.kernel.org/show_bug.cgi?id=10654


akpm@osdl.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |CODE_FIX




------- Comment #5 from akpm@osdl.org  2008-05-28 12:07 -------
I already have this patch in -mm, as
cpufreq-fix-null-object-access-on-transmeta-cpu.patch
It has been sent to davej once but he is asleep.  I'll merge it up.

I'll add your acked-by to the patch and I'll close this report, thanks.


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