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Bug 480838

Summary: specifying major/minor options results in failed snapshot create
Product: Red Hat Enterprise Linux 4 Reporter: Corey Marthaler <cmarthal>
Component: device-mapperAssignee: Milan Broz <mbroz>
Status: CLOSED ERRATA QA Contact: Cluster QE <mspqa-list>
Severity: medium Docs Contact:
Priority: low    
Version: 4.8CC: agk, christophe.varoqui, dwysocha, edamato, egoggin, heinzm, jbrassow, junichi.nomura, kueda, lmb, mbroz, prajnoha, prockai, pvrabec, syeghiay, tranlan
Target Milestone: rcKeywords: Regression
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2009-05-18 20:08:37 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:

Description Corey Marthaler 2009-01-20 20:17:29 UTC 
Description of problem:
I saw this regression when attempting to verify the fix for bug 204992.

[root@grant-03 ~]# lvcreate -n snap1 -My --major 200 --minor 75 -L 50M -s /dev/hayes/origin
  Rounding up size to full physical extent 52.00 MB
  Volume snap1 (200:75) differs from already active device (253:75)
  Aborting. Failed to activate snapshot exception store.
[root@grant-03 ~]# echo $?
5
 
[root@grant-03 ~]# lvcreate -n snap2  -L 50M -s /dev/hayes/origin
  Rounding up size to full physical extent 52.00 MB
  Logical volume "snap2" created


Version-Release number of selected component (if applicable):
2.6.9-78.28.ELsmp

lvm2-2.02.42-2.el4    BUILT: Thu Jan 15 12:48:25 CST 2009


How reproducible:
Every time.
Comment 1 Corey Marthaler 2009-01-20 21:32:01 UTC 
This is related to bug 204997, but unlike in that bug, here the creation actually fails and leaves zombie dm devices around after attempting to remove.
Comment 2 Milan Broz 2009-02-03 14:12:40 UTC 
uf, it is broken completely, not only snapshots.

# lvcreate -n tst -My --major 200 --minor 33 -l 1 vg_test
  Volume tst (200:33) differs from already active device (254:33)
  Aborting. Failed to activate new LV to wipe the start of it.
  Volume tst (200:33) differs from already active device (254:33)
  Unable to deactivate failed new LV. Manual intervention required.

We need ignore to major number for 2.6 kernel when comparing devices device number pairs...
Comment 8 Peter Rajnoha 2009-02-20 11:04:07 UTC 
Committed to CVS, device-mapper-1.02.28-2.el4.
Comment 11 errata-xmlrpc 2009-05-18 20:08:37 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 therefore 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/RHBA-2009-0962.html