Bug 887228

Summary: deadlock in lvmetad
Product: Red Hat Enterprise Linux 6 Reporter: Marian Csontos <mcsontos>
Component: lvm2Assignee: Petr Rockai <prockai>
Status: CLOSED ERRATA QA Contact: Cluster QE <mspqa-list>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 6.4CC: agk, cmarthal, dwysocha, heinzm, jbrassow, msnitzer, prajnoha, prockai, thornber, tlavigne, zkabelac
Target Milestone: rcKeywords: Reopened
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: lvm2-2.02.98-6.el6 Doc Type: Bug Fix
Doc Text:
A nested mutex lock could result in a deadlock in lvmetad, leading to a lockup (hang) in LVM commands trying to talk to lvmetad. The nested lock has been removed, avoiding the possibility of a deadlock.
Story Points: ---
Clone Of: Environment:
Last Closed: 2013-02-21 08:15:26 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Bug Depends On:    
Bug Blocks: 895654    
Attachments:
Description Flags
gdb output none

Description Marian Csontos 2012-12-14 11:35:51 UTC
Created attachment 663522 [details]
gdb output

Description of problem:
deadlock in lvmetad

Version-Release number of selected component (if applicable):
lvm2-2.02.98-5.15.el6_4

How reproducible:
???

Steps to Reproduce:
1. ???
  
Actual results:
deadlock

Expected results:
pass

Additional info:

There were one `lvs -a -o +devices` and few `/sbin/lvm pvscan --cache --activate ay --major %d --minor %d` commands spawned by udev.

Comment 3 Petr Rockai 2012-12-16 23:54:40 UTC
I have (hopefully) fixed the bug in fae1a611d2f907aa23c237b9f84df5089d30f728. A related fix is in 5294a6f77a900493b3e81eb70c1698ec3c4814b8. I would suggest both to be included in 6.4. No special QA treatment is required (the bug is exposed by existing testcases, it just triggers rarely).

Comment 4 Peter Rajnoha 2012-12-17 16:10:17 UTC
The latest scratch build that includes those two patches:
https://brewweb.devel.redhat.com/taskinfo?taskID=5198439

Comment 6 RHEL Program Management 2012-12-17 17:56:42 UTC
Quality Engineering Management has reviewed and declined this request.
You may appeal this decision by reopening this request.

Comment 10 errata-xmlrpc 2013-02-21 08:15:26 UTC
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHBA-2013-0501.html