Note: This is a beta release of Red Hat Bugzilla 5.0. The data contained within is a snapshot of the live data so any changes you make will not be reflected in the production Bugzilla. Also email is disabled so feel free to test any aspect of the site that you want. File any problems you find or give feedback here.
Bug 232842 - soft lockup when running 'service cpuspeed stop'
Summary: soft lockup when running 'service cpuspeed stop'
Alias: None
Product: Fedora
Classification: Fedora
Component: kernel
Version: rawhide
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Kernel Maintainer List
QA Contact: Brian Brock
: 232903 233225 (view as bug list)
Depends On:
TreeView+ depends on / blocked
Reported: 2007-03-18 18:36 UTC by Mads Villadsen
Modified: 2007-11-30 22:11 UTC (History)
5 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2007-03-24 17:59:52 UTC

Attachments (Terms of Use)
kernel stack trace from soft lockup (deleted)
2007-03-18 18:36 UTC, Mads Villadsen
no flags Details
output of /proc/cpuinfo && uname -mrp (deleted)
2007-03-20 11:44 UTC, Julius B.
no flags Details

Description Mads Villadsen 2007-03-18 18:36:47 UTC
Description of problem:
A soft lockup occurs when stopping the cpuspeed daemon.

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. service cpuspeed stop (or attempt to shutdown computer)
2. the attached soft lockup occurs.

Comment 1 Mads Villadsen 2007-03-18 18:36:47 UTC
Created attachment 150339 [details]
kernel stack trace from soft lockup

Comment 2 Jarod Wilson 2007-03-19 13:50:59 UTC
Can you please give us some details as to what sort of system you're seeing this
on? (System vendor, cpu type, whether or not you're running the latest bios for
it, etc).

Comment 3 Jarod Wilson 2007-03-19 14:10:08 UTC
*** Bug 232903 has been marked as a duplicate of this bug. ***

Comment 4 Ralf Ertzinger 2007-03-19 16:50:15 UTC
Seeing this on an IBM ThinkPad X60s, Core Duo, 1.66GHz.


This is the first kernel to show this.

Comment 5 Mads Villadsen 2007-03-19 17:50:27 UTC
I am seeing it on a Dell Latitude D820, Centrino Duo 1.8GHz. Do you want the
output from /proc/cpuinfo as well?

Comment 6 Julius B. 2007-03-20 11:44:40 UTC
Created attachment 150475 [details]
output of /proc/cpuinfo && uname -mrp

Don't know if you need it :-)

Comment 7 Jarod Wilson 2007-03-20 21:24:02 UTC
Okay, seems the breakage is Intel's fault, but they're looking into it, so just
sit tight and it ought to be sorted out shortly... :)

Comment 8 Jarod Wilson 2007-03-21 02:42:49 UTC
*** Bug 233225 has been marked as a duplicate of this bug. ***

Comment 9 Skip Palin 2007-03-21 12:31:42 UTC
So i have an AuthenticAMD can we still blame Intel?
vendor_id       : AuthenticAMD
cpu family      : 15
model           : 95
model name      : AMD Athlon(tm) 64 Processor 3200+
stepping        : 2
cpu MHz         : 1000.000
cache size      : 512 KB
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
pat pse36 clflush mmx fxsr sse sse2 syscall nx mmxext fxsr_opt rdtscp lm
3dnowext 3dnow pni cx16 lahf_lm svm extapic cr8_legacy
bogomips        : 2005.75
TLB size        : 1024 4K pages
clflush size    : 64
cache_alignment : 64
address sizes   : 40 bits physical, 48 bits virtual
power management: ts fid vid ttp tm stc

2.6.20-1.2999.fc7 x86_64 x86_64

Comment 10 Jarod Wilson 2007-03-21 13:50:26 UTC
Yep, these code changes were done in the frequency scaling code, not in any
intel-processor-specific code. From what davej tells me, w/o the change they
made, the ondemand governor was waking up about 100 times per second to do
pretty much nothing, so humorously, power saving code was needlessly sucking up
extra power. The attempted fix obviously wasn't quite complete and/or uncovered
another problem, which is being worked on now... :)

Comment 11 Julius B. 2007-03-23 21:49:22 UTC
Okay, after the update from 2999 to 3016 it works now correctly. So from my
point of view it's closed.

Comment 12 Mads Villadsen 2007-03-24 08:04:08 UTC
It also works so me now.

Comment 13 Skip Palin 2007-03-25 01:04:52 UTC
Works for me

Note You need to log in before you can comment on or make changes to this bug.