Bug 675270

Summary: GFS2: Fails to clear glocks during unmount
Product: Red Hat Enterprise Linux 6 Reporter: Abhijith Das <adas>
Component: kernelAssignee: Steve Whitehouse <swhiteho>
Status: CLOSED ERRATA QA Contact: Cluster QE <mspqa-list>
Severity: unspecified Docs Contact:
Priority: high    
Version: 6.1CC: adas, rwheeler
Target Milestone: rc   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: kernel-2.6.32-117.el6 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2011-05-23 20:39:14 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Attachments:
Description Flags
Patch to fix the issue none

Description Abhijith Das 2011-02-04 18:32:37 UTC 
Description of problem:
While testing quotacheck, I found that gfs2 reported the following messages on the console during unmount/rmmod. I was updating a bunch of quotas and immediately unmounting the fs and attempting to remove the module.

 G:  s:EX n:8/23b2 f:lDpIq t:UN d:UN/2000 a:0 r:2
 G:  s:EX n:8/21e5 f:lDprIq t:UN d:UN/6000 a:0 r:3
 G:  s:SH n:8/2b f:lDpIq t:UN d:UN/11000 a:0 r:2
 G:  s:EX n:8/1cfc f:lDprIq t:UN d:UN/15000 a:0 r:3
 G:  s:UN n:8/5da f:Iq t:UN d:EX/0 a:0 r:0
slab error in kmem_cache_destroy(): cache `gfs2_glock(aspace)': Can't free all objects
Pid: 4832, comm: rmmod Not tainted 2.6.32 #1
Call Trace:
 [<ffffffff811537cb>] kmem_cache_destroy+0xbb/0xf0
 [<ffffffffa0a60946>] exit_gfs2_fs+0x84/0x97 [gfs2]
 [<ffffffff810a4824>] sys_delete_module+0x194/0x260
 [<ffffffff8100b172>] system_call_fastpath+0x16/0x1b
slab error in kmem_cache_destroy(): cache `gfs2_glock': Can't free all objects
Pid: 4832, comm: rmmod Not tainted 2.6.32 #1
Call Trace:
 [<ffffffff811537cb>] kmem_cache_destroy+0xbb/0xf0
 [<ffffffffa0a60952>] exit_gfs2_fs+0x90/0x97 [gfs2]
 [<ffffffff810a4824>] sys_delete_module+0x194/0x260
 [<ffffffff8100b172>] system_call_fastpath+0x16/0x1b
Comment 2 Steve Whitehouse 2011-02-04 18:39:09 UTC 
Created attachment 477088 [details]
Patch to fix the issue

This was an omission from the vfs scale patch which needs to be fixed as soon as possible.
Comment 3 RHEL Program Management 2011-02-04 18:50:36 UTC 
This request was evaluated by Red Hat Product Management for inclusion
in a Red Hat Enterprise Linux maintenance release. Product Management has 
requested further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed 
products. This request is not yet committed for inclusion in an Update release.
Comment 4 Abhijith Das 2011-02-05 05:07:19 UTC 
Verified that with the patch in comment#2, I no longer see the glock/slab messages mentioned above. Posting to rhkernel-list for inclusion in rhel6.1
Comment 5 Aristeu Rozanski 2011-02-18 22:20:36 UTC 
Patch(es) available on kernel-2.6.32-117.el6
Comment 8 Nate Straz 2011-04-08 11:19:51 UTC 
This has not showed up in recent regression runs with kernel-2.6.32-128.el6.
Comment 9 errata-xmlrpc 2011-05-23 20:39:14 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-2011-0542.html