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Bug 73353

Summary: kernel panic on raidstop
Product: Red Hat Enterprise Linux 2.1 Reporter: Nick (Gunnar) Bluth <bluth>
Component: raidtoolsAssignee: Larry Woodman <lwoodman>
Status: CLOSED ERRATA QA Contact: David Lawrence <dkl>
Severity: medium Docs Contact:
Priority: medium    
Version: 2.1Keywords: Security
Target Milestone: ---   
Target Release: ---   
Hardware: i686   
OS: Linux   
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2003-07-10 08:22:52 EDT Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---
Bug Depends On: 73356    
Bug Blocks:    
Description Flags
Dump of the observation of /proc/mdstat and the kernel panic none

Description Nick (Gunnar) Bluth 2002-09-03 08:28:27 EDT
From Bugzilla Helper:
User-Agent: Mozilla/5.0 (compatible; Konqueror/3; Linux)

Description of problem:
Doing some experiments with the SAN here. After seeing that syncing 2 RAID 1's simultaneously is very slow, I wanted to speed things up a bit and did a raidstop /dev/md0
Result: kernel panic (see attachment)

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

How reproducible:

Steps to Reproduce:
1. Make two RAID 1's (/dev/md[01]) using sd[ac]1 and sd[bd]1
on 4 logical drives on a LSI storage (~73 GB each) connected via QLogic 2300 HBA (driven by qla2x00.o)
2. Do a mkraid -R /dev/md[01]
3. Do a raidstop /dev/md1

Actual Results:  Kernel panic

Expected Results:  Obvious.....

Additional info:

Compaq DL 580, 4xXeon 700, 4 GB, Onboard Smart-2
2x Qlogic 2300 FC HBA
Comment 1 Nick (Gunnar) Bluth 2002-09-03 08:31:45 EDT
Created attachment 74684 [details]
Dump of the observation of /proc/mdstat and the kernel panic
Comment 2 Arjan van de Ven 2002-09-03 08:33:36 EDT
qla2x00.o panics.. film at 11...at least it didn't eat your data this time.
 Why aren't you using qla2300.o ?
Comment 3 Nick (Gunnar) Bluth 2002-09-03 09:39:31 EDT
Well, see #73356 
I just did it again without watching /proc/mdstat, and it worked...
Comment 4 Nick (Gunnar) Bluth 2002-09-06 09:00:42 EDT
Ok, I think I have to apologize...  
I just learned that the SAN guys made the four disks a 2x2 mirror, 
although they explicitly told me they hadn't...  
This explains some of the problems I had...  
Nevertheless, I think the issue concerning "raidstop" while having a   
"while true; do grep sync /proc/mdstat ; sleep 1 ; echo; done" 
seems to be generic to me... 
Comment 5 Larry Woodman 2003-06-23 13:32:50 EDT
This has been fixed in the e.12 kernel errata that was released 
at the beginning of this year.

Larry Woodman