Bug 133232

Summary:	slab error in kmem_cache_destroy() when rmmodding dlm
Product:	[Retired] Red Hat Cluster Suite	Reporter:	Derek Anderson <danderso>
Component:	gfs	Assignee:	Christine Caulfield <ccaulfie>
Status:	CLOSED CURRENTRELEASE	QA Contact:	GFS Bugs <gfs-bugs>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	4	CC:	teigland
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2004-10-04 19:32:57 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 Derek Anderson 2004-09-22 17:06:24 UTC

Description of problem:
Set up a quorate 5-node cluster and mounted a filesystem on all with
lock type lock_dlm.  On all: unmounted the filesystem, removed from
fence domain, left cman, killed ccsd, and removed modules in the
reverse order they went in.

When removing the dlm module I got this on 3 of the 5 nodes:
slab error in kmem_cache_destroy(): cache `dlm_resdir(s)': Can't free
all objects
 [<c01467a1>] kmem_cache_destroy+0xd1/0x120
 [<d09be068>] dlm_memory_exit+0x28/0x40 [dlm]
 [<d09c6c94>] cleanup_module+0x14/0x1e [dlm]
 [<c01375d1>] sys_delete_module+0x121/0x170
 [<c015007a>] unmap_vma_list+0x1a/0x30
 [<c0150408>] do_munmap+0x118/0x160
 [<c011b950>] do_page_fault+0x0/0x4fc
 [<c0105e4d>] sysenter_past_esp+0x52/0x71



Version-Release number of selected component (if applicable):
cman_tool DEVEL.1095793251 (built Sep 21 2004 14:03:18)
Copyright (C) Red Hat, Inc.  2004  All rights reserved.

How reproducible:
I'm 2 for 2 so far.

Steps to Reproduce:
1.
2.
3.
  
Actual results:


Expected results:


Additional info:

Comment 1 Christine Caulfield 2004-09-23 13:23:26 UTC

Yep. I saw that too....

Comment 2 Christine Caulfield 2004-09-23 14:22:35 UTC

Unused direntries were being put on a free list when they were
released suring recovery, but this free list was not cleaned when the
lockspace was released.

It is now.

Checking in dir.c;
/cvs/cluster/cluster/dlm-kernel/src/dir.c,v  <--  dir.c
new revision: 1.18; previous revision: 1.17
done
Checking in dir.h;
/cvs/cluster/cluster/dlm-kernel/src/dir.h,v  <--  dir.h
new revision: 1.10; previous revision: 1.9
done
Checking in lockspace.c;
/cvs/cluster/cluster/dlm-kernel/src/lockspace.c,v  <--  lockspace.c
new revision: 1.15; previous revision: 1.14
done

Comment 3 Derek Anderson 2004-10-04 19:32:57 UTC

Verified against:
DEVEL.1096898839 (built Oct  4 2004 09:08:29)

Comment 4 Kiersten (Kerri) Anderson 2004-11-16 19:10:53 UTC

Updating version to the right level in the defects.  Sorry for the storm.