Bug 501011

Summary: Fedora 10 32bit can not install if total CPU cores > 8
Product: [Fedora] Fedora Reporter: Bhavna Sarathy <bhavna.sarathy>
Component: kernelAssignee: Kernel Maintainer List <kernel-maint>
Status: CLOSED ERRATA QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: low    
Version: 10CC: itamar, kernel-maint, quintela, rdoty
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: 2009-05-21 00:27:37 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
core enumeration in dmesg, shows 8 core limit
none
NR CPUs is set to 32, theoritically the OS should be able to enumerate 12 CPUs none

Description Bhavna Sarathy 2009-05-15 14:04:24 UTC
Created attachment 344152 [details]
core enumeration in dmesg, shows 8 core limit

Description of problem:
Install Fedora 10 32-bit on a Toonie 2 socket system with Istanbul processors 
This system has 12 cores that should be enumerated.

Version-Release number of selected component (if applicable):
Redhat Fedora 10 32-bit (Kernel 2.6.27.5-117)

How reproducible:
everytime

Steps to Reproduce:
1.Install Fedora 10 32-bit
2.Reboot 
3.Check /proc/cpuinfo and dmesg for number of cores enumerated
  
Actual results:
Only 8 cores are enumerated

Expected results:
All 12 cores need to be enumerated.

Additional info:

Comment 1 Bhavna Sarathy 2009-05-15 14:12:19 UTC
Created attachment 344154 [details]
NR CPUs is set to 32, theoritically the OS should be able to enumerate 12 CPUs

Comment 2 Bhavna Sarathy 2009-05-15 14:14:03 UTC
In older RHEL kernels (2.6.9) a large-smp kernel had to be used to enumerate >8 core count systems.   However I wouldn't think that Fedora 10 would have such limitations.

Comment 3 Bhavna Sarathy 2009-05-15 14:49:01 UTC
Modifying steps to reproduce, as there is an issue installing the OS on Toonie.

Steps to Reproduce:
1.Install Fedora 10 32-bit
2.Install fails

Comment 4 Chuck Ebbert 2009-05-18 06:15:44 UTC
This was fixed in an update, kernels after 2.6.27.15-170.2.20 will detect up to 32 processors.

Comment 5 Bhavna Sarathy 2009-05-18 13:41:21 UTC
Great.   I'm not familiar with Fedora updates; I need a link or instructions to pass on to AMD QA.

Thanks,
Bhavna

Comment 6 Chuck Ebbert 2009-05-21 00:27:37 UTC
(In reply to comment #5)
> Great.   I'm not familiar with Fedora updates; I need a link or instructions to
> pass on to AMD QA.
> 

Open a command window and run the command 'yum update kernel' as root.


Or install the latest respin if you want to test new installs:
http://fedoraunity.org/news-archives/fedora-unity-releases-fedora-10-re-spin

I can't help with how to download the respin and make the install discs though.


Marking this bug as fixed by the kernel update, reopen the bug if it doesn't work.