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Bug 513285

Summary:	fcntl(GETLK) does not free unused resource
Product:	Red Hat Enterprise Linux 5	Reporter:	David Teigland <teigland>
Component:	cman	Assignee:	David Teigland <teigland>
Status:	CLOSED ERRATA	QA Contact:	Cluster QE <mspqa-list>
Severity:	medium	Docs Contact:
Priority:	low
Version:	5.3	CC:	adas, ccaulfie, cluster-maint, djansa, edamato, jkortus
Target Milestone:	rc
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	cman-2.0.115-9.el5.rpm	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2010-03-30 08:42:21 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 David Teigland 2009-07-22 20:33:43 UTC

Description of problem:

If a plock resource does not exist in gfs_controld, (no posix locks exist on a file), fcntl(GETLK) on that file will cause the resource to be created, but not removed afterward.

Apps that do a lot of GETLK tests on a lot of files that have no locks on them will cause gfs_controld's list of resources to grow large, and the daemon will spend a lot of time searching it.

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


How reproducible:


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Additional info:

Comment 1 David Teigland 2009-07-22 20:36:33 UTC

Abhi found this problem by running smbtorture/NBENCH on gfs+ctdb with fs file locks enabled.

The problem does not exist if plock_ownership="1".

Comment 2 David Teigland 2009-07-22 20:46:28 UTC

fix pushed to RHEL5 branch

http://git.fedorahosted.org/git/cluster.git?p=cluster.git;a=commitdiff;h=f106b915e18e2323f549fbbf0e956c0ee884fb2e

Comment 8 errata-xmlrpc 2010-03-30 08:42:21 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-2010-0266.html