Bug 1076326

Summary:	qemu-kvm does not quit when booting guest w/ 161 vcpus and "-no-kvm"
Product:	Red Hat Enterprise Linux 7	Reporter:	huiqingding <huding>
Component:	qemu-kvm	Assignee:	Marcelo Tosatti <mtosatti>
Status:	CLOSED ERRATA	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	medium	Docs Contact:
Priority:	low
Version:	7.0	CC:	hhuang, huding, juzhang, knoel, mrezanin, mtosatti, rbalakri, virt-maint, xfu
Target Milestone:	rc
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:	qemu-kvm-1.5.3-66.el7	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:
Clones:	1126666 (view as bug list)		Environment:
Last Closed:	2015-03-05 08:05:12 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:
Embargoed:

Description huiqingding 2014-03-14 05:18:53 UTC

Description of problem:
qemu-kvm does not quit when booting guest w/ 161 vcpus and "-no-kvm"

Version-Release number of selected component (if applicable):
qemu-kvm-1.5.3-53.el7.x86_64
kernel-3.10.0-107.el7.x86_64

How reproducible:
100%

Steps to Reproduce:
1. boot a guest with "-smp 161" and "-no-kvm"
#/usr/libexec/qemu-kvm -no-kvm -smp 161 -m 2G  -monitor stdio -drive file=/home/rhel7.0-64-cp2.raw,if=none,format=raw,werror=stop,rerror=stop,id=drive-ide -device ide-drive,drive=drive-ide,id=test1 -boot c -net none -vnc :10

Actual results:
qemu-kvm doesn't quit, guest hang during boot process with "Failed to acess perfctr msr (MSR c0010004 is 0)"

Expected results:
qemu-kvm should quit.

Additional info:

Comment 6 juzhang 2014-04-28 01:43:45 UTC

Hi Huding,

Can have a try and update the testing result?

Best Regards,
Junyi

Comment 8 Miroslav Rezanina 2014-07-09 12:17:15 UTC

Fix included in qemu-kvm-1.5.3-66.el7

Comment 9 FuXiangChun 2014-08-05 03:17:43 UTC

Reproduced this bug with qemu-kvm-rhev-1.5.3-60.el7ev.x86_64 and "-M pc-q35-rhel7.0.0" or "-M pc-i440fx-rhel7.0.0"

result:
same as comment 0 

verify bug with qemu-kvm-1.5.3-66.el7.x86_64.

result:
1.Number of SMP cpus requested (161), exceeds max cpus supported by machine `pc-q35-rhel7.0.0' (160)

2.Number of SMP cpus requested (161), exceeds max cpus supported by machine `pc-i440fx-rhel7.0.0' (160)

As qemu-kvm-rhev version didn't fix this bug. so QE filed a new bug 1126666.

Comment 13 errata-xmlrpc 2015-03-05 08:05:12 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHSA-2015-0349.html