Bug 1000158

Summary: blnsrv.exe is pegged at 100% cpu in windows guests
Product: Red Hat Enterprise Linux 6 Reporter: Anitha Udgiri <audgiri>
Component: virtio-winAssignee: Vadim Rozenfeld <vrozenfe>
Status: CLOSED CURRENTRELEASE QA Contact: Virtualization Bugs <virt-bugs>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 6.5CC: acathrow, audgiri, bazulay, bcao, bsarathy, chayang, iheim, juzhang, michen, qzhang, Rhev-m-bugs, rhod, vrozenfe, yeylon
Target Milestone: rcKeywords: OtherQA
Target Release: 6.4   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2014-01-01 16:35:15 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:
Attachments:
Description Flags
blnsvr fixed version none

Description Anitha Udgiri 2013-08-22 20:16:48 UTC
Description of problem:
In some windows 7 and XP guests, blnsrv.exe is pegged at 100% cpu usage. Killing this process in the task manager gets the VM to normal.
There are no errors reported in the logs.

Have asked Customer to disable this service altogether.

Why is this process using 100% cpu? What information can we get to find out the reason?
How do we proceed?

Version-Release number of selected component (if applicable):
RHEV 3.1

Comment 2 Anitha Udgiri 2013-08-23 19:50:43 UTC
Vadim,
    I am attaching the qemu VM logs for the VMs in question for information on qemu command line.

We have requested the Customer for the output of the remaining commands.

Will upload it as soon as we get them.

Comment 6 Mike Cao 2013-08-26 07:22:14 UTC
blnsrv.exe which is used for memory statistis is *not* officially supported in RHEL6 according to https://bugzilla.redhat.com/show_bug.cgi?id=798139 .And Virt-QE do not testing the driver/app we do not support 

So we should remove it from rhev-guest-tools-iso .

Mike

Comment 7 Vadim Rozenfeld 2013-09-17 12:09:20 UTC
should be fixed in build 70

Comment 8 Mike Cao 2013-10-12 10:24:21 UTC
I can not reproduce this issue on virtio-win-prewhql-65

Steps:
1.Start VM on RHEVM3.2 
2.blnsrv -i 

Actual Results:
Guest works fine 


Vadim ,Could you view my steps above ? Any idea how can I reproduce this bug ?

Thanks,
Mike

Comment 9 Vadim Rozenfeld 2013-10-12 11:30:24 UTC
(In reply to Mike Cao from comment #8)
> I can not reproduce this issue on virtio-win-prewhql-65
> 
> Steps:
> 1.Start VM on RHEVM3.2 
> 2.blnsrv -i 
> 
> Actual Results:
> Guest works fine 
> 
> 
> Vadim ,Could you view my steps above ? Any idea how can I reproduce this bug
> ?
> 
Hi Mike,
I have no idea, which additional steps should be taken in order to see
this bug. (I personally have never seen it on any of my systems
In my understanding there was  only one reason why we could get 100%
CPU consumption when we fail to get memory statistics and run into
busy loop. I have fixed this problem falling into sleep even in
WMI query has failed. I was thinking that maybe if QE can reproduce
this problem we will be able to perform some sort of live debugging
exercises on this problem.

Thaks,
Vadim.

> Thanks,
> Mike

Comment 10 Mike Cao 2013-10-14 03:24:29 UTC
Created attachment 811839 [details]
blnsvr fixed version

Comment 11 Mike Cao 2013-10-14 03:27:38 UTC
Hi,Anitha Udgiri

Since QE can not reproduce this isuse .Could you ask customer try to fixed version blnsrv in the bug attachment ?

Thanks a lot,
Mike

Comment 12 Anitha Udgiri 2013-10-15 17:49:18 UTC
(In reply to Mike Cao from comment #11)
> Hi,Anitha Udgiri
> 
> Since QE can not reproduce this isuse .Could you ask customer try to fixed
> version blnsrv in the bug attachment ?
> 
> Thanks a lot,
> Mike

Mike,
   We have asked the Customer if they are willing to try it in their environment and will provide this version upon their positive response.

~Anitha

Comment 13 Miya Chen 2013-10-28 03:01:18 UTC
Hi Anitha, is there any news from customer? Thanks.

Comment 14 Anitha Udgiri 2013-11-04 20:06:10 UTC
(In reply to Miya Chen from comment #13)
> Hi Anitha, is there any news from customer? Thanks.

Hello,
    Unfortunately, the Customer has not responded back on our request and the case appears "closed" on account of inactivity for a long period.

I will ask the case owner to reach out the Customer again and check their feedback/response.

Comment 15 Anitha Udgiri 2013-12-03 16:29:03 UTC
Hello,
    There has not been any response from the Customer. Sorry.

~Anitha