Bug 795610

Summary: rhel6.1 qemu-kvm host, rhel5.x guest running very slow.
Product: Red Hat Enterprise Linux 6 Reporter: davidyangyi <davidyangyi>
Component: qemu-kvmAssignee: Amos Kong <akong>
Status: CLOSED WORKSFORME QA Contact: Virtualization Bugs <virt-bugs>
Severity: urgent Docs Contact:
Priority: unspecified    
Version: 6.1CC: acathrow, ailan, bsarathy, juzhang, mkenneth, rhod, tburke, virt-maint
Target Milestone: rc   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2012-06-25 08:40:24 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
template deployment.0 none

Description davidyangyi 2012-02-21 03:41:14 UTC
Created attachment 564559 [details]
template deployment.0

Description of problem:
I use rhel6.1 as qemu-kvm host. using opennebula2.2

I set up rhel5.3/5.5/5.6 guests.
But the rhel5.x guests are running very slow.

While I set up another rhel6.1 guest, it is running fast as normal.

Version-Release number of selected component (if applicable):
Host: Red Hat Enterprise Linux Server release 6.1 (Santiago)

Guest: Red Hat Enterprise Linux Server release 5.6 (Tikanga)

How reproducible:


Steps to Reproduce:
1. use virt-manager to install a rhel5.x.img with desktop
2. copy rhel5.x.img to disk.0
3. use deployment.0 to deploy
4. virsh create deployment.0
  
Actual results:

Expected results:
in virt-manager, open the one-7 domain, you can see login very slow and openning a term very slow too

Additional info:

Comment 2 Dor Laor 2012-03-15 10:17:46 UTC
Can you please provide more details - what's slow (time to boot? time to open xterm), can you measure network IO / block IO ?

Please upgrade to newer host/guest as well rhel6.2/rhel5.8.
Try using virtio devices in the guests.
Maybe your original image has issues? Please try to install a fresh image.

Comment 3 Amos Kong 2012-05-03 05:51:24 UTC
Hi davidyangyi, 

Any update of comment #2 ?

Comment 5 Ronen Hod 2012-06-25 08:40:24 UTC
Closing, no replies from the reporter, and otherwise, we are not aware of such issue.