Bug 1460653

Summary:	"ODEBUG: 40 of 40 active objects replaced" shows when first logging in realtime guest with kernel-rt-debug
Product:	Red Hat Enterprise Linux 7	Reporter:	Pei Zhang <pezhang>
Component:	abrt	Assignee:	abrt <abrt-devel-list>
Status:	CLOSED NOTABUG	QA Contact:	BaseOS QE - Apps <qe-baseos-apps>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	7.4	CC:	chayang, juzhang, lcapitulino, lgoncalv, michen
Target Milestone:	rc
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2017-06-14 00:48:49 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:
Embargoed:

Description Pei Zhang 2017-06-12 10:39:47 UTC

Description of problem:
Install kernel-rt-debug in both host and guest. When first logging in rt guest by #ssh, 'ODEBUG: 40 of 40 active objects replaced' will be reported by abrt by guest. This problem only shows when first logging in guest, next several log in works well. 

Version-Release number of selected component (if applicable):
3.10.0-679.rt56.602.el7.x86_64.debug(in both host&guest)
qemu-kvm-rhev-2.9.0-7.el7.x86_64
libvirt-3.2.0-6.el7.x86_64
tuned-2.8.0-4.el7.noarch

How reproducible:
100%

Steps to Reproduce:

1. Boot rt host with kernel-rt-debug
2. Boot rt guest with kernel-rt-debug
3. Log in rt guest by #ssh, "ODEBUG: 40 of 40 active objects replaced" shows in terminal.

Actual results:
# ssh 10.73.75.76
root.75.76's password: 
Last login: Thu Jun  8 10:35:07 2017 from 10.66.60.114
ABRT has detected 1 problem(s). For more info run: abrt-cli list --since 1496889307

# abrt-cli list --since 1496889307
id 1eef41877a6c320527c5ff00022df70b7eff5338
reason:         ODEBUG: 40 of 40 active objects replaced
time:           Thu 08 Jun 2017 10:47:15 AM CST
cmdline:        BOOT_IMAGE=/vmlinuz-3.10.0-679.rt56.602.el7.x86_64.debug root=/dev/mapper/rhel_bootp--73--75--76-root ro console=tty0 console=ttyS0,115200n8 biosdevname=0 crashkernel=auto rd.lvm.lv=rhel_bootp-73-75-76/root rd.lvm.lv=rhel_bootp-73-75-76/swap rhgb quiet default_hugepagesz=1G LANG=en_US.UTF-8 isolcpus=1,2,3,4,5,6,7,8 intel_pstate=disable nosoftlockup skew_tick=1 nohz=on nohz_full=1,2,3,4,5,6,7,8 rcu_nocbs=1,2,3,4,5,6,7,8
package:        kernel
uid:            0 (root)
Directory:      /var/spool/abrt/oops-2017-06-08-10:47:15-933-0
Run 'abrt-cli report /var/spool/abrt/oops-2017-06-08-10:47:15-933-0' for creating a case in Red Hat Customer Portal


Expected results:
Should no problem warning shows.


Additional info:

Comment 1 Luiz Capitulino 2017-06-12 13:03:01 UTC

So, "ODEBUG: 40 of 40 active objects replaced" is all that's printed? Is this just an abrt debug message?

Comment 2 Luis Claudio R. Goncalves 2017-06-12 13:39:08 UTC

This message is just a _debug_ notification to tell you that the statically allocated objects were successfully converted into dynamic ones. This is not even a warning, just a debug note. You see this message because IIRC the debug kernels has the console on a very verbose mode by default.


From lib/debugobjects.c:


/*
 * Convert the statically allocated objects to dynamic ones:
 */
static int __init debug_objects_replace_static_objects(void)

   ...

   printk(KERN_DEBUG "ODEBUG: %d of %d active objects replaced\n", cnt,
               obj_pool_used);


If this message is all you see, this ticket can be safely closed as NOTABUG.

Comment 3 Pei Zhang 2017-06-14 00:48:49 UTC

(In reply to Luiz Capitulino from comment #1)
> So, "ODEBUG: 40 of 40 active objects replaced" is all that's printed? Is
> this just an abrt debug message?

Yes, it's the only message printed.

(In reply to Luis Claudio R. Goncalves from comment #2)
> This message is just a _debug_ notification to tell you that the statically
> allocated objects were successfully converted into dynamic ones. This is not
> even a warning, just a debug note. You see this message because IIRC the
> debug kernels has the console on a very verbose mode by default.
> 
> 
> From lib/debugobjects.c:
> 
> 
> /*
>  * Convert the statically allocated objects to dynamic ones:
>  */
> static int __init debug_objects_replace_static_objects(void)
> 
>    ...
> 
>    printk(KERN_DEBUG "ODEBUG: %d of %d active objects replaced\n", cnt,
>                obj_pool_used);
> 
> 
> If this message is all you see, this ticket can be safely closed as NOTABUG.

Get it. Thanks. Close this bug as 'NOTABUG'.



Thanks,
Pei