Bug 520723

Summary: [perf] don't call adjust_vmx_controls() a second time
Product: Red Hat Enterprise Linux 5 Reporter: IBM Bug Proxy <bugproxy>
Component: kvmAssignee: Gleb Natapov <gleb>
Status: CLOSED DUPLICATE QA Contact: Lawrence Lim <llim>
Severity: high Docs Contact:
Priority: low    
Version: 5.4CC: chrisw, knoel, sglass, tburke, tools-bugs, virt-maint, ykaul
Target Milestone: rc   
Target Release: ---   
Hardware: x86_64   
OS: All   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2009-09-30 10:15:57 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:
Attachments:
Description Flags
patch to avoid calling adjust_vmx_controls() twice none

Description IBM Bug Proxy 2009-09-02 01:10:26 UTC 
=Comment: #0=================================================
Andrew M. Theurer <habanero.com> - 
---Problem Description---
Need fix for KVM to prevent calling adjust_vmx_controls() a second time
 
Contact Information = Andrew Theurer <atheurer.com> Ryan Harper 
<ryanh.com> 
 
---uname output---
vmlinuz-2.6.18-164.el5
 
Machine Type = x3650M2 
 
---Debugger---
A debugger is not configured
 
---Steps to Reproduce---
 Run a Windows VM on RHEL54.  Collect kvmtrace output.
 
---KVM Component Data---

This problem has a very significant performance impact on Windows VMs running on KVM.

This problem already has a fix upstream.  We just need this applied for a 0 day errata for 
RHEL54.  Upstream patch is here:
http://marc.info/?l=kvm&m=125138769804970&w=2

Performance results are here:
http://marc.info/?l=kvm&m=125140575507242&w=2

I will attach a patch that applies to kmod-kvm-83-105.el5 src rpm

Please mirror this to RedHat ASAP and include Chris Wright <chrisw>
=Comment: #1=================================================
Andrew M. Theurer <habanero.com> - 

patch to avoid calling adjust_vmx_controls() twice
Comment 1 IBM Bug Proxy 2009-09-02 01:10:31 UTC 
Created attachment 359462 [details]
patch to avoid calling adjust_vmx_controls() twice
Comment 2 Gleb Natapov 2009-09-30 10:15:35 UTC 
this is duplicate of https://bugzilla.redhat.com/show_bug.cgi?id=520285
Comment 3 Gleb Natapov 2009-09-30 10:15:57 UTC 

*** This bug has been marked as a duplicate of bug 520285 ***