Bug 122982

Summary: microcode_ctl errors with modprobe: Can't locate module char-major-10-184
Product: Red Hat Enterprise Linux 3 Reporter: Ambrose Earle <ambrose_earle>
Component: kernelAssignee: Ernie Petrides <petrides>
Status: CLOSED ERRATA QA Contact: Brian Brock <bbrock>
Severity: medium Docs Contact:
Priority: medium    
Version: 3.0CC: astokes, jparadis, petrides
Target Milestone: ---   
Target Release: ---   
Hardware: i686   
OS: Linux   
Whiteboard:
Fixed In Version: RHSA-2005-663 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2005-09-28 14:23:04 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:
Bug Depends On:    
Bug Blocks: 156320    

Description Ambrose Earle 2004-05-10 23:19:35 UTC
From Bugzilla Helper:
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Description of problem:
When booting with kernel-hugemem-2.4.21-9.0.3.EL, microcode_ctl fails 
with Can't locate module char-major-10-184.  When run manually, you 
receive microcode_ctl: cannot open /dev/cpu/0/microcode for writing 
errno=19 (No such device).  This does not fail on the standard or SMP 
kernels.




Version-Release number of selected component (if applicable):
kernel-utils-2.4-8.37.1

How reproducible:
Always

Steps to Reproduce:
1. Boot with hugemem kernel
2. Watch console for error
3. execute microcode_ctl -u
    

Actual Results:  microcode_ctl: writing microcode (length: 141312)
microcode_ctl: cannot open /dev/cpu/0/microcode for writing errno=19 
(No such device)

Expected Results:  no error, microcode updated

Additional info:

Dell PowerEdge 2650
2.4.21-9.0.3.ELhugemem #1 SMP Tue Apr 20 19:43:45 EDT 2004 i686 i686 
i386 GNU/Linux
/dev/cpu/0/microcode: character special (10/184)

Comment 1 Ernie Petrides 2004-10-26 21:44:10 UTC
The problem is that arch/i386/kernel/microcode.o is listed in
linux-modules-unsupported-hugemem.  I'm not sure why this is,
but it looks like we should remove it.  I'll investigate this.


Comment 2 Ernie Petrides 2005-06-09 03:26:52 UTC
A fix for this problem has just been committed to the RHEL3 U6
patch pool this evening (in kernel version 2.4.21-32.7.EL).


Comment 8 Ernie Petrides 2005-09-01 01:47:43 UTC
*** Bug 132754 has been marked as a duplicate of this bug. ***

Comment 10 Red Hat Bugzilla 2005-09-28 14:23:04 UTC
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2005-663.html