Bug 190576

Summary: REGRESSION: kabi breakage on ia64_mv
Product: Red Hat Enterprise Linux 4 Reporter: Doug Chapman <dchapman>
Component: kernelAssignee: Prarit Bhargava <prarit>
Status: CLOSED ERRATA QA Contact: Brian Brock <bbrock>
Severity: medium Docs Contact:
Priority: medium    
Version: 4.0CC: jbaron
Target Milestone: ---   
Target Release: ---   
Hardware: ia64   
OS: Linux   
Whiteboard:
Fixed In Version: RHSA-2006-0575 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2006-08-10 23:14:04 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: 181409    
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Description Flags
Patch to fix kabi breakage in ia64 branch none

Description Doug Chapman 2006-05-03 17:47:00 UTC 
Description of problem:


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

The ia64_mv appears to have changed between U3 and U4.  I am seeing this while
attempting to diagnose an e100 driver issue.  If I install kernel-2.6.9-35 but I
grab the e100 from back in U3 it will not load:


e100: disagrees about version of symbol ia64_mv
e100: Unknown symbol ia64_mv

Steps to Reproduce:
1. Install RHEL4 U3
2. Install kernel-2.6.9-35.ia64.EL
3. replace e100.ko with the one from U3
4. reboot to the new kernel and try modprobe e100

  
Actual results:


Expected results:


Additional info:
Comment 1 Jason Baron 2006-05-03 19:08:44 UTC 
hmmm, this is due to bz #183156, changing type for: ia64_mv_global_tlb_purge_t.
Comment 2 Prarit Bhargava 2006-05-03 19:11:21 UTC 
Jason -- this shouldn't be an issue.  IIRC, the only consumer of this "global"
function is the SN code and SGI was willing to live with the change.

P.
Comment 3 Jason Baron 2006-05-03 19:12:53 UTC 
hmmm, i don't think Doug was testing on sgi h/w
Comment 4 Jason Baron 2006-05-03 19:19:38 UTC 
also, we have a precedent for fixing this:

http://post-office.corp.redhat.com/archives/rhkernel-list/2005-July/msg00504.html
Comment 5 Prarit Bhargava 2006-05-03 19:32:24 UTC 
Yeah -- I think I see the issue.  I'll touch base with Doug when he's in tomorrow.
I have a solution in mind....

P.
Comment 6 Prarit Bhargava 2006-05-04 15:44:19 UTC 
Created attachment 128608 [details]
Patch to fix kabi breakage in ia64 branch

Patch to fix Doug's issue with kabi breakage.  Doug will post testing results
shortly.
Comment 7 Doug Chapman 2006-05-04 15:47:15 UTC 
I have tested this by taking prarit's kernel rpm and replacing the e100.ko
module from U3 as I did before.  The module now loads without any symbol
mismatch complaints.
Comment 8 Jason Baron 2006-05-05 02:32:29 UTC 
committed in stream U4 build 35.2. A test kernel with this patch is available
from http://people.redhat.com/~jbaron/rhel4/
Comment 12 Red Hat Bugzilla 2006-08-10 23:14:06 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-2006-0575.html