Bug 183404 - Kernel 2.6.15-1.1831_FC4smp only detecing 3 CPUs on a 4 CPU (HT) system
Summary: Kernel 2.6.15-1.1831_FC4smp only detecing 3 CPUs on a 4 CPU (HT) system
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Fedora
Classification: Fedora
Component: kernel
Version: 4
Hardware: i686
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Dave Jones
QA Contact: Brian Brock
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2006-02-28 21:26 UTC by James Wilson
Modified: 2015-01-04 22:25 UTC (History)
2 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2006-07-16 04:11:26 UTC
Type: ---
Embargoed:


Attachments (Terms of Use)
dmesg Boot Log and /proc/cpuinfo (24.30 KB, text/plain)
2006-02-28 21:26 UTC, James Wilson
no flags Details

Description James Wilson 2006-02-28 21:26:45 UTC
Description of problem:

On a dual Xeon 2.4GHz machine, with HT turned on, only 3 CPUs are found.  Errors
in dmesg show symptoms (see attachment).

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

Linux 2.6.15-1.1831_FC4smp #1 SMP Tue Feb 7 13:48:31 EST 2006 i686 i686 GNU/Linux

How reproducible:


Steps to Reproduce:
1. Install Kernel 2.6.15-1.1831_FC4smp
2. Reboot
3. Check dmesg log
  
Actual results:

Only 3 CPUs detected

Expected results:

4 CPUs detected

Additional info:

Comment 1 James Wilson 2006-02-28 21:26:45 UTC
Created attachment 125424 [details]
dmesg Boot Log and /proc/cpuinfo

Comment 2 Dave Jones 2006-05-29 03:44:30 UTC
Is this still a problem on the 2.6.16 based kernels ?
If so, can you attach your dmesg ?


Comment 3 James Wilson 2006-07-11 16:15:31 UTC
No, the problem only presented itself on kernel 2.6.15-1.1831_FC4smp.  All
subsequent updates have worked as expected.


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