Bug 183404

Summary: Kernel 2.6.15-1.1831_FC4smp only detecing 3 CPUs on a 4 CPU (HT) system
Product: [Fedora] Fedora Reporter: James Wilson <james.wilson77>
Component: kernelAssignee: Dave Jones <davej>
Status: CLOSED ERRATA QA Contact: Brian Brock <bbrock>
Severity: medium Docs Contact:
Priority: medium    
Version: 4CC: pfrields, wtogami
Target Milestone: ---   
Target Release: ---   
Hardware: i686   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2006-07-16 04:11:26 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Attachments:
Description Flags
dmesg Boot Log and /proc/cpuinfo none

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.