Bug 520285 – windows 64 bit does vmexit on each cr8 access.

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Bug 520285 - windows 64 bit does vmexit on each cr8 access.

Summary:	windows 64 bit does vmexit on each cr8 access.

Status:	CLOSED ERRATA

Aliases:	None

Product:	Red Hat Enterprise Linux 5
Classification:	Red Hat
Component:	kvm (Show other bugs)
Sub Component:
Version:	5.4
Hardware:	All Linux

Priority	urgent Severity urgent
Target Milestone:	rc
Target Release:	---
Assigned To:	Gleb Natapov
QA Contact:	Lawrence Lim
Docs Contact:

URL:
Whiteboard:
Keywords:	ZStream

Duplicates:	520723 (view as bug list)
Depends On:
Blocks:	521793
	Show dependency tree / graph

Reported:	2009-08-30 03:06 EDT by Gleb Natapov
Modified:	2014-03-25 21:01 EDT (History)
CC List:	12 users (show)

See Also:
Fixed In Version:	kvm-83-109.el5
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2010-03-30 03:52:13 EDT
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
patch to avoid calling adjust_vmx_controls() twice (1.06 KB, text/plain) 2009-09-30 06:24 EDT, IBM Bug Proxy	no flags	Details
Add an attachment (proposed patch, testcase, etc.)

External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2010:0271	normal	SHIPPED_LIVE	Important: kvm security, bug fix and enhancement update	2010-03-29 09:19:48 EDT

Groups: None (edit)

Description Gleb Natapov 2009-08-30 03:06:09 EDT

This causes a massive performance problem on Windows x64.

Comment 12 Gleb Natapov 2009-09-17 02:38:15 EDT

I don't know. Some kind of windows performance benchmark may be?

Comment 13 Dor Laor 2009-09-17 02:49:27 EDT

You can use iperf/netperf or any other benchmark.
Please measure the vmexists using kvm_stat

Comment 14 lihuang 2009-09-17 04:10:29 EDT

(In reply to comment #13)
> You can use iperf/netperf or any other benchmark.
> Please measure the vmexists using kvm_stat  

OK . I will do the testing. Thank you very much for the information

Comment 15 Gleb Natapov 2009-09-30 06:15:57 EDT

*** Bug 520723 has been marked as a duplicate of this bug. ***

Comment 16 IBM Bug Proxy 2009-09-30 06:24:33 EDT

Created attachment 363168 [details]
patch to avoid calling adjust_vmx_controls() twice

Comment 18 IBM Bug Proxy 2009-12-04 15:01:14 EST

------- Comment From amdavis@us.ibm.com 2009-12-04 14:50 EDT-------
What is the status of this bug?  Is the RH bug 520285 resolved yet?
Patch reviewed? Accepted?  Target for fix?

Comment 19 Eduardo Habkost 2009-12-04 16:11:11 EST

(In reply to comment #18)
> ------- Comment From amdavis@us.ibm.com 2009-12-04 14:50 EDT-------
> What is the status of this bug?  Is the RH bug 520285 resolved yet?
> Patch reviewed? Accepted?  Target for fix?  

Patch was accepted and included on build kvm-83-109.el5.

5.4.z status was tracked at bug #521793 (it was released on advisory http://rhn.redhat.com/errata/RHSA-2009-1465.html )

Comment 24 IBM Bug Proxy 2010-02-09 16:42:20 EST

------- Comment From habanero@us.ibm.com 2010-02-09 16:33 EDT-------
fixed in errata update
http://rhn.redhat.com/errata/RHSA-2009-1465.html

Comment 26 errata-xmlrpc 2010-03-30 03:52:13 EDT

An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2010-0271.html

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