Bug 710642

Summary: GFS2: inode glock stuck without holder
Product: Red Hat Enterprise Linux 6 Reporter: Ken Reilly <kreilly>
Component: kernelAssignee: Frantisek Hrbata <fhrbata>
Status: CLOSED ERRATA QA Contact: Red Hat Kernel QE team <kernel-qe>
Severity: medium Docs Contact:
Priority: high    
Version: 6.0CC: adas, bmarzins, bturner, ccaulfie, dhoward, jkortus, jwest, nstraz, pm-eus, rpeterso, rwheeler, scooter, swhiteho, teigland
Target Milestone: rcKeywords: ZStream
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: kernel-2.6.32-71.33.1.el6 Doc Type: Bug Fix
Doc Text:
When the Distributed Lock Manager (DLM) queued three callbacks for a lock in the following sequence: blocking - completion - blocking, it would consider the final blocking callback redundant and skip it. Because the callback was skipped, GFS would not release the lock, causing processes on other nodes to wait indefinitely for it. With this update, the DLM does not skip the necessary blocking callback.
Story Points: ---
Clone Of: Environment:
Last Closed: 2011-08-02 16:54:42 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: 635041    
Bug Blocks:    

Description Ken Reilly 2011-06-03 21:35:51 UTC
This bug has been copied from bug #635041 and has been proposed
to be backported to 6.0 z-stream (EUS).

Comment 8 errata-xmlrpc 2011-08-02 16:54:42 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/RHSA-2011-1106.html

Comment 9 Martin Prpič 2011-08-18 14:42:07 UTC
    Technical note added. If any revisions are required, please edit the "Technical Notes" field
    accordingly. All revisions will be proofread by the Engineering Content Services team.
    
    New Contents:
When the Distributed Lock Manager (DLM) queued three callbacks for a lock
in the following sequence: blocking - completion - blocking, it would
consider the final blocking callback redundant and skip it. Because the
callback was skipped, GFS would not release the lock, causing processes on
other nodes to wait indefinitely for it. With this update, the DLM does not
skip the necessary blocking callback.