Bug 795610 - rhel6.1 qemu-kvm host, rhel5.x guest running very slow.
Summary: rhel6.1 qemu-kvm host, rhel5.x guest running very slow.
Keywords:
Status: CLOSED WORKSFORME
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: qemu-kvm
Version: 6.1
Hardware: x86_64
OS: Linux
unspecified
urgent
Target Milestone: rc
: ---
Assignee: Amos Kong
QA Contact: Virtualization Bugs
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2012-02-21 03:41 UTC by davidyangyi
Modified: 2015-05-25 00:06 UTC (History)
8 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2012-06-25 08:40:24 UTC
Target Upstream Version:

Attachments (Terms of Use)
template deployment.0 (1.15 KB, text/plain)
2012-02-21 03:41 UTC, davidyangyi 		no flags Details
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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.
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