Note: This bug is displayed in read-only format because the product is no longer active in Red Hat Bugzilla.
RHEL Engineering is moving the tracking of its product development work on RHEL 6 through RHEL 9 to Red Hat Jira (issues.redhat.com). If you're a Red Hat customer, please continue to file support cases via the Red Hat customer portal. If you're not, please head to the "RHEL project" in Red Hat Jira and file new tickets here. Individual Bugzilla bugs in the statuses "NEW", "ASSIGNED", and "POST" are being migrated throughout September 2023. Bugs of Red Hat partners with an assigned Engineering Partner Manager (EPM) are migrated in late September as per pre-agreed dates. Bugs against components "kernel", "kernel-rt", and "kpatch" are only migrated if still in "NEW" or "ASSIGNED". If you cannot log in to RH Jira, please consult article #7032570. That failing, please send an e-mail to the RH Jira admins at rh-issues@redhat.com to troubleshoot your issue as a user management inquiry. The email creates a ServiceNow ticket with Red Hat. Individual Bugzilla bugs that are migrated will be moved to status "CLOSED", resolution "MIGRATED", and set with "MigratedToJIRA" in "Keywords". The link to the successor Jira issue will be found under "Links", have a little "two-footprint" icon next to it, and direct you to the "RHEL project" in Red Hat Jira (issue links are of type "https://issues.redhat.com/browse/RHEL-XXXX", where "X" is a digit). This same link will be available in a blue banner at the top of the page informing you that that bug has been migrated.

Bug 871350

Summary: Add minimal hyper-v support to kvm in order to support relaxed timing feature
Product: Red Hat Enterprise Linux 6 Reporter: Vadim Rozenfeld <vrozenfe>
Component: kernelAssignee: Vadim Rozenfeld <vrozenfe>
Status: CLOSED ERRATA QA Contact: Virtualization Bugs <virt-bugs>
Severity: high Docs Contact:
Priority: high    
Version: 6.4CC: bcao, chayang, dhoward, juzhang, lyarwood, michen, qzhang, rhod, xfu
Target Milestone: rcKeywords: ZStream
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: kernel-2.6.32-351.el6 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2013-02-21 06:54:29 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:
Bug Depends On:    
Bug Blocks: 801196, 895654, 1005207, 1005210    

Description Vadim Rozenfeld 2012-10-30 10:06:32 UTC 
Description of problem:
Add minimal hyper-v support to kvm in order to support relaxed timing feature

Version-Release number of selected component (if applicable):


How reproducible:


Steps to Reproduce:
1.
2.
3.
  
Actual results:


Expected results:


Additional info:
Comment 1 Vadim Rozenfeld 2012-10-30 10:10:56 UTC 
I've added some minimal hyper-v support to kvm.
The relevant build is available at 
https://brewweb.devel.redhat.com/taskinfo?taskID=5024958
Comment 2 Jarod Wilson 2012-12-20 21:25:57 UTC 
Patch(es)
Comment 5 FuXiangChun 2012-12-25 10:55:57 UTC 
reproduce this issue with unfix kernel 2.6.32-347.el6.x86_64 and fixed qemu-kvm-0.12.1.2-2.348.el6.x86_64

steps to reproduce 

1. /usr/libexec/qemu-kvm -m 256G -smp 48,cores=48,sockets=1,threads=1 -cpu cpu64-rhel6,hv_relaxed -drive file=/home/win2k8r2.qcow2,format=qcow2,if=none,id=drive-virtio0,cache=none,werror=stop,rerror=stop -device ide-drive,drive=drive-virtio0,id=virtio-blk-pci0,bootindex=1 -netdev tap,sndbuf=0,id=hostnet0,script=/etc/qemu-ifup,downscript=no,vhost=on -device virtio-net-pci,netdev=hostnet0,mac=00:10:1a:61:72:01,bus=pci.0,addr=0x4,id=virtio-net-pci0 -uuid 7678e130-f1a7-4157-875a-8defcdb27af7 -rtc base=localtime,clock=host,driftfix=slew -no-kvm-pit-reinjection -name amd-max-sut -vnc :1 -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -monitor stdio

result: guest BSOD

verify it with fixed kernel and fixed qemu 
fixed-qemu-kvm-0.12.1.2-2.348.el6.x86_64 and fixed kernel 2.6.32-351.el6.x86_64

use the same steps above.

result: guest work well

so this bug is fixed
Comment 6 juzhang 2013-01-04 05:27:26 UTC 
According to comment5, set this issue as verified.
Comment 8 errata-xmlrpc 2013-02-21 06:54:29 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.

http://rhn.redhat.com/errata/RHSA-2013-0496.html
Comment 9 Ademar Reis 2013-09-06 12:20:54 UTC 
We're going to backport the fix for bug 801196 to the z-stream of RHEL-6.3 and RHEL-6.2, so we need this fix as well, because it's a dependency.