* [Bug 51741] New: powernow-k8 calls for acpi-cpufreq but doesn’t warn if it’s not available
@ 2012-12-16 16:03 bugzilla-daemon
2012-12-16 16:13 ` [Bug 51741] " bugzilla-daemon
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: bugzilla-daemon @ 2012-12-16 16:03 UTC (permalink / raw)
To: cpufreq
https://bugzilla.kernel.org/show_bug.cgi?id=51741
Summary: powernow-k8 calls for acpi-cpufreq but doesn’t warn if
it’s not available
Product: Power Management
Version: 2.5
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: cpufreq
AssignedTo: cpufreq@vger.kernel.org
ReportedBy: linuxuser330250@gmx.net
Regression: No
On my system, I used to have powernow-k8 compiled into the kernel, but not
acpi-cpufreq. I run Gentoo Linux.
With sys-kernel/gentoo-sources-3.6.8, I got the following relevent dmesg
output:
powernow-k8: Found 1 AMD Phenom(tm) II X6 1090T Processor (6 cpu cores)
(version 2.20.00)
powernow-k8: Core Performance Boosting: on.
powernow-k8: 0 : pstate 0 (3200 MHz)
powernow-k8: 1 : pstate 1 (2400 MHz)
powernow-k8: 2 : pstate 2 (1600 MHz)
powernow-k8: 3 : pstate 3 (800 MHz)
Now, with sys-kernel/gentoo-sources-3.7.0, dmesg showed the following:
powernow-k8: this CPU is not supported anymore, using acpi-cpufreq instead.
This lead me into thinking that acpi-cpufreq was used when it actually wasn’t,
because it was missing in my kernel (since I don’t know all config options by
heart: I had to check for that).
I found that the fans were a bit noisier than normal, so I looked in
/proc/cpuinfo, which showed all 6 cores were at 3.2 GHz.
I then recompiled the kernel with acpi-cpufreq compiled in and removed
powernow-k8. Now /proc/cpuinfo shows 800 MHz on all or most of the cores when
the system is mostly idle.
Apparently, acpi-cpufreq doesn’t show any output at all, except:
acpi-cpufreq: overriding BIOS provided _PSD data
My suggestion would be to make powernow-k8 check for the availability of
acpi-cpufreq and print out a warning should it not be available.
And I also suggest a short “acpi-cpufreq is used for frequency scaling” so one
can see that it was loaded alright.
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* [Bug 51741] powernow-k8 calls for acpi-cpufreq but doesn’t warn if it’s not available
2012-12-16 16:03 [Bug 51741] New: powernow-k8 calls for acpi-cpufreq but doesn’t warn if it’s not available bugzilla-daemon
@ 2012-12-16 16:13 ` bugzilla-daemon
2013-01-24 22:18 ` bugzilla-daemon
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: bugzilla-daemon @ 2012-12-16 16:13 UTC (permalink / raw)
To: cpufreq
https://bugzilla.kernel.org/show_bug.cgi?id=51741
Andreas <linuxuser330250@gmx.net> changed:
What |Removed |Added
----------------------------------------------------------------------------
Kernel Version| |3.7.0
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* [Bug 51741] powernow-k8 calls for acpi-cpufreq but doesn’t warn if it’s not available
2012-12-16 16:03 [Bug 51741] New: powernow-k8 calls for acpi-cpufreq but doesn’t warn if it’s not available bugzilla-daemon
2012-12-16 16:13 ` [Bug 51741] " bugzilla-daemon
@ 2013-01-24 22:18 ` bugzilla-daemon
2013-01-26 10:50 ` bugzilla-daemon
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: bugzilla-daemon @ 2013-01-24 22:18 UTC (permalink / raw)
To: cpufreq
https://bugzilla.kernel.org/show_bug.cgi?id=51741
Andreas <linuxuser330250@gmx.net> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |PATCH_ALREADY_AVAILABLE
--- Comment #1 from Andreas <linuxuser330250@gmx.net> 2013-01-24 22:18:27 ---
This should be fixed now.
The patch titled
powernow-k8: Add a kconfig dependency on acpi-cpufreq
was added to the 3.7-stable tree.
The filename of the patch is:
powernow-k8-add-a-kconfig-dependency-on-acpi-cpufreq.patch
and it can be found in the queue-3.7 subdirectory.
Since 3.7.4 is already out, I assume it will be part of 3.7.5 and later.
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* [Bug 51741] powernow-k8 calls for acpi-cpufreq but doesn’t warn if it’s not available
2012-12-16 16:03 [Bug 51741] New: powernow-k8 calls for acpi-cpufreq but doesn’t warn if it’s not available bugzilla-daemon
2012-12-16 16:13 ` [Bug 51741] " bugzilla-daemon
2013-01-24 22:18 ` bugzilla-daemon
@ 2013-01-26 10:50 ` bugzilla-daemon
2013-02-08 18:32 ` bugzilla-daemon
2013-02-12 20:12 ` bugzilla-daemon
4 siblings, 0 replies; 6+ messages in thread
From: bugzilla-daemon @ 2013-01-26 10:50 UTC (permalink / raw)
To: cpufreq
https://bugzilla.kernel.org/show_bug.cgi?id=51741
Florian Mickler <florian@mickler.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |florian@mickler.org
--- Comment #2 from Florian Mickler <florian@mickler.org> 2013-01-26 10:50:08 ---
A patch referencing this bug report has been merged in Linux v3.8-rc5:
commit 631e8ac18fd59722e7ceb15fceeef3f368c250f9
Author: Borislav Petkov <bp@suse.de>
Date: Fri Jan 18 00:19:37 2013 +0100
powernow-k8: Add a kconfig dependency on acpi-cpufreq
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* [Bug 51741] powernow-k8 calls for acpi-cpufreq but doesn’t warn if it’s not available
2012-12-16 16:03 [Bug 51741] New: powernow-k8 calls for acpi-cpufreq but doesn’t warn if it’s not available bugzilla-daemon
` (2 preceding siblings ...)
2013-01-26 10:50 ` bugzilla-daemon
@ 2013-02-08 18:32 ` bugzilla-daemon
2013-02-12 20:12 ` bugzilla-daemon
4 siblings, 0 replies; 6+ messages in thread
From: bugzilla-daemon @ 2013-02-08 18:32 UTC (permalink / raw)
To: cpufreq
https://bugzilla.kernel.org/show_bug.cgi?id=51741
Len Brown <lenb@kernel.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |CLOSED
CC| |lenb@kernel.org
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* [Bug 51741] powernow-k8 calls for acpi-cpufreq but doesn’t warn if it’s not available
2012-12-16 16:03 [Bug 51741] New: powernow-k8 calls for acpi-cpufreq but doesn’t warn if it’s not available bugzilla-daemon
` (3 preceding siblings ...)
2013-02-08 18:32 ` bugzilla-daemon
@ 2013-02-12 20:12 ` bugzilla-daemon
4 siblings, 0 replies; 6+ messages in thread
From: bugzilla-daemon @ 2013-02-12 20:12 UTC (permalink / raw)
To: cpufreq
https://bugzilla.kernel.org/show_bug.cgi?id=51741
Frédéric L. W. Meunier <others@fredlwm.net> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |others@fredlwm.net
--- Comment #3 from Frédéric L. W. Meunier <others@fredlwm.net> 2013-02-12 20:12:41 ---
After running 'make oldconfig' from 3.7.3 to 3.7.7, it silently removed the
"CONFIG_X86_POWERNOW_K8=m" line from .config.
I would expect it to add the new dependencies.
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